Martin Thériault and the $2 Billion Blueprint for Industrial Sovereignty
In the world of industrial technology, there are those who manage assets — and those who decode the silent language of infrastructure. Martin Thériault belongs to the latter. As the founder of Eddyfi Technologies and the architect who built and then deliberately divided the Previan group, Thériault has spent fifteen years proving that the most powerful innovation is not always about what is new. It is about what is unseen.
The announcement in February 2026— a $1.45 billion USD acquisition of Eddyfi Technologies by American giant ESAB Corporation—is not merely a financial milestone. It is a philosophical confirmation: the moment a spark in Québec City became a global standard for industrial integrity.
From a mortgaged home in Québec City to the largest NDT acquisition in history—the story of a leader who bet everything on a technology most people have never heard of.
Martin Thériault, President and CEO of NDT Global
The Genesis: A Quiet Rebellion Against Stagnation
There is a moment in the life of every true innovator when the safe path diverges from the meaningful one. For Martin Thériault, that moment arrived during the worst financial crisis in a generation.
It was 2009. The global economy was in freefall. Inside the corporate offices where Thériault served as vice-president and general manager of Zetec—a subsidiary of the American conglomerate Roper Technologies—innovation budgets were being slashed, R&D projects frozen, promising technologies shelved indefinitely. The prevailing logic was clear: hunker down, protect margins, survive.
Thériault chose a different frequency entirely. He didn't just leave—he initiated a quiet rebellion. He walked away from a well-established executive position, mortgaged his family home in Québec City for $25,000, and used the money to hire his first two employees. No investors, no venture capital, no safety net—only an unshakeable conviction that the market for industrial inspection was ripe for a radical technological leap that large corporations were too frightened to attempt.
This was the birth of a late-blooming entrepreneur who understood that in the world of Non-Destructive Testing, the greatest risk is not failure—it is the inability to unlearn.
The Education of a Systems Thinker
To understand what distinguishes Martin Thériault's approach to innovation, you must first understand his formation. He is not the archetypal Silicon Valley founder—no garage myth, no dropout legend, no 'move fast and break things' ethos. Thériault is an engineer in the deepest sense of the word: someone who builds systems designed never to fail.
He earned his bachelor's degree in mechanical engineering from McGill University, one of Canada's most rigorous technical institutions, and later completed an MBA at Duke University. This dual fluency—the ability to think in equations and in balance sheets—would prove to be his most decisive advantage. Where many engineers struggle with the language of capital, and many financiers lack the patience for deep technology, Thériault was natively bilingual in both.
Before founding Eddyfi, he spent thirteen years at Air Liquide, the French multinational industrial gas company, from 1994 to 2007. He held leadership positions across Canada, the United States, and Europe—a peripatetic apprenticeship in global operations management that taught him something textbooks cannot: how to listen to a client's unspoken needs inside industries where failure is measured not in lost revenue, but in lost lives.
It was at Zetec, from 2007 to 2010, that the final piece clicked into place. Zetec operated at the intersection of electromagnetics and industrial safety—inspecting nuclear reactor tubes, testing aircraft components, scanning the hidden anatomy of pipelines. Thériault saw firsthand the enormous gap between what the technology could theoretically achieve and what was actually being delivered to clients. He saw an industry resting on its laurels, comfortable with good-enough solutions for problems that demanded brilliance.
The seed of Eddyfi was planted right there—not as an abstract business idea, but as a frustration. A burning sense that better was not only possible, but necessary.
The Science of the Invisible
To appreciate what Eddyfi Technologies actually does, you need to enter a world that most of us never think about—yet our lives depend on it every day.
Non-destructive testing, or NDT, is the discipline of examining the structural integrity of critical assets—nuclear reactors, oil and gas pipelines, aircraft fuselages, offshore platforms, bridges, dams—without damaging them. Think of it as an MRI for industrial infrastructure. When a hairline crack forms inside a steam generator tube at a nuclear plant, or corrosion begins eating through a subsea pipeline thousands of metres below the ocean surface, these flaws must be detected and measured with extreme precision before they become catastrophic.
This is not glamorous work. It does not trend on social media. But it is the invisible backbone of modern civilization—the reason aircraft don't fall apart in mid-flight, the reason nuclear plants don't leak radiation, the reason oil spills remain as rare as they are.
Eddyfi's initial breakthrough was in Eddy Current Array technology, or ECA—a method based on electromagnetic induction. In simple terms, a probe generates an alternating magnetic field that induces small electrical currents (known as eddy currents, or courants de Foucault in French) in conductive materials. When those currents encounter a defect—a crack, a void, a change in material composition—they alter the electromagnetic signal in ways that can be detected and mapped.
What Thériault and his team achieved was to push this physics to its limits: probes capable of generating high-resolution images of microscopic surface defects in real time, at high speed. For nuclear plant operators—Eddyfi's first major client base—this meant detecting flaws that previous instruments simply could not see. The difference between detecting a crack at 0.5 millimetres versus 0.3 millimetres can be the difference between a routine maintenance intervention and a Fukushima-scale event.
The company name itself was a declaration of identity: Eddy for eddy currents, fi for fidelity. A promise etched into the brand: faithful precision in the detection of the invisible.
Six Years of Bootstrapping:
The Discipline of Constraint
There is a certain mythology around startup funding—the pitch deck, the angel round, the Series A celebration. Martin Thériault's story is the antithesis of that mythology.
For six full years, from 2010 to 2016, Eddyfi operated in pure bootstrapping mode. No external investors. No venture capital. Every dollar of growth was funded by the revenue the company generated from its own products. This was not bootstrapping by accident or by failure to raise—it was a deliberate strategic choice that shaped the DNA of the organization in ways that would prove decisive.
When you have no outside capital, every expenditure becomes a test of conviction. You cannot afford to experiment for the sake of experimenting. You cannot chase markets that are not ready. Every engineering hour, every sales trip, every hire must generate measurable technological value. This discipline—which could have been a limitation—became Eddyfi's competitive moat.
While larger, well-funded competitors spread their efforts across multiple markets and technologies, Eddyfi went deep into one: eddy current inspection for the nuclear industry. This hyper-specialization allowed a team of a few dozen engineers to outperform divisions of multinational corporations. By the time Eddyfi opened its doors to institutional investors in 2016, the company was already the undisputed global leader in its niche — a position earned through products, not promises.
There is a profound lesson here for any innovator: sometimes, the absence of resources is itself the most powerful resource. Constraint forces focus. Focus breeds mastery. And mastery becomes the foundation upon which everything else is built.
The Platform Pivot:
Fifteen Acquisitions and the Art of Strategic Assembly
In 2016, everything changed—and nothing changed.
The arrival of two heavyweight financial partners—Novacap, one of Canada's leading private equity firms, and the Caisse de dépôt et placement du Québec (CDPQ), one of the largest institutional fund managers in North America — gave Thériault access to the capital needed to execute a vision that had been forming for years. But the underlying philosophy remained identical: every acquisition must add a new technological capability or open a new geographic market. No financial engineering for its own sake. No empire-building for ego.
Between 2016 and 2025, Eddyfi completed fifteen acquisitions. Each was a carefully chosen piece of a larger puzzle, transforming the company from a specialist instrument maker into a comprehensive technology platform—what Thériault envisioned as a "one-stop shop" for the owners of the world's most critical assets. Boeing, Shell, EDF, and their peers no longer needed to assemble a patchwork of vendors; Eddyfi could provide the complete inspection and monitoring solution.
Consider the range: Silverwing in the United Kingdom brought magnetic flux leakage expertise for storage tank inspection. TSC added ACFM technology for subsea structures—sensors capable of reading through paint and coatings. Teletest contributed guided wave ultrasonics for long-range pipeline screening. M2M in France offered phased array ultrasound systems. Inuktun in Canada brought modular robotics for confined-space inspection. Sensor Networks delivered permanent monitoring solutions with sensors installed directly on assets.
Two acquisitions stand apart in scale and symbolic power.
In 2020, Eddyfi acquired NDT Global for nearly $500 million—a company specializing in in-line pipeline inspection using intelligent pigs (robotic devices that travel inside pipelines to detect corrosion and anomalies). This was a quantum leap: it moved Eddyfi from selling instruments to delivering data-as-a-service, fundamentally expanding the business model.
Then, in 2022, came the acquisition of Zetec for $350 million — the very company Thériault had led as an executive a decade earlier. There is almost a literary quality to this momentquality to this moment: the former lieutenant returning to acquire the castle. But beyond this metaphor, the deal was implacably strategic. It doubled the group's revenue and consolidated its dominance in nuclear and aerospace inspection.
By 2022, the constellation of companies had grown so vast that a new identity was needed. Previan was born—a holding structure designed to house the many specialized divisions under one strategic roof.
The Separation:
Knowing When to Divide in Order to Multiply
In June 2025, Thériault surprised the market with an announcement that ran counter to the usual logic of empire-building: Previan would be split into two independent entities—Eddyfi Technologies and NDT Global.
The reasoning was elegant in its clarity. Eddyfi Technologies operates on a product-and-software model: it develops, manufactures, and sells advanced inspection instruments and robotics. NDT Global operates on a services and data model: it sends intelligent devices through pipelines and delivers critical integrity reports. These are fundamentally different business rhythms — different sales cycles, different client relationships, different growth levers.
Binding them together under one roof, Thériault concluded, was limiting the potential of both. Separation would allow each entity to develop its own balance sheet, its own acquisition strategy, its own trajectory. It was the strategic equivalent of a gardener dividing a rootbound plant: a momentary disruption in service of exponentially greater growth.
This decision — the willingness to break apart something you have painstakingly assembled, because its components will flourish better on their own — is one of the most visionary qualities in leadership. Most founders hold on too tightly. Thériault had the strategic intelligence to let go.
The ESAB Acquisition:
When the Buyer Crowns the Story
On February 2, 2026, the announcement came: ESAB Corporation would acquire Eddyfi Technologies for $1.45 billion USD.
ESAB is not a random buyer. It is a global leader in welding and cutting technologies — the company that helps build the very assets Eddyfi then inspects throughout their operational lives. The strategic logic is elegantly simple: ESAB welds the pipeline; Eddyfi ensures it remains safe for decades. Together, they create an end-to-end workflow from fabrication to lifetime monitoring that no competitor can match.
The financial architecture of the deal reveals its seriousness: an acquisition multiple of approximately 14.5 times EBITDA, with Eddyfi projecting revenues of $270 million and adjusted EBITDA of $80 million for 2026. ESAB expects $20 million in synergies. This is not a speculative bet—it is a precision-engineered strategic marriage.
For ESAB, the logic extends beyond revenue. Inspection services are regulated and mandatory—oil companies cannot choose not to inspect their pipelines, nuclear operators cannot defer tube examinations. This regulatory moat provides Eddyfi with remarkably stable, recurring revenues that smooth out the cyclicality inherent in ESAB's fabrication equipment business.
The Québec Social Contract:
A Founder's Final Negotiation
In the complex choreography of billion-dollar transactions, the details that reveal character are often found in the clauses nobody expects.
Martin Thériault personally insisted that ESAB commit, formally and contractually, to maintaining Eddyfi's headquarters in Québec City and retaining its entire workforce. Of Eddyfi's approximately 1,000 employees worldwide, roughly 450 work in Québec—engineers, scientists, technicians whose expertise cannot be replicated overnight or relocated without immense loss.
In interviews following the announcement, Thériault was true to form: direct and unvarnished. He acknowledged a certain disappointment that no Québécois or Canadian buyer of sufficient scale existed to keep the company entirely domestic. Of the forty companies that expressed interest during the sale process, thirty were American, and only two were Canadian. The math was sobering — a reflection of the persistent gap between Canada's capacity to create world-class technology companies and its capacity to acquire them.
Yet Thériault found solace — and strategic advantage — in the fact that ESAB has designated Québec City as the global centre of its inspection strategy. Eddyfi will not become a satellite office taking orders from a distant corporate headquarters. It will be the beating heart of ESAB's newest and most strategically significant division.
This matters. In the quiet geopolitics of technology transfers, there is a world of difference between selling a company and surrendering a company. Thériault ensured the former without permitting the latter.
The Next Chapter:
NDT Global and the Data Frontier
If this were a conventional success story, it would end here — with the founder cashing out and retiring to a vineyard. But Martin Thériault is not a conventional founder.
Following the Previan separation, Thériault remains president and CEO of NDT Global, the sister company that became an independent entity in 2025. Based in Québec City with 1,300 employees worldwide, NDT Global operates in what may be an even more consequential market: the integrity and safety of the world's energy transportation networks.
The vision for NDT Global extends far beyond traditional pipeline inspection. Thériault is steering the company toward becoming a global authority on industrial data — integrating advanced technologies like Acoustic Resonance Technology with AI-driven analytics to predict failures before they occur, rather than merely detecting them after the fact. The recent acquisition of Entegra, a specialist in gas infrastructure integrity, signals that the playbook that built Eddyfi is already being deployed for this next chapter.
The post-2026 ambition is nothing less than to transform NDT Global into the definitive authority on industrial integrity data — a company capable of preventing oil spills, securing emerging hydrogen networks, and safeguarding the arteries through which the world's energy flows. With the CDPQ and Novacap continuing as active backers, the financial firepower is in place.
The question is no longer whether Thériault can build a second technological giant. The question is how large it will become.
What Martin Thériault Teaches Us About Innovation
At The Innovative Mind, we have profiled many forms of innovation—from the algorithmic elegance of AI companies to the cultural disruptions of immersive technology. Martin Thériault's story belongs to a rarer category: the kind of innovation that is invisible by nature, that works in the margins between engineering physics and human safety, and that measures its success not in user engagement metrics but in disasters averted.
His journey distils several principles that transcend his specific industry.
First, innovation does not require inventing from scratch—it often means solving an existing problem with such radical precision that the old solution becomes obsolete. Thériault did not invent eddy current technology. He pushed it to performance levels that transformed what operators could see and therefore what they could prevent.
Second, constraint is a creative force. Six years of self-funding forged a discipline and a culture of accountability that no amount of venture capital could have produced. When every dollar must earn its place, mediocrity has nowhere to hide.
Third, knowing when to divide is as important as knowing how to build. The Previan separation was an act of strategic maturity that most founders never achieve. It required the rare ability to see one's own creation not as a monument, but as a living system with its own developmental needs.
Fourth, client centricity in high-reliability industries is not a marketing phrase — it is a moral commitment. When your clients operate nuclear reactors and transoceanic pipelines, "understanding their needs" carries a weight that most business strategists never have to confront.
And finally, roots matter. Born and raised in Limoilou, a working-class neighbourhood of Québec City, Thériault has never lost his attachment to the community that shaped him. The annual "Community Week" at Eddyfi — during which employees dedicate a full workday to local volunteer projects—is not corporate social responsibility theatre. It is the outward expression of a leader who believes that a technology company's purpose extends beyond shareholder returns.
A Spark from Québec
There is a phrase that appears in Eddyfi's own communications about the ESAB transaction: "a spark from Québec." It is an apt metaphor for a company born from electromagnetic induction—the science of generating invisible currents to illuminate hidden truths.
But sparks, as any physicist will tell you, are nothing without the conditions that allow them to propagate. Martin Thériault created those conditions: the technical expertise honed through decades of industrial experience, the strategic patience of six years without external funding, the courage to mortgage everything on a conviction, the discipline to acquire fifteen companies without losing coherence, and the wisdom to separate what he had built when unity became a constraint.
As the ESAB transaction nears its expected closing in mid-2026, Québec's technology ecosystem stands at an inflection point. On one side, a proven company (Eddyfi) that will now benefit from the global scale of a major industrial partner. On the other, a seasoned builder (Thériault) embarking on a second act with NDT Global that could prove even more transformative.
The world rarely notices the technologies that prevent catastrophe. We hear about the bridge that collapses, the pipeline that ruptures, the reactor that fails. We almost never hear about the thousands of inspections that catch the flaw in time, that detect the crack before it propagates, that read the invisible language of metal fatigue before it speaks in the vocabulary of disaster.
Martin Thériault has spent his career in that silence—that space between the disaster that happened and the one that didn't. It is, perhaps, the most important kind of innovation there is.
What invisible integrity holds our world together—and who is ensuring it stays that way?
The key milestones in the evolution of Eddyfi:
2009–2010: Founded by Martin Thériault, a mechanical engineer, with initial personal funding.
2010–2016: Self-funding phase focused on developing Eddy Current Array (ECA) technology specifically for the nuclear industry.
2016: Novacap and the CDPQ join as financial partners, marking the beginning of the global acquisition strategy.
2020: Major acquisition of NDT Global for nearly $500 million.
2022: The group rebrands as Previan and completes the $350 million acquisition of Zetec.
2025: Strategic split of Previan into two independent and autonomous entities: Eddyfi Technologies and NDT Global.
2026: Announcement of the sale of Eddyfi Technologies to ESAB Corp for $1.45 billion USD (approximately $2 billion CAD). Martin Thériault remains at the helm as President and CEO of NDT Global, while Eddyfi Technologies remains anchored in Quebec City under the ownership of ESAB.
References:
Martin Thériault, finaliste Prix PDG de l'année AQT - Investissement Québec 2018, accessed February 12, 2026, https://www.youtube.com/watch?v=z2s75ZcrdeM
U.S. Firm ESAB Corp. to Acquire Quebec's Eddyfi Technologies for $2 Billion - IntelligentHQ, accessed February 12, 2026, https://www.intelligenthq.com/u-s-firm-esab-corp-to-acquire-quebecs-eddyfi-technologies-for-2-billion/
ESAB Corporation to Acquire Eddyfi Technologies, Creating an Unrivaled Provider of Complete Workflow Solutions, accessed February 12, 2026, https://investors.esabcorporation.com/news/news-details/2026/ESAB-Corporation-to-Acquire-Eddyfi-Technologies-Creating-an-Unrivaled-Provider-of-Complete-Workflow-Solutions/default.aspx
Eddyfi Technologies Announces Signing of Definitive Agreement to join ESAB, accessed February 12, 2026, https://www.eddyfi.com/en/news/eddyfi-technologies-announces-signing-of-definitive-agreement-to-join-esab
US-based welding tech company ESAB to buy Eddyfi for $1.45 billion USD | BetaKit, accessed February 12, 2026, https://betakit.com/us-based-welding-tech-company-esab-to-buy-eddyfi-for-1-45-billion-usd/
Who We Are | Industrial Technology Group | Previan, accessed February 12, 2026, https://previan.com/who-we-are/
Martin Thériault - Réseau Capital, accessed February 12, 2026, https://reseaucapital.com/en/speakers/martin-theriault-ing-mba/
Who is the CEO of Previan? Martin Theriault's Bio - Clay, accessed February 12, 2026, https://www.clay.com/dossier/previan-ceo
Qui nous sommes | Groupe de technologie industrielle - Previan, accessed February 12, 2026, https://previan.com/fr/qui-nous-sommes/
Eddyfi | Project Suppliers, accessed February 12, 2026, https://projectsuppliers.net/en/brand/eddyfi
Eddyfi Technologies | NDT Services - OnestopNDT, accessed February 12, 2026, https://www.onestopndt.com/ndt-companies/eddyfi-technologies-1
ESAB Bets $1.45 Billion on NDT Leader Eddyfi to Build End-to-End Workflow Empire, accessed February 12, 2026, https://fintool.com/news/esab-eddyfi-acquisition
Previan Announces Strategic Evolution: Eddyfi Technologies and NDT Global to Operate as Independent Industrial Technology Leaders - Caisse de dépôt et placement du Québec, accessed February 12, 2026, https://www.lacaisse.com/en/news/pressreleases/previan-announces-strategic-evolution-eddyfi-technologies-ndt-global-operate
ESAB to Buy Eddyfi for $1.45B, Expanding Beyond Fabrication Into Inspection and Monitoring - MarketBeat, accessed February 12, 2026, https://www.marketbeat.com/instant-alerts/esab-to-buy-eddyfi-for-145b-expanding-beyond-fabrication-into-inspection-and-monitoring-2026-02-02/
NDT Global Announces Strategic Addition of Entegra, accessed February 12, 2026, https://www.ndt-global.com/resources/news/ndt-global-announces-strategic-addition-of-entegra/
Products | Eddyfi, accessed February 12, 2026, https://www.eddyfi.com/en/products
Eddyfi/NDT becomes Previan, accessed February 12, 2026, https://previan.com/2022/06/15/eddyfi-ndt-becomes-previan/
News - Eddyfi, accessed February 12, 2026, https://www.eddyfi.com/en/news
Eddyfi Technologies has signed a definitive agreement to be acquired by ESAB - EC M&A, accessed February 12, 2026, https://www.ec-ma.com/eddyfi-technologies-has-signed-a-definitive-agreement-to-be-acquired-by-esab/
Eddyfi/NDT acquires Zetec from Roper Technologies - McCarthy Tétrault LLP, accessed February 12, 2026, https://www.mccarthy.ca/en/experience/eddyfi-ndt-acquires-zetec-from-roper-technologies
Eddyfi/NDT completes transaction and officially acquires Zetec, accessed February 12, 2026, https://www.eddyfi.com/en/news/eddyfindt-completes-transaction-and-officially-acquires-zetec
NDT Global Acquired by Eddyfi/NDT, accessed February 12, 2026, https://www.ndt-global.com/resources/news/ndt-global-acquired-by-eddyfi-ndt/
NDT GLOBAL ANNOUNCES STRATEGIC ADDITION OF ENTEGRA® - Previan, accessed February 12, 2026, https://previan.com/2025/07/31/ndt-global-announces-strategic-addition-of-entegra/
Previan Spins Off Eddyfi & NDT Global as Independent Firms - OnestopNDT, accessed February 12, 2026, https://www.onestopndt.com/ndt-news/strategic-realignment-eddyfi-and-ndt-global-gain-autonomy-under-previan
PREVIAN ANNOUNCES STRATEGIC EVOLUTION: EDDYFI TECHNOLOGIES AND NDT GLOBAL TO OPERATE AS INDEPENDENT INDUSTRIAL TECHNOLOGY LEADERS, accessed February 12, 2026, https://previan.com/2025/06/05/previan-announces-strategic-evolution-eddyfi-technologies-and-ndt-global-to-operate-as-independent-industrial-technology-leaders/
ESAB: $1.45 Billion Deal For Eddyfi Adds Inspection And Monitoring To Its Workflow Stack, accessed February 12, 2026, https://pulse2.com/esab-1-45-billion-deal-for-eddyfi-adds-inspection-and-monitoring-to-its-workflow-stack/
Un fleuron du Québec vendu aux Américains pour 2 milliards $ | JDM, accessed February 12, 2026, https://www.journaldemontreal.com/2026/02/04/eddify-est-vendue-aux-americains-pour-2-milliards-de-dollars
EDDYFI/NDT ACQUIRES DYNAMIC RISK - Previan, accessed February 12, 2026, https://previan.com/2021/03/31/eddyfi-ndt-acquires-dynamic-risk/
Eddyfi Technologies Announces Signing of Definitive Agreement to join ESAB - Mining.com, accessed February 12, 2026, https://www.mining.com/press-release?id=6980eb0025aad6899cd9a425
Martin Thériault : toujours à la conquête de nouveaux sommets, accessed February 12, 2026, https://www.ambaq.org/fr/articles-et-communiques/martin-theriault-toujours-a-la-conquete-de-nouveaux-sommets
Eddyfi Technologies Announces Signing of Definitive Agreement to join ESAB - Previan, accessed February 12, 2026, https://previan.com/2026/02/02/eddyfi-technologies-announces-signing-of-definitive-agreement-to-join-esab/
