In the spring of 1854, a London physician named John Snow did something that no one in the medical establishment could bring themselves to do. He looked at a cholera outbreak and refused to see what everyone else saw. The reigning theory—held by the most credentialed, the most experienced, the most deeply embedded practitioners of medicine—was that cholera spread through "bad air." Miasma. The experts had decades of experience that confirmed this. They had trained under mentors who believed it, published papers that reinforced it, and built entire careers around it. John Snow was not a miasma man. He was an outsider to that particular orthodoxy, and that is precisely why he was able to trace the epidemic to a contaminated water pump on Broad Street and, in doing so, found the field of modern epidemiology.
Snow's advantage was not that he was smarter than the established physicians. It was that he was not entrained. He had not spent twenty years breathing the same intellectual air as the rest of the medical community. He could see the pattern because he was not embedded in the pattern.
This is a story about cholera. But it is also a story about Chief Financial Officers.
When a company in the steel industry searches for a new CFO, the job description almost always includes a familiar requirement: "steel industry experience preferred." Or sometimes, more emphatically, "required." The assumption is obvious and intuitive. Steel is complicated. It has commodity cycles, scrap pricing dynamics, energy cost structures, capital expenditure rhythms, and labor complexities that someone from, say, consumer packaged goods couldn't possibly understand quickly enough to be effective. The board nods. The search committee nods. Everyone agrees: we need someone who already speaks our language.
But let's pause on that assumption for a moment, the way we might pause at a contaminated water pump that everyone else has walked past for years.
What the steel company is really asking for, whether it realizes it or not, is epistemological alignment. They want a CFO who already shares their way of knowing—who already understands what counts as a meaningful signal in their world, which metrics are load-bearing and which are decorative, what "good" looks like in a quarterly earnings narrative for their particular sector. This is not unreasonable. Shared epistemology reduces friction. It accelerates communication. It means the new hire can walk into the Monday morning meeting and immediately understand why everyone is worried about the hot-rolled coil spread.
The trouble is that shared epistemology also shares its blind spots.
There is a concept in cognitive science called "functional fixedness." It describes the tendency to see objects—and, by extension, situations—only in terms of their conventional use. Give someone a box of thumbtacks and a candle and ask them to attach the candle to the wall, and they will struggle. They see the box as a container for thumbtacks. They cannot see it as a shelf. The box's identity is fixed by its context.
Industry experience does something very similar to financial executives. Twenty years in steel doesn't just teach you the steel business. It teaches you what to pay attention to and—this is the critical part—what to ignore. It creates a hierarchy of relevance that becomes so automatic, so deeply grooved, that it stops feeling like a choice. It just feels like reality. The veteran steel CFO doesn't think they're making epistemological decisions when they dismiss a certain operational metric as irrelevant or when they structure a covenant package the way their industry has always structured covenant packages. They're just being sensible. They're just being experienced.
But sensible and experienced are the words we use for assumptions we've stopped examining.
Now consider a different kind of CFO. Consider someone who has served as an interim Chief Financial Officer across a dozen engagements in ten different industries. Healthcare. Manufacturing. Technology. Retail. Energy. Each time, they walked into an unfamiliar epistemological landscape and had to learn—quickly, under pressure—what mattered and why. Each time, they had to build, from scratch, a mental model of how value was created, how risk manifested, and how information flowed through a particular kind of organization.
This person does not carry the steel industry's epistemology. What they carry is something more rare and, I would argue, considerably more valuable: epistemological agility. They have developed, through sheer repetition across varied contexts, the ability to rapidly acquire a new way of knowing—and to do so with the outsider's crucial advantage of seeing the water pump that the insiders walk past every day.
The serial interim CFO is, in effect, a professional pattern-recognizer who has been immunized against functional fixedness. They have seen enough different industries to know that every industry has its version of the miasma theory—a foundational assumption that everyone on the inside takes for granted but that may, in fact, be the very thing that is obscuring the path to better performance.
This distinction becomes especially sharp in the context of restructuring.
A company that needs a restructuring-focused interim CFO is, almost by definition, a company whose existing frameworks have failed. Something in the way the organization understood itself—its cost structure, its capital allocation, its risk exposure, its relationship with its lenders—turned out to be wrong. The mental models broke. The old epistemology produced confident predictions that did not come true.
And here is the paradox that boards and search committees almost never confront directly: if your existing way of knowing produced the crisis, why would you hire someone who shares that way of knowing to lead you out of it?
The restructuring interim CFO who arrives without industry entrainment brings something that cannot be acquired through decades of sector experience: genuine cognitive freedom. They are not burdened by the unspoken agreements about which sacred cows cannot be touched, which cost centers are politically protected, which assumptions about the business are treated as natural law rather than organizational habit. They can look at the capital structure and see options that the entrained mind has already pre-filtered out. They can examine vendor relationships, operational workflows, and reporting hierarchies without the invisible hand of "that's how we've always done it" steering their analysis.
This is not ignorance. It is the opposite of ignorance. It is the disciplined, practiced skill of rapid contextual learning combined with the strategic advantage of not yet having been told what is impossible.
There is a wonderful phrase that the organizational theorist Karl Weick used: "drop your tools." He studied wildfire fighters and found that in the most dangerous moments—when the fire shifted and escape required running—experienced firefighters often died because they refused to drop their heavy equipment. The tools they had carried for years, the tools that defined their professional identity, became the things that killed them. The survivors were the ones who could let go.
The experienced industry CFO carries tools. Heavy ones. Assumptions about what financial leadership looks like in their sector. Templates for how budgets should be structured, how lender negotiations should proceed, how boards should be briefed. These tools are useful—right up until they aren't. Right up until the situation demands something the tools were never designed for.
The serial interim CFO has learned, through the repetitive discipline of entering and exiting varied engagements, to travel light. They carry frameworks, not templates. Principles, not playbooks. They know how to pick up the right tools for the specific situation and, crucially, they know how to drop them when the fire shifts.
Let me be precise about what I am not arguing. I am not arguing that industry knowledge is worthless. Understanding scrap pricing dynamics or reimbursement structures or semiconductor supply chains is genuinely valuable knowledge. The question is not whether that knowledge matters. The question is whether it matters more than the ability to learn it quickly while simultaneously maintaining the outsider's perspective—the ability to see the water pump.
The pedagogy of an interim engagement—the rapid onboarding, the intensive first weeks of listening and questioning and mapping the terrain—is itself a skill that sharpens with repetition. The tenth interim engagement is qualitatively different from the first. Not because the CFO has accumulated more industry knowledge, but because they have refined the meta-skill of learning. They know which questions to ask first. They know how to distinguish the signals that matter from the noise that everyone treats as signal. They know how to identify the three or four assumptions that are actually driving the business—and to test whether those assumptions are still true.
This is what adaptability looks like at the executive level. It is not a soft skill. It is not a euphemism for "lacks depth." It is a concrete, demonstrable competency forged through the most demanding kind of professional practice: walking into high-stakes environments where you don't know the rules, figuring out the rules faster than anyone thinks possible, and then having the clarity to see which rules should be broken.
John Snow saved London not because he knew more about cholera than the established physicians. He saved London because he knew differently. He could see the pattern—the clustering of deaths around that one pump on Broad Street—because he had not spent a career learning to see something else.
When a company is in distress, when the old maps no longer match the territory, when the financial architecture needs to be reimagined rather than merely maintained, the most dangerous thing you can hire is someone who already knows exactly what to do. Because what they know is what everyone in the industry knows. And what everyone in the industry knows is, by definition, the set of ideas that produced the current situation.
The interim CFO who arrives without the industry's epistemological baggage—who arrives instead with the sharpened instincts of a professional learner, the restructuring specialist's willingness to question foundational assumptions, and the outsider's gift of seeing what the insiders have long since stopped noticing—that is not a compromise. That is not the second-best option. That is the edge.