Northern Light
Superstar
You are all overestimating the requirements from the c-suite. The CEO doesn't need to be a railroad guy.
The most important thing is you hire a leader who knows how to hire, motivate, and support the best people/experts to do the job.
I certainly believe the above to be key characteristics of a good CEO.
I also agree that these are transferable skills.
Further, I'm happy to agree that a CEO need not be a technical expert in every facet of the business that he/she operates, indeed, for larger organizations this is a near impossibility.
That said; a measure of familiarity with the business from both a customer-facing, and a technical level is highly desirable.
All the more so, when the key item with which one is charged is overseeing a highly technical, multi-year project, which is capital-intensive, infrastructure-building at its core.
This is not an organization that will have deep levels of in-house staff during the new CEO's tenure, unless they manage to last 10+ years in the gig, and do a variety of things in-house (which seems unlikely).
The job here is going to be selecting, then overseeing a private proponent's build and operate strategy, the latter, only to the extent of insuring that the the strategy makes some measure of sense, and that the build services it properly.
In such a case, the primary job, I would argue, will be vision (what do we want/need this to be); (will this serve the customer); and then direct oversight of building and rolling stock selection and quality control; and given an organization with no current staff who have these capabilities, it would seem wise to select a CEO with some ability to understand these things beyond a superficial level.
The CEO doesn't need to have experience literally laying railway tie, or ballast, nor operating or maintaining a train; but they should have some ability to judge how to best carry out these tasks in light of the service and budgetary objectives with with which they are charged.
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Edit to add: I have seen first hand, in the business world, people who do not understand their brief in middle and upper management. They don't get the needs of the consumer or front-line labour, or why something is done the way it is; and I have seen that result in enormous mistakes that have cost shareholders 10s of millions or worse.
It leaves me leery of transplanting people from completely different fields into senior leadership in an organization. To be clear, it can work; but you need to have a great supporting team in place, one which allows a new leader to be that organizing, motivating figure that you describe; and one that also can help education the leader on the needs-to-know, with said leader being a good and quick study.