An interim CTO is for the gap that can't wait

An interim CTO is for the gap that can't wait

A 40-person software business loses its CTO three weeks after signing a client contract that names a technical lead and sets delivery milestones for the next two quarters. A proper search for a permanent replacement takes four to six months if it goes well. The client doesn't care whose name is on the org chart; they care that the milestones land.

That's not a fractional problem. Fractional buys a day or two of judgement a week, indefinitely, and that's exactly what a business with no one running engineering doesn't have time for. It's not a consultant's job either. A consultant produces a recommendation and moves on; this business needs someone in the building, owning delivery, every working day, starting now.

What interim is for

Interim leadership means full-time and fixed-term: an experienced CTO who steps in, runs the team, owns delivery, and hands over cleanly once the gap closes. The fixed-term part isn't a discount on commitment. It describes the need. The business isn't short of full-time technology leadership forever. It's short of it for exactly as long as this gap, this transformation, this stabilisation takes.

That split is worth holding onto against the other two models. A consultant advises on a decision and steps back; an interim leader executes one, day after day, for as long as the seat needs filling. A fractional leader shows up for a slice of every week, indefinitely, because the business genuinely never needs more than that. An interim leader shows up for nearly all of most weeks, for a defined stretch: right now it needs all of it, and once the gap closes it won't need any.

The tell

Ask what happens if nobody fills the seat for six months. "We'd muddle through and the judgement calls would pile up" is fractional. "The team has no one running it and the client contract is at risk" is interim, and the fix isn't a few hours of advice a week. It's a person, full-time, until the gap is closed.

Two other situations call for the same model, less obviously but just as squarely. A hiring process that's going to take longer than the business can safely wait needs someone holding the seat in the meantime. And a bounded transformation, a platform migration or a post-acquisition integration, needs someone's full attention for exactly as long as it runs, and nobody's once it's finished.

If your business has a gap that needs filling now and a permanent hire that isn't ready yet, book a conversation.