Four people run BUMM. You meet the rest on the first call.
These four are the C-level. The engineers who will actually build your system are introduced on the first call, because they are the people you work with every cycle.

Urška Jež
Chief Executive Officer
Your commercial counterpart. Urška agrees the scope and the number, signs the Statement of Work, and is who you escalate to when something is wrong.

Matija Podbreznik
Chief Technology Officer
Owns the engineering. Matija decides the architecture, sets what the automated checks refuse to let through, and answers your own technical people directly.

Martin Jarc
Projects
Runs the cycles. Martin holds the plan, leads the planning session and the demo, and tells you a date is at risk the day he knows it.

Bruno Omerović
Chief Forward Deployed Engineer
The engineer who sits on your side of the problem. Bruno takes the first call, works inside your operation to learn what it actually does, and builds against that rather than against a specification written at a distance.
Advisor

Artur Muzič
Advisor · Innovate.si
Advises the company on commercial structure. Artur does not work on client delivery, so he will not appear on your engagement.
Talk to one of them.
The first call is with the people above and the engineers who would do the work. Nobody hands you over afterwards.