High senior recommendation letter but not in tech, what do you think?

Hi guys, I have a bit of a conundrum here:

  • I have a C-Level letter from a Technology Museum I used to worked for. It is not digital tech as such but a company that uses tech for education.

  • And I have a letter from a senior web dev at Microsoft with whom I worked a while ago while I was starting my career in web-design. He’s been updated with my current career progression but effectively, we worked many years ago.

Do any of these work?

I am currently a founder of an app-based business and have been endorsed by an edtech company too, so I’m only missing one recommendation letter.

Many thanks and best of luck to all the people applying.