Can you create a tech priest PC in DH2?

Have you tried reading a corebook? Page 52, Background: Adeptus Mechanicus.

Well I looked thru the character types and didn't see one unlike in dh1.

Even through your reply was a bit snide I appreciate the point in the right direction.

I guess something like home world Forge World (DH2 p. 34) + background Adeptus Mechanicus (DH2 p. 52) + role Chirurgeon (DH2 p. 64, for a Magos Biologis), Hierophant (DH2 p. 68), Seeker (DH2 p. 74, for an Explorator), or Sage (DH2 p. 72) should work fine for a Tech-Priest.

Isn't the seeker basically a bounty hunter?

Seeker alone is just a role not a job description. I think the seeker role is equally well suited to represent someone hunting for artifacts not just a bounty hunter. The character system of DH2 is very flexible in this respect. In the end the only thing that a tech-priesty character definitely should have is the Adeptus Mechanicus background apart from that almost every combination of background and role is conceivable for some kind of tech-priest, I would say.