I saw him with the SF Jazz Collective a couple of years ago. That lineup was comprised of Bobby Hutcherson, Dave Douglas, Joshua Redman, Renee Rosnes, Eric Harland, Andre Heyward, and Matt Penman. Zenon more than held his own on the front line with Douglas and Redman (in fact Redman was probably the least interesting soloist that night, I thought, despite his being the artistic director).
Zenon's still in the SF Jazz lineup currently, alongside Mark Turner, Avishai Cohen, Robin Eubanks, Stefon Harris, Edward Simon, Penman, & Harland.