Meet Our Sales Team
James Mock
Rob Stelling
Mark Walker
Tim McSwain
Rob Stelling
Mark Walker
Tim McSwain



Mark Walker
Mark Walker is a 1989 graduate of Sam Houston State University with a BS in Criminal Justice. He spent 13 years in the Criminal Justice field prior to changing careers, and has been in sales for the last 16 years. Primarily in the High Tech industry, he has worked for Dell Computers, Apple and Xerox. Mark's expertise is developing solutions for school districts - helping them to increase indoor air quality and conserve energy while also reducing costs from their overall maintenance budget. Mark covers the South Texas territory for AFP. He and his wife Laura have two kids, Levi and Faith.