About S I Mechanical

Mike Irwin - President

 Mike has been in the HVAC industry since 1994 and holds an Associate of Applied Science degree. Mike is in charge of managing our field operations. He oversees both our sheet metal installers as well as our pipefitters. In addition to overseeing our field operations, Mike is also a certified NCCER sheet metal instructor. Mike has been with our company since spring of 2012. His project experience includes health care, institutional, correctional, industrial, maritime, sports venues, and tenant finish-out.  

Philip Shultz - Vice President

 Philip has been in the HVAC industry around Austin since 1993. Philip handles all estimating and project manages most of our projects. He started with our company in the spring of 2012. Philip’s project experience includes data centers, clinical labs, medical, process facilities and tenant finish out.​ 

Riley Sullivan - General Manager

 Riley is a fighting Texas Aggie, class of 1998.  He started his career in the petrochem industry traveling the gulf coast before finally settling in the HVAC industry in 2003.   Riley joined SI Mechanical in 2014 as General Manager.  Riley specializes in pre-construction planning, budgeting and estimating. His extensive design-build experience helps customers reach their goals for maintaining the budget while optimizing building performance all on a fast track schedule.  He has experience with all the latest technologies from magnetic bearing chillers to variable refrigerant systems, simple energy recovery systems to sophisticated energy management systems.  Let Riley help you design and construct your next mechanical project.