The Team

John Sternitzke, P.E.

Founder, Engineer

STERNCO’s founder and firm P.E. is a registered mechanical engineer in Arizona and California, a fire protection engineer in Arizona and also holds the QCxP accreditation from the UW Madison and the CxA certification from AAC/AAAB.

John wears many hats at Sternco, but primarily is involved in the design of mechanical, plumbing, fire sprinkler, and related systems and is the firm’s Commissioning Authority (CxA).

We take care of our most valuable asset, our team
Matthew Larson

Mechanical P.E. | QCxP | LEED AP

Sara Larson

Architect | QCxP | LEED AP

Carlos Lopez

Mechanical E.I.T., QCxP

Mario Pitotti

Mechanical and Piping Design

Robert Ramos

Fire Protection Design

Arturo Gutierrez

Architectural Tech

Kathleen Dolan

Architectural Tech

Martin Manriquez

Office Assistant

Tim Locklear

Electrical Design

Jeff Williams

Mechanical E.I.T.

David Watson

Electrical P.E.

Lorraine Zaragoza

Executive Assistant | Office Manager

Susan Sternitzke

CFO