Core values

At Graboyes, we entrust our employees with the responsibility of always doing what’s right. Our core values guide our attitudes and actions: 

Simply stated, our most important asset is our people. As a team we celebrate each other’s talents and achievements, and we are grateful for the many clients and partners who place their confidence in us. Our goal is to continue to deliver — every single day — on our promise of excellence.

Meet our office staff

Philadelphia MBE commercial window installer

Ellis Guiles, P.E., LEED AP
Owner / President

John Scott, CPA
Chief Financial Officer

Laura Duran Guiles
Corporate Director / VP of Communications

Bill Steedle
Chief Estimator

Mike DelRossi
Director of Pre-Construction

Les Schlemback
Senior Project Manager

Greg Laska
Operations Manager

Gail Bilotta
Assistant Controller

Chris DelRossi
Procurement Specialist