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Carl R. Petrus, PE, MBA



Carl is the owner and principal of Petrus Engineering. He brings a wide array of design and manufacturing experience to meet the needs of your capital project. Carl was a senior process engineer with Air Products in Trexlertown, PA, a maintenance manager with H.B. Fuller Co. in Paducah, KY, and a plant manager with Southdown/Medusa Cement Co. in Wampum, PA.  He is an active member in the National Society of Professional Engineers and was ASHRAE trained in HVAC design.  He is also a former ASTM member, for both the cement and concrete technical sub-committees (C-1 and C-9).  He earned a bachelor's degree in chemical engineering from Penn State and an MBA from the University of Pittsburgh.  He is a registered professional engineer in PA, OH, N.J., and FL. 

Earl T. Coffin, PE

Earl is a licensed professional Electrical Engineer that has a broad amount of experience and expertise in the field of electrical and lighting design.  Earl has been responsible for the electrical design at Petrus Engineering since 2006.  He was trained in the US Navy, in the field of radar and electronics, and served our country overseas.  He was awarded a bachelor's degree in Electrical Engineering from Y.S.U.  His work history includes Pratt & Whitney Aircraft, US Steel, the Edward J. DeBartolo Corp., and Pascoe Engineering.  He currently serves on the Mahoning County Electrical Review Board.


Heather L. Hawryliak

Heather is an architectural designer at Petrus Engineering.  She specializes in commercial building design and enjoys using her creative talents to produce cost effective and efficient architecture.  She graduated from Butler Community College with a degree in Architectural Drafting and Design.  Heather has been designing at Petrus Engineering since 2011.


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