Who we are

Our staff has over 100 years of mechanical and electrical engineering experience ready to serve your project.

jon shafer, p.e. principal

Mr. Shafer has worked at Sider + Byers since 2005 and became a principal in 2010.  His duties include business management and direction, project management, as well as HVAC design.  Jon has a mechanical engineering degree from the University of Washington.  He is an avid sports fan, enjoys playing guitar, and loves hiking with his wife and two boys.

dana fontes, P.E., Principal

Mrs. Fontes is a native Seattleite with a mechanical engineering degree from the University of Washington. She became a principal in 2013 after beginning her career at Sider + Byers in 1998 as an intern. Her duties include business and project management. She is a sustainability resource for our office, designing and documenting many LEED certified projects since 2001. Outside of work, Dana enjoys gardening, sports (especially Husky basketball) and spending time with her two children and husband.


Mr. Byers joined Sider + Byers Associates in 1988, when the firm was known as Edward S. Sider & Associates. He is now an associate and was a principal from 1993 - 2021. Nathan's responsibilities include project management, engineering training, and is an all-around expert in HVAC and plumbing systems.  He has a BSME from Washington University in St. Louis. He is a Sounders fan and a motorcycle enthusiast.


Ms. Lucas has worked in the construction industry since her graduation from Penn State in 2001.  Her experience encompasses a wide variety of projects specifically focusing on the design of power, lighting and lighting control systems.  She is responsible for department management, project management, electrical design and coordination.


Mr. Whigham grew up in Eastern Washington, so he has experience on both the "dry side" and the "wet side".  James earned his mechanical engineering degree from Gonzaga University, joined our office in 1999 and is accomplished in energy modeling, BIM, HVAC and plumbing design.  He was a volunteer firefighter, which gives him personal insight into his extensive fire station design work.  James enjoys hiking and photography and frequently takes completion photographs of our projects.


Katrina has an Associates of Applied Science in Computer Aided Drafting.  Katrina has worked at Sider + Byers since she began her career in 1999.

She is in charge of the firm’s BIM and CAD production.  Katrina enjoys reading and spending time with family.


Jonathan earned his mechanical engineering degree from Washington State University, and joined Sider + Byers in 2019.  Jonathan is well versed in energy code requirements and forms, and is quickly becoming a competent engineer in the design and build field. Jonathan was formerly in the U.S. Navy and enjoys boating and fishing.


Ryan graduated from Washington State University in 2003 and has been working in the electrical engineering industry since 2006. He has worked as an electrical designer and project manager on a broad spectrum of projects during his tenure. When he is not asking for larger electrical rooms he is usually off exploring the mountainous outdoors on foot, bike or skis.


Justin graduated from the University of Washington with an electrical engineering degree in 1999. Prior to joining Sider + Byers in 2020, he worked as an engineer in telecom. He has experience working with builders, contractors, and other industry engineers. In his spare time, Justin likes to travel and hike with his family, both at home and abroad. 

Brian Fortney, Mechanical Engineer

Brian joined the Sider + Byers team shortly after graduating with a mechanical engineering degree from the University of Washington Bothell. He is quickly gaining the engineering experience and skills necessary to grow in the building design industry. When he’s not snacking at his desk, you can find him playing video/board games, watching sports, or at a local concert.

Phu huynh, Mechanical engineer

Phu graduated from the University of Washington with a mechanical engineering degree in 2021, and joined Sider + Byers in 2022. In his spare time, Phu likes to go hiking and working out to stay in shape. Phu is currently in the Washington National Guard.

marianne hooper- fojt, business manager

Marianne is our business manager, in charge of accounts and marketing since 2007. A native Seattleite, Marianne enjoys gardening and spending time with family (especially her grandchildren!)

anne king, administrative assistant

Anne is responsible for our front office. She has lived in Seattle for 35 years and been employed with Sider + Byers since 2008. Anne enjoys camping, wine tasting and going to concerts but her true passion is her love of animals.



Ed founded the firm as Edward S. Sider and Associates in 1979. Originally from Long Island, Ed received a BSME from Lehigh University. He was a Captain in the Army Corps of Engineers, Chief Engineer at Leo. A. Daly, and a partner at Notkin Engineers before starting his own design firm.

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