We are Summit. We care.

Yi Yang, S.E.

Managing Principal

Yi came to Summit Engineering in 2001 and began working to expand Summit’s structural design of wineries, commercial and industrial buildings, residential structures, bridges, and seismic retrofitting. In 2018, Yi became Managing Principal at Summit and remains involved in project management and structural concept design on select projects, as well as day-to-day management of the firm.

Jasper Gehring, P.E.

Principal, Electrical Division Manager

Jasper is a talented Civil Engineer currently managing our Electrical Engineering Division. He has over 20 years of experience in design engineering, and since joining Summit, he has loved having the ability to watch projects develop from conception to completion. His specialties include utility system design, site-work development design, engineering due diligence, and multi-discipline project management. His depth of knowledge in utility design has led to the successful completion of complex projects, performance of peer reviews, and serving as an expert witness.

Demae Rubins

Principal, Planning Division Manager

Demae is an accomplished planner with over 20 years of experience in the industry. With a background in Landscape Architecture and Environmental Design, she has a particular eye for master planning and facility design. Along with her knowledge in facility design and planning, she also has extensive knowledge in land use planning, design entitlement processing and construction management, and advanced comprehension of Sonoma, Napa, Solano, and Merced County guidelines.

Kyle Moyer, P.E.

Associate, Structural Division Manager

Kyle started his career in structural engineering with a degree from Pennsylvania State University. Now at Summit, Kyle has more than 15 years of structural engineering experience on a variety of projects small, large, domestic, and internationally. His primary areas of expertise include structural design and engineering of building systems and connections, catwalks, rigging systems, welding, and constructability.

Tania Schram, P.E.

Associate, Civil Division Manager

Gina Giacone, P.E.

Principal, Water/Wastewater Division Manager

Gina has a background and education in environmental resources engineering and is a licensed Civil Engineer. Summit was Gina’s first job right after graduating from Humboldt State University and she has grown up alongside the firm ever since. Now, as a Principal and manager of the Water/Wastewater Division, she is responsible for managing a wide variety of projects that cross all disciplines, with a special emphasis on the planning, design, and permitting of water and wastewater treatment plants, collection systems, and disposal systems. Gina has vast experience designing systems ranging from 1,000 gallons per day to over 1 million gallons per day.

Ashleigh Higgins

Associate, Controller

Ashleigh didn’t initially plan to work in accounting, or even in business at all for that matter. Her high school job in a winery warehouse eventually led to her assisting the accounting department, and her hands-on experience in a variety of roles is what led her to purse an MBA. Ashleigh completed her MBA program while working in motorsports, and has since joined Summit. According to Ashleigh, “I enjoy using the numbers to tell a story rather than just sending out reports.”

Caylah Lunardi

Human Resources Manager

Caylah has over 15 years of managerial experience, with a passion to inspire, train and develop others. She is accomplished in a variety of company disciplines, including employee relations, recruitment, talent management, safety and wellness, and regulatory compliance. Caylah upholds Summit’s core commitments and believes in the collective power of difference to make things better for our team and our clients.