Dwight Hansch
Superintendent
Stephen Robeson
Director of ISP | Project Executive
CHC
As Director of Interiors + Special Projects [ISP], Stephen oversees client service, operational excellence, and employee development for the GLY teams that specialize in renovation and tenant improvement work. He has 20+ years of experience in this environment, including alternative delivery for clients in K-12, Higher Education, Healthcare, and Public Works. He is an ASHE Certified Healthcare Constructor and holds a BS in Construction Management from Central Washington University. With GLY since 2018, he is known for his high energy and ability to juggle multiple commitments with ease while still making time to mentor and guide others. He is an active member of the South Sound community who enjoys spending time with family exploring the outdoors.
Cassie Withrow
Executive Administrator+Administrative Services Manager
Excellent customer service comes naturally to Cassie, who approaches every task with a can-do attitude. As Executive Administrator, she enjoys working with people that encourage her and test her limits but allow her to have fun along the way. She manages her time—and many others’—with extraordinary ease and keeps things running like a well-oiled machine. Outside the office, you’ll find Cassie hiking, exploring the city, and when the sun comes out, boating on Lake Washington—all with her husband and pups by her side.
Tyler Tonkin
President+CEO
Since joining GLY in 1998, Tyler has played a pivotal role in shaping the company’s culture and project delivery excellence. Now serving as President and CEO, he brings a collaborative spirit, deep technical expertise, and a strategic mindset to every facet of the business. Tyler’s leadership has guided some of GLY’s most complex and transformative projects—from integrated hospital expansions to urban highrise developments. His commitment to client advocacy and team empowerment continues to inspire innovation and elevate performance across the organization.
Mike Martel
Project Executive
Associate DBIA™, LEED AP BD+C
Mike joined GLY in 2013 as a Project Engineer and has steadily increased his responsibilities, becoming a Project Manager in 2020. He holds a BS in Construction Management from the University of Washington, where he later returned to earn a Commercial Real Estate Certificate. That’s just one example of Mike’s passion for continuous learning—and sharing with his teammates. He’s especially versed in the latest developments in 3D modeling and navigating the complex processes of advanced BIM visualization. After a long week at work, Mike burns off steam by running, cycling, and skiing.
Amy Bergman
Project Executive
With GLY since 1999, Amy has managed projects in all sectors and of all sizes. This versatility is what helps her guide teams in keeping the end goal in mind while addressing day-to-day challenges and complex problem-solving. She is an alumnus of the University of Washington with a BS in Construction Management and Minor in Architecture, has served on the board of her local YMCA, and is active in NAIOP and CREW. After work, Amy chases two very active children and the lifelong task of home remodeling.
Chris Kelley
Project Manager
Chris is a key player on our Interiors + Special Projects team [ISP], collaborating closely with stakeholders and trade partners in sensitive healthcare and life sciences environments. Before moving to the Northwest, he worked on several notable projects in Oregon and California. As a Project Manager, Chris specializes in detailed estimates, trade partner management, and ensuring high-quality, safe, and organized field delivery. Outside of work, he’s an avid backpacker, hiker, dog lover, kayaker, and camper. Fun fact: while attending the University of Texas at Austin, Chris was a member of the Caretaker and Handler team for Bevo, the university’s live longhorn steer mascot!