Dwight Hansch
Superintendent
Dennis Sizemore
Cement Mason Superintendent
Dennis is the go-to guy on anything and everything concrete. At age 15, he poured and finished driveways, patios, and shop slabs. When he started at GLY at 18, he was the youngest journeyman in his union. Today, he's a concrete master who oversees projects up to one million square feet. His favorite aspect of the job is the constant change of scenery since he's not on one single project for an extensive amount of time. While concrete is a big part of Dennis’s life, he makes plenty of room for his kids, fishing, hiking, and visiting Kauai, his happy place.
GLY
Stephanie Justice
Marketing Strategist
Bryce Engen
MEP+CX Manager
LEED AP BD+C, BCXA CCP
Bryce is a mechanical systems and commissioning expert and a self-described Swiss army knife. He gets involved during preconstruction assisting with MEP scopes of work. During construction, he becomes hyper focused on QA/QC processes and procedures. On the back end of the job he develops closeout and inspection schedules and plans for startup and commissioning. He is a passionate alumnus of Washington State University, where he studied Construction Management, and minored in Business. His wife, two kids, two dogs, and Macaw parrot keep life busy but fun. Their latest achievement? Building a house together!
Josh Lewis
Senior Project Manager
Organized, decisive, and driven, Josh approaches every project with a clear understanding of the client and company’s needs. His favorite part about his position is that no two projects are every alike, as he is a person who enjoys overcoming the hurdles of a project from start to finish. Quite fitting to his problem-solving nature, he enjoys classic games that require lots of thought and strategy, from chess to backgammon to cribbage. Outside of work he also stays busy coaching youth baseball, softball, basketball, and his son’s Little League All-Star Team, who made it to the State Championship in 2024!
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.
Cameron Cole
Senior Project Engineer
A Bellevue native, Cameron built the foundation for his career through several internships at GLY and earning a BS in Construction Management from Weber State University. His project experience thus far has focused on downtown Bellevue, including the Lincoln Square Expansion and West Main mixed use development. Off the jobsite, he’s an avid outdoorsman – hunting, fishing, skiing, and backpacking – and volunteering as a member of the King County Search and Rescue team. He recently stepped up to serve on the Coal Creek YMCA board of advisors.