Joe Sahlin
Superintendent
Joe embodies a team player, believing that “a successful project is not achieved by a sole individual.” He consistently acts as the glue that adheres the various entities coordinating a project to one another, supporting the successful delivery of a high-quality product. Joe’s perspective that client expectations are a baseline to surpass, is a product of his competitive spirit.
Michelle Connor
Business Equity Specialist
Since joining GLY in 2019 as a Project Coordinator, Michelle steadily assumed more and more responsibilities, eventually combining her personal interest in DEI with our clients' goals for trade equity. Naturally she signed up for our corporate DEI Committee, where she continues to make a valuable impact. As our Business Equity Specialist, Michelle provides project team guidance and support to achieve MWSBE and apprenticeship utilization goals, develops community engagement initiatives, and maintains ongoing community and industry involvement to deepen relationships within the public sector and ensure current knowledge of local, state, and federal regulation for adhering to contract requirements. When she’s not busy chasing her turbo-charged toddler, she’s dreaming up new book club picks that will either dazzle her coworkers or make them question her taste in literature.
Dwight Hansch
Superintendent
Donovan Mabbott
Superintendent
Over the last 30 years, Donovan’s appreciation for quality craftsmanship combined with his natural ability to manage the many moving parts and pieces of a construction jobsite from start to finish has garnered trust and respect from GLY employees, trade partners, and clients. From interior build-outs to full campus developments, he approaches each project by tapping into each team member’s strengths, talents, and skillsets to develop a thoughtful plan—together. Witnessing that plan unfold successfully is his favorite part of his job. On the home front, there is never a dull moment with his four kids, granddaughter, and three dogs—each bringing joy to the family with their own unique personalities. Skylar, the littlest pup, runs the pack.
Annika Gaffney
Human Resources Director
With over 20 years of experience spanning construction, retail, and hospitality, Annika has mastered the art of building and maintaining a positive, inclusive work culture that fosters employee well-being and engagement. Holding a BS in Business Administration with an emphasis on Marketing, Management, and Entertainment from the University of Montana, Annika brings a blend of creative problem-solving and innovative strategies to her role at GLY. When not at work, she can be found enjoying the outdoors, attending concerts, or cheering at sporting events. Growing up playing softball and spending five years managing, assisting, and playing on the company coed softball team, Annika knows how to bring people together — both on and off the field. As the youngest of six, her experience with juggling multiple personalities is put to good use in HR! Annika is also a proud supporter of Sawhorse Revolution, the AGC Education Foundation, and JDRF Beat the Bridge.
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.
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.
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!