Jae Chang
IT Director
Well-versed in translating between technology and business needs, Jae helps GLY make smarter decisions through technology and data. He enjoys working with teams to simplify processes, uncover meaningful insights, and find practical solutions that help people work more efficiently. Outside of work, Jae enjoys fishing, golfing, and trying to keep up on the basketball court. He grew up helping his immigrant parents operate their family-owned Korean restaurant for more than 30 years and is always happy to share recommendations, cooking tips, or family recipes. At home, he and his wife stay busy with their three daughters and a tabby cat who was adopted to help balance the household.
Amanda Smith
Yard Coordinator
As a young girl Amanda lived in Hawaii, where a large portion of her family is Native Hawaiian. After moving to Monroe, Washington she spent her high school years in Mansfield, a small town in eastern Washington. She worked for local trucking company before joining GLY, driving HM350 Haul Trucks around jobsites to load onto lowboy trailers, or she calls them, giant Tonka trucks! As part of GLY’s tool and equipment team, she enjoys supporting Jobs from the ground up and watching as the build happens. Amanda and her husband originally met in middle school and later reconnected. Now you’ll find them riding dirt bikes with their kids and spending time exploring the PNW in their Jeep.
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.
Cesar Torres
CFO
As a natural strategist with an adept financial insight, Cesar contributes immensely to the long-term success and profitability of GLY. As our CFO, Cesar oversees all accounting, financial reporting, and risk management functions. He partners closely with executive and operational leadership to drive financial performance, support strategic growth initiatives, and ensure strong fiscal stewardship across the organization.
Cesar spent more than 25 years in the construction industry before joining GLY, and values working in an industry that builds tangible, lasting structures. Outside the office, he is deeply family oriented–no small feat with more than 100 first cousins! Cesar spends much of his free time visiting family, playing sports with his kids, and volunteering within his community.
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.
Tess Wakasugi-Don
Principal
LEED AP
Tess has built her career at GLY, from humble beginnings as an intern, advancing steadily to a promotion in 2019 to firm principal. She is a dedicated, selfless leader who pays careful attention to every project’s specific vision, technical complexities, and goals. Tess is very effective at coordinating the efforts of design professionals, construction teams, corporate stakeholders, and owners while integrating various service providers into project delivery. She chairs GLY’s internal DEI committee, which focuses on social equity education, employee engagement, and strategies to improve diversity and inclusion on GLY’s projects. Her three young sons inspire her daily to feel empowered, to work hard, and to make time for fun.
Kyla Grennan
Business Development Manager
Kyla brings over a decade of experience in commercial real estate and building services. Since 2014, she has helped drive growth through strategic planning, creative thinking, and a passion for building lasting relationships. Known for her attention to detail and client focus, Kyla is trusted by teammates, clients, and partners alike. Her collaborative approach and commitment to innovation make her a key member of our Marketing and Business Development team.
Outside of work, Kyla enjoys spending time with her family and her dog, Lincoln. She's an avid fan of live music and outdoor concerts, always up for a local adventure or cheering on the Mariners and Seahawks! She also enjoys traveling and hitting the golf course whenever she can. Kyla is a longtime member of the Washington State Society for Healthcare Engineering (WSSHE), where she currently serves on the Board of Directors.
John Schimke
Director of Field Operations
Maintaining a personal philosophy centered on family and teamwork, John has skillfully delivered many high technology projects in his 30+ years in the construction industry. Having spent the majority of his career at GLY, he has led all operational aspects of a project from preconstruction planning through finished product. A mentor to our superintendents and crew supervisors, and creative problem-solver, John continues to infuse his projects with the highest and most innovative level of service.