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Professional portrait of GLY employee Barrett Moulton.

Barrett Moulton

Yard Superintendent

Headshot of Joe Sahlin

Joe Sahlin

Superintendent

David Craig

Senior Estimator

Headshot of Benji Dimer

Benji Dimer

Project Manager

Headshot of Tim Campbell

Tim Campbell

Executive Vice President+ISP

Matt Alvarado

Senior Design Engineer

Tess Wakasugi-Don

Principal

Headshot of Cassie Withrow

Cassie Withrow

Executive Administrator+Administrative Services Manager

Professional portrait of GLY employee Garth Stoppard.

Garth Stoppard, Jr.

Superintendent

All People

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2026 GLY Construction, Inc.

Headshot of Joe Sahlin

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.

David Craig

Senior Estimator

David is an experienced Senior Estimator with a demonstrated history of working in the construction industry. He offers expertise in Design Management, Facility Management (FM), Cost Engineering, Quantity Surveying, and Constructability. He has utilized his Bachelor’s Degree in Construction Management by becoming a strong community and social services professional who lives by the mantra: "Clarity...No surprises, just choices."

Headshot of Benji Dimer

Benji Dimer

Project Manager

LEED Green Associate

Since joining GLY in 2017, Benji has distinguished himself as a trustworthy team leader who is continuously learning all he can. He is often the first to arrive and last to leave—by choice!—as he truly enjoys his work and is always willing to take on new challenges, mentor others, and push himself to keep learning and growing. Benji can also often be found biking and enjoying the outdoors.

Headshot of Tim Campbell

Tim Campbell

Executive Vice President+ISP

Tim has been with GLY since 2004 and has a hand in a variety of market sectors, but plays a key role as the firm’s Interiors + Special Projects leader. With experience in a wide range of project types, he adapts quickly to evolving trends and changing needs. On each project, Tim facilitates unique and team-oriented solutions to challenges that support the success of the entire team—owner, architect, tenant, and adjacent stakeholders, making him a trusted and respected leader whose industry relationships continue well beyond project completion.

Matt Alvarado

Senior Design Engineer

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.

Headshot of Cassie Withrow

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.

Professional portrait of GLY employee Garth Stoppard.

Garth Stoppard, Jr.

Superintendent

As a second generation carpenter, Garth turned out to be a Jr. in more ways than one. Today Garth is a hard-working Superintendent who enjoys building challenges across sectors, from housing to commercial construction. Garth takes a very thorough, caring approach to getting things done on his projects, and enjoys the outdoor life in his spare time—especially riding dirt bikes, camping or doing anything on or near the water.