Cassie Withrow

Executive Administrator

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.

Mike Martel

Project Manager

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.

Ashley McManigal

Human Resources Manager

PHR, SHRM-CP

Ashley’s friendly and outgoing personality combined with her contagious energy makes her an expert recruiter. She gets down to business when it comes to finding the best talent and is ready to answer any question HR-related. As a diehard Husky and Seahawks fan, Ashley watches and attends football games whenever she can—always in the company of her friends and family. If GLY has an employee adventure or activity planned, you will mostly likely see Ashley there with a big smile on her face—ready to have fun!

Mark Humphreys

Senior Preconstruction Manager

LEED AP BD+C

The depth and breath of Mark’s 25 years of experience allows him to provide exemplary estimating leadership on all types of projects. Mark’s expertise in large-scale ground-up or tenant improvement projects made him a welcome addition to GLY, where he operates as a consummate team player and skilled estimator. When he’s not busy spending time with his daughter and stepsons, you’ll find him kicking around a soccer ball, running, golfing, bicycling, or hiking with his chocolate lab.

Steve Heymes

Senior Project Engineer

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.

Jim Elliott

Principal+Senior Project Manager

A principal and shareholder of the firm, Jim serves as GLY’s healthcare and biomedical construction specialist. Much of Jim’s career has focused on developing the innovative practices that stay ahead of trends in healthcare design and construction. He’s built projects large and small for nearly every major healthcare provider in the region, and is deeply involved in providing leadership to clients and projects. Jim implements Integrated Project Delivery [IPD], Lean approaches, and Prefabrication to help project teams create the best outcomes, and support GLY’s commitment to continuous operational improvement. He is currently engaged in a major campus expansion for Seattle Cancer Care Alliance in South Lake Union.

Noah Martin

Project Manager

Noah started his construction career in 2007 first as a Laborer and then a Finish Carpenter before earning a BS in Construction Management from Washington State University. He also holds a Real Estate Development Certificate from the University of Washington. After joining GLY in 2014, he worked primarily on commercial office projects before becoming a Project Manager on our Interiors + Special Projects team [ISP]. His unique background gives him the ability to understand every aspect of a project regardless of size or scope. He is always up for a challenge—just ask him about his latest extreme ironing endeavor.

Joe Bonacci