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.
Sean Royal
Project Engineer
Sean recently joined GLY after completing two internships which gave him firsthand experience on high-stakes projects in the construction industry. With a degree in Construction Engineering Technology, he brings a solid foundation of technical knowledge and hands-on experience to his role as Project Engineer. In this capacity, he handles key responsibilities in trade management, overseeing work scopes, ensuring quality and safety compliance, and supporting project scheduling and budgeting. A Kirkland native, Sean enjoys spending his free time on Lake Washington, hitting the golf course, or experimenting with new recipes in the kitchen.
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.
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.
Bryan Haakenson
Principal+Operations
LEED Green Associate
A Northwest native, Bryan embodies GLY’s collaborative, community-centered approach. As a Principal of the firm and our Operations Leader, he oversees GLY’s people resources, processes, and field labor delivery, working closely with salaried and craft team members, human resources, safety, and the Tool + Equipment Yard to ensure operational excellence across the company.
In years prior, Bryan specialized in delivering projects within occupied senior living and other sensitive environments, and continues to provide strategic support to teams working in those market sectors. Today, he also leads GLY’s Sustainability Advocacy Group, helping to identify and implement strategies that reduce the firm’s operational carbon footprint.
Beyond the workplace, Bryan is deeply involved with the Washington State chapter of the Alzheimer’s Association, where he has served in a variety of board roles for over a decade. He and his family love taking advantage of the Pacific Northwest outdoors — boating in the summer and skiing in the winter.
Brian Sandall
Superintendent
LEED Green Associate
Brian’s 30+ year career includes many of GLY’s most recognizable healthcare projects. He will do whatever it takes to keep clients happy and is known to keep a stash of chocolate hard hats on hand for hospital staff just in case. If you’ve ever met Brian, you know he operates under the Golden Rule every single day, making him a favorite to work with. Brian spends many weekends looking for a thrill—from riding off road on the dunes with his wife and son to taking flight lessons—with no plans to slow down any time soon.
Garrick Hughes
Principal
LEED AP BD+C
Since joining GLY in 2007, Garrick’s led construction to support the growth of multiple prominent tech companies, as well as high rise build outs and boutique historic re-developments. Managing complex projects and working with a wide spectrum of people and multi-disciplinary firms to meet client commitments and expectations set years in advance of project completion continues to be the focus of his career. Garrick holds an MBA in Finance from Seattle University as well as a BS in Construction Management from WSU, and a Commercial Real Estate Certificate from UW. He became a firm partner in 2019. A Northwest Native, Garrick’s involved in several local community and professional organizations, and never misses an opportunity for an outdoor adventure, exploring mountains with his wife, two daughters, and son.