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Steve Heymes

MEP Specialist

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Jeff Angehrn

Senior Construction Engineer

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Bryan Haakenson

Principal+Operations

Amanda Smith

Yard Coordinator

Demetrios Stamatakis

Senior Project Engineer

Dennis Sizemore

Cement Mason Superintendent

Jackson Reid

Senior Project Engineer

Ben Hamm

Project Executive

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Danielle Sessler

Senior Project Manager

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2026 GLY Construction, Inc.

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Jeff Angehrn

Senior Construction Engineer

Jeff’s building career began in 1995 and he’s simply one of the best when it comes to complex structures; it’s been said that he’s memorized every detail of every sheet of every project he’s worked on. Plus, he’s repeatedly recognized by his teammates as an exceptional mentor. He holds a BS in Construction Management from Central Washington University. Off the jobsite, Jeff’s an adventurous spirit who enjoys time with family and friends, traveling, boating, snowmobiling, off roading, fishing, and hunting in the remote wilderness.

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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.

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.

Demetrios Stamatakis

Senior Project Engineer

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.

Jackson Reid

Senior Project Engineer

LEED Green Associate

Jackson is a Senior Project Engineer best known for his natural sociability and ability to boost jobsite morale. He remains positive and resilient when faced with challenges and believes that division of labor does not mean a relief of responsibility. With a strong team–first mindset, he understands the collective effort required to deliver successful projects, which is why he enjoys starting his days early on the jobsite and staying engaged with his team throughout the day. Outside of work, Jackson is an energetic outdoorsman who spends his time in the mountains or on the water. He enjoys biking, hiking, surfing, snowboarding, skiing, running, and fishing, and is a former student–athlete who played lacrosse at the University of Washington and with Seattle–area teams. He is also an FAA–certified Unmanned Aircraft Pilot and enjoys flying his drone to capture aerial jobsite photos.

Ben Hamm

Project Executive

Assoc. DBIA™

Ben honed his exceptional leadership skills during his first calling as a high school English teacher, coach, and director of admissions. Patient, communicative, and adaptable to change, the AEC industry scored big when he decided to switch gears and earn another degree, this time in Civil Engineering. Progressing from Project Engineer to Project Executive at GLY, he continues to leverage his diverse background—listening intently to clients and teammates prior to making critical decisions. Hailing from Western New York, where cows outnumber residents, Ben remains a loyal Buffalo sports fan—Go Sabres and Bills!

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Danielle Sessler

Senior Project Manager

Associate DBIA™

Construction was always part of the plan for Northwest native Danielle, having grown up in a family that owned a contracting business. She took a few detours first, earning a BFA in Metalsmithing and Art History from Central Washington University and working as a Senior Estimator focused on honing her preconstruction services skills. When she landed at GLY in 2013, we quickly recognized her background would be perfect for Design-Build projects. Outside of work, Danielle enjoys hiking, bouldering, climbing—and collecting “odd things that most people scratch their heads over.”