Home

    • How We Work
    • Mindful of Outcomes
      • Safety
      • Sustainability
      • Lean
    • Resolving Complexity
      • Preconstruction
      • Collaborative Delivery
      • Self-Performed Work
      • MEP Coordination
    • Shaping the Future
      • VDC
      • Data Management
      • R&D
    • All Projects
      • Markets
      • Advanced Technology
      • Community
      • Education
      • Healthcare
      • Hospitality + Dining
      • Interiors + Special Projects
      • Life Science
      • Mixed-Use
      • Office
      • Residential
      • Senior Living
    • About Us
      • People
      • Community
      • Diversity, Equity, Inclusion + Belonging
  • Careers
  • Insights + News
    • Get in Touch
    • Trade Partners + Suppliers
Darkened/stylized background image of construction workers cutting wood

Steve Heymes

MEP Specialist

Stephanie Justice

Marketing Strategist

Tyler Tonkin

President+CEO

Headshot of Cassie Withrow

Cassie Withrow

Executive Administrator+Administrative Services Manager

Headshot of Joe Walker

Joe Walker

Project Executive

Laura Ovsak

Project Manager

Kyle Morgan

Project Executive

Matt Alvarado

Senior Design Engineer

Bryce Engen

MEP+CX Manager

All People

  • Contact Us
  • Trade Partners + Suppliers
  • Privacy + Transparency

2026 GLY Construction, Inc.

Stephanie Justice

Marketing Strategist

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.

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.

Headshot of Joe Walker

Joe Walker

Project Executive

Joe is a self-motivated, engaging and results-driven construction professional with over 30 years of planning, scheduling, value engineering, and estimating experience on high profile and complex construction projects. His years and variety of experience in the industry makes him a valuable member of the GLY team. He can tackle whatever scope of work is required. His work experience throughout the United States [OR, CA, NV, FL, MD, NJ, NY…to name a few] has taught him there’s no place like home. Joe has four children with his wife—and high school sweetheart—and loves to go hunting and fishing whenever he can.

Laura Ovsak

Project Manager

RA, AIA, LEED Green Associate

Laura joined the GLY team in 2017 after spending five years with architecture and engineering design teams. Her varied design experience provides a deep understanding of the design process, and a fluency in the design language. Having worn many hats at GLY, she has developed a diverse skillset, carrying many projects through their phases. Laura recently completed the process of becoming a licensed architect!

Kyle Morgan

Project Executive

LEED Green Associate

Kyle joined the GLY team immediately after earning a BS in Construction Management from the University of Washington in 2006. His honesty and affability have been a mainstay, and he takes a forthright approach to resolving issues and ensuring client satisfaction. After all these years, he still looks forward the unique challenges that come with each individual project and appreciates that no two days are ever alike. While things keep him on his toes at the jobsite, Kyle unwinds by listening to his favorite CDs and records or going to live concerts. Music just sounds better when it’s an experience!

Matt Alvarado

Senior Design Engineer

Bryce Engen

MEP+CX Manager

LEED AP BD+C, BCXA CCP

Bryce is a mechanical systems and commissioning expert and a self-described Swiss army knife. He gets involved during preconstruction assisting with MEP scopes of work. During construction, he becomes hyper focused on QA/QC processes and procedures. On the back end of the job he develops closeout and inspection schedules and plans for startup and commissioning. He is a passionate alumnus of Washington State University, where he studied Construction Management, and minored in Business. His wife, two kids, two dogs, and Macaw parrot keep life busy but fun. Their latest achievement? Building a house together!