Building Enclosure Performance Expert Alex Kosis Joins Simpson Gumpertz & Heger

Mr. Kosis specializes in roofing, waterproofing, and hygrothermal analysis, expanding the firm's presence in the U.S. Mountain Region

Simpson Gumpertz & Heger (SGH) is pleased to welcome Alex Kosis back to the firm as an Associate Principal, bolstering our expertise in building enclosure engineering consulting and sustainable building practices. He joins SGH's Building Technology group from Denver, Colorado, partnering closely with SGH colleagues in the San Francisco Bay Area; Chicago, Illinois; and throughout the United States. Alex brings more than fifteen years of experience in the industry, specializing in roofing and waterproofing system design and repair, and thermal analysis for optimal building performance.

We are thrilled to have Alex back with SGH and look forward to seeing how his professional dedication and personal enthusiasm will create new opportunities for our clients and project partners in Colorado and the Mountain Region.

"Alex has been a tremendously positive presence at SGH ever since joining us straight out of school. It is gratifying to see our homegrown talent progress from intern to partner and turn into leaders and client-focused problem solvers along the way," said Niklas Vigener, SGH Chief Technical Officer. "We are thrilled to have him back with SGH and look forward to seeing how his professional dedication and personal enthusiasm will create new opportunities for our clients and project partners in Colorado and the Mountain Region. SGH is open for business in Denver!"

Alex spent eleven years with SGH to start his career, joining the firm as a technical intern in the firm's Washington, DC, office and advancing to senior engineering positions in Southern California and the San Francisco Bay Area. Most recently, Alex has practiced in Denver and the surrounding region with several prominent building enclosure consulting firms.

"It is great to join SGH and help build on the firm's stellar reputation for solving challenging engineering problems," said Alex. "I am excited to partner with our many experts across the firm and eager to help develop our presence across Colorado and the Mountain Region."

A passionate mentor and leader, Alex is dedicated to sharing his experience and expertise with project partners, team members, and prospective engineers. His industry and academic contributions include serving on ASTM International's ASTM D08 Committee on Roofing & Waterproofing, volunteering as an instructor for Engineer's Alliance with the Arts, and lecturing on building failures and forensic investigations at Pennsylvania State University.

Alex is a LEED Accredited Professional, BD+C, and a registered Professional Civil Engineer in Colorado and California. He received master's and bachelor's degrees in architectural engineering from Pennsylvania State University.

"We are very excited for Alex to re-join our team," said Amy Hackney, SGH Building Technology Region Head, West. "He brings industry-leading technical acumen, a passion for problem-solving, and a knack for team-building that will benefit our team members and client partners in Colorado and beyond. Having a local presence in Denver will allow us to better serve our existing projects and clients in the region and help us grow to serve many more."

Simpson Gumpertz & Heger (SGH) is a national engineering firm committed to delivering holistic advice for our clients' most complex challenges. We leverage our collective and diverse experience, technical expertise, and industry knowledge of structures and building enclosures, advanced analysis, performance & code consulting, and applied science & research to deliver unrivaled, comprehensive solutions that drive superior performance. With more than 600 employees in eight office locations throughout the United States, SGH's industry-leading teams constantly seek to advance the meaning of what's possible. For more information, please visit

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