David Griggs, PE
Principal
Principal
David is most passionate about anticipating problems and providing solutions. In 2017 he founded his first engineering company and built a successful consulting engineering firm supporting the Washington DC market. And in 2026 joined forces with his new partners in the Seattle area to form SGI Structural. David continues to work directly with his clients as a Principal at SGI; utilizing a larger team and a deeper reservoir of experience, he continues to find solutions and steward his client's projects across the finish line from SGI's Baltimore office.
David provides leadership by maintaining direct involvement in planning, design, and production of projects. His dedication to providing effective and efficient services to his clients has resulted in long-term client relationships. David has successfully designed a wide range of complex commercial, residential and hospitality building projects with wood, steel, masonry, and concrete.
David has nearly two decades of experience evaluating structural failures, existing conditions, and providing sophisticated engineering solutions. He has served on DC's Technical Advisory Committee to help influence the adoption and modification of local Building Codes. David takes a hands-on approach for his design projects. He likes to work closely with builders and owners to find cost effective solutions to otherwise complicated obstacles. From initial start-up through final construction, David helps move your project forward.
David provides leadership by maintaining direct involvement in planning, design, and production of projects. His dedication to providing effective and efficient services to his clients has resulted in long-term client relationships. David has successfully designed a wide range of complex commercial, residential and hospitality building projects with wood, steel, masonry, and concrete.
David has nearly two decades of experience evaluating structural failures, existing conditions, and providing sophisticated engineering solutions. He has served on DC's Technical Advisory Committee to help influence the adoption and modification of local Building Codes. David takes a hands-on approach for his design projects. He likes to work closely with builders and owners to find cost effective solutions to otherwise complicated obstacles. From initial start-up through final construction, David helps move your project forward.
Paul Brienen, PE, SE
Principal
Principal
Paul is a structural design leader in the industry with over 30-years of proven experience in large-scale steel and concrete projects. Paul struck out on his own and founded Brienen Structural Engineers in 2014 to focus on Pacific Northwest hospitality and infrastructure, quickly expanding services to include a wide range of complex materials and building types. He is excited to expand the scope of services and mentor another generation of engineers as SGI Structural.
Paul incorporates constructability and economy into design with extensive field experience. He provides state-of-the-art solutions for structures which require unique ideas to accommodate architectural functionality, aesthetics, and economy. Notable projects include EQC I-5 Hotel and Garage, EQC Fife Garages, Washington Place high-rise tower, U.P. Town Center, T-Mobile Park, Seattle Children’s Hospital parking structures in both Bellevue and Akron, OH, and the Millennium Tower.
He serves on several American Concrete Institute Committees, including ACI Committee 374 Performance Based Design, ACI Committee 362 Parking Structures, and ACI Committee 315 Concrete Reinforcing. Paul also holds Patent #US7934347B2 for a unique diagonally-reinforced concrete coupling beam for high rise concrete buildings.
Paul incorporates constructability and economy into design with extensive field experience. He provides state-of-the-art solutions for structures which require unique ideas to accommodate architectural functionality, aesthetics, and economy. Notable projects include EQC I-5 Hotel and Garage, EQC Fife Garages, Washington Place high-rise tower, U.P. Town Center, T-Mobile Park, Seattle Children’s Hospital parking structures in both Bellevue and Akron, OH, and the Millennium Tower.
He serves on several American Concrete Institute Committees, including ACI Committee 374 Performance Based Design, ACI Committee 362 Parking Structures, and ACI Committee 315 Concrete Reinforcing. Paul also holds Patent #US7934347B2 for a unique diagonally-reinforced concrete coupling beam for high rise concrete buildings.
Sara Imbruglio, SE
Principal
Principal
Sara provides creative, technical, structural engineering solutions to aesthetic and architectural challenges, with an emphasis on client value.
Sara’s passion for exposed structure is demonstrated throughout her 20+ year portfolio. In addition to her demonstrated structural engineering expertise, her previous roles as an owner’s representative and construction manager allow for high-level coordination and constructability perspectives alongside the technical detail focus for the project team.
Sara serves as President of SGI Structural, also leading the Wood Construction and Existing Building divisions.
Sara’s passion for exposed structure is demonstrated throughout her 20+ year portfolio. In addition to her demonstrated structural engineering expertise, her previous roles as an owner’s representative and construction manager allow for high-level coordination and constructability perspectives alongside the technical detail focus for the project team.
Sara serves as President of SGI Structural, also leading the Wood Construction and Existing Building divisions.
Our Team of Structural Engineering Experts
Meet the engineers, leaders, and problem-solvers driving precision, safety, and excellence across every SGI project.
Brianna Schildmeyer, SE
Principal
Principal
Brianna is detail driven and project oriented, striving to make every project successful for the owner, design team, contractor, and working towards the architect’s vision, the owner’s needs, and getting the contractor out of the ground and into the building.
With almost two decades of experience across a broad project portfolio, including K-12, higher education, civic, hospitality, commercial, residential, and heavy industrial structures, Brianna brings depth and perspective to the team. Her ability to creatively mesh concepts and ideas from other work and disciplines, as well as innovate, provides uniquely appropriate solutions to any project.
Brianna leads the Woman-Owned Business effort and SGI Structural's Education department, including service on local STEM advisory panels for high school students.
With almost two decades of experience across a broad project portfolio, including K-12, higher education, civic, hospitality, commercial, residential, and heavy industrial structures, Brianna brings depth and perspective to the team. Her ability to creatively mesh concepts and ideas from other work and disciplines, as well as innovate, provides uniquely appropriate solutions to any project.
Brianna leads the Woman-Owned Business effort and SGI Structural's Education department, including service on local STEM advisory panels for high school students.