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Quantum Consulting Engineers offers structural engineering services for new and existing buildings, including new construction, tenant improvements, renovation, and historic rehabilitation projects. We also provide seismic analysis, upgrade design, value engineering, and peer reviews. We have extensive experience designing in structural steel, light-gauge steel, concrete, post-tensioned concrete, masonry, and wood. Our knowledge of historic structures and modernization of existing facilities also provides a valuable understanding of the behavior of various structural systems and enables us to refine the design and efficiently address items that are the key to a successful project. Our vision is to focus on the project and to be a proactive member of the design team. Our clients benefit from Quantum’s single-source, principal-level project responsibility and accountability. We have the resources to properly address all of your project needs, and we pride ourselves on listening to your comments and questions.

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The Quantum Consulting Engineers annual revenue was $6 million in 2026.

21 people are employed at Quantum Consulting Engineers.

Quantum Consulting Engineers is based in Seattle, Washington.

The NAICS codes for Quantum Consulting Engineers are [541, 5413, 54, 54133].

The SIC codes for Quantum Consulting Engineers are [871, 87].

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