Mainstay Engineering Group Named to Building Design+Construction's 2026 Giants 400 List, Ranked Among Top 80 Engineering Firms
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Recognition reflects Mainstay's continued growth serving mission-critical sectors including life sciences, data centers, and advanced manufacturing.
BLUE BELL, PA — September 22, 2026 — Mainstay Engineering Group, Inc. (MainstayEngineering.com), a leader in civil and structural engineering solutions, today announced its recognition on Building Design+Construction's (bdcnetwork.com) 2026 Giants 400 List, placing among the Top 80 Engineering Firms in the country.
The Giants 400 report is one of the design and construction industry's most closely watched annual rankings, recognizing the largest and most influential architecture, engineering, and construction firms in the United States based on revenue and market impact.
With nearly 25 years of roots in the life sciences and pharmaceutical community, Mainstay has built a reputation as the infrastructure behind its clients' innovations, supporting mission-critical projects across life sciences, pharma, data centers, sustainable energy, and advanced manufacturing. Headquartered in Blue Bell, Pennsylvania, in the Philadelphia Metro Area, the firm expanded its footprint in January 2025 with the addition of a South Carolina division.
This recognition on the Giants 400 list underscores Mainstay's growing role in supporting the infrastructure demands of the country's most complex and fastest-growing industries.
About Mainstay Engineering Group:
Mainstay Engineering Group, Inc. is a multi-discipline, civil and structural engineering firm serving mission-critical industries and designing for the most complex and critical environments including, life sciences/biotech, pharmaceutical, data centers, industrial & manufacturing, and healthcare. With nearly 25 years of roots in the life sciences and pharma community, Mainstay serves as the infrastructure behind its clients' innovation. Headquartered in Blue Bell, Pennsylvania, the firm also has operations in South Carolina. For more information, visit MainstayEngineering.com.
Media Contact:
Christine Sciarrotta
VP, Business Development & Strategy
Mainstay Engineering Group, Inc.