Since 1974, Professional Engineering Associates (PEA) of South Carolina has proudly served clients throughout the Southeast with trusted civil and structural engineering solutions. The company built a reputation on technical excellence, responsive services, and a commitment to delivery quality across a wide range of industries.

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We are excited to share that as of January 2025, PEA was acquired by Mainstay Engineering Group, Inc., a leading civil and structural engineering firm with a shared passion for client service, technical integrity, and innovation. With this transition, we are expanding our reach and capabilities – bringing together five decades of experience and a broader team to better serve your project needs.

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While our name has changed, our values remain the same. You’ll still find the same commitment to excellence that defined PEA – now strengthened by Mainstay’s deep expertise in Science and Technology, and other mission-critical sectors, including: life sciences, biotech and pharmaceutical, industrial and manufacturing, healthcare, data centers & semiconductors, renewable energy, education, oil & gas, and other critical infrastructure.

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To learn more about our combined capabilities, current projects, and how we can support your next challenge, we invite you to explore our Mainstay Engineering Group website.

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Thank you for being part of the PEA legacy. We look forward to continuing to serve you – now as part of the Mainstay team.

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Visit MainstayEngineering.com