Salas O’Brien Merges with Sigma Engineered Solutions

Natick, MA (July 16, 2026) – Salas O’Brien, a national engineering design services firm, has merged with Sigma Engineered Solutions, expanding its capabilities in mechanical, electrical, plumbing, fire protection, and telecommunications engineering design.

Sigma brings deep roots in Raleigh, North Carolina, with a diverse portfolio spanning healthcare, higher education, government, K-12, and commercial markets. The addition of Sigma strengthens Salas O’Brien’s presence in the Southeast while adding a team known for its technical expertise and strong client relationships across both public and private sectors.

“Sigma Engineered Solutions brings a strong track record, deep community roots in the Southeast, and a team of engineers who genuinely care about the quality of their work. Their expertise in facility design across healthcare, education, and government markets strengthens our built environment capabilities and gives our clients even more depth to draw from,” said Darrin Anderson, Chairman & CEO of Salas O’Brien.

“Joining Salas O’Brien is a natural next step for our firm. We’ve always believed that great engineering comes from collaboration, precision, and a commitment to serving the people who use these buildings every day. Being a part of a national organization with that same philosophy means we can do more for our clients and open new doors for our team,” said Reggie Adams, President of Sigma Engineered Solutions.

For more details about this transaction click here.

Morrissey Goodale, a specialized management consulting and research firm exclusively serving the architecture, engineering, and environmental consulting industries, initiated the transaction and advised Salas O’Brien.

Source: Salas O’Brien