Mid-size engineering CSI Engineering is a mid-sized engineering services firm with 11-50 employees and revenues in the 10-25 million range, indicating capacity for sizable multi-discipline projects while remaining agile for targeted opportunities in its region.

Full-service HVAC Electrical The company offers integrated consulting across HVAC, electrical, plumbing, fire protection, and energy studies, presenting a cross-sell opportunity to clients seeking one-stop mechanical and electrical design and efficiency analysis.

Real-world focus Principals actively participate in projects and emphasize timely, budget-conscious, constructible designs, appealing to clients who value hands-on engineering leadership and practical execution risk mitigation.

Regional niche Based in Portsmouth, NH with a long-standing presence since 1996, CSI Engineering can leverage local market knowledge to target regional public sector and commercial opportunities, including energy retrofit programs.

Growth readiness Revenue scale and technical breadth suggest readiness to engage in larger, multi-discipline projects and potential partnerships or joint ventures with larger firms seeking specialized mechanical and energy expertise.