LLI Engineering

LLI Engineering has been providing top quality engineering and architectural design services since 1910. Our core values include providing straightforward communication, meticulous contract management, cost-effective construction, and business-driven client solutions. Located in Pittsburgh, Pennsylvania, we have completed projects in over 20 different states, specializing in commercial, critical facilities, infrastructure upgrades, green building design, energy conservation modifications, project engineering, and engineering estimates. We offer a full range of services including architectural, interior design, electrical, mechanical, plumbing, and structural engineering services.