Innovative Solutions in Architecture & Engineering Since 1910
LLI Engineering is a Pittsburgh-based architecture and engineering practice providing integrated, full-service design across electrical, mechanical, plumbing, structural, and architectural disciplines since 1910. It specializes in commercial facilities, critical infrastructure, green building design, energy conservation, and project engineering, with completed projects in over 20 states.
LEED (U.S. Green Building Council)
Jamie WhitePresident
Jason BallingerVice President
Carl TheiretDepartment Head, Mechanical Engineering
Donald ArsenaultDepartment Head, Electrical Engineering
Matt Brind'AmourDepartment Head, Architecture
Don JakielProject Manager
Angela LaurineProject Manager
Chris WhiteProject Manager
Rebekah BellhyProject Manager
Complete design of power distribution, lighting systems, standby generation, and automatic control system solutions for commercial and mission-critical facilities.
Design of incoming services, switchgear, automatic controls, and harmonic regulating systems for continuous operational environments.
Integration of standby power generation, solar energy, and natural gas systems to build resilient microgrids with grid-interconnection capabilities.
Custom solutions for HVAC systems, geothermal heating, and building energy conservation aimed at optimizing environmental comfort and operational efficiency.
Implementation of low-impact, sustainable geothermal heating and cooling systems for eco-friendly building operations.
Precision cooling design using Computer Room Air Conditioning units in redundant configurations to support dense computing operations.
Integrated systems engineering covering sanitary infrastructure, advanced rainwater harvesting, fire detection, and specialized suppression networks.
Design of storage and filtration networks for non-potable building applications to minimize municipal utility dependence.
Clean agent gaseous fire suppression systems engineered to protect high-value electronic and utility infrastructure without water damage.
Work in this area is organized into supported delivery tasks.
Support includes Analytical investigation.
Support includes design of building foundations.
Support includes historic facades.
Support includes specialized structural supports for industrial processes.
Comprehensive architectural planning, spatial design, and finish coordination to create highly functional commercial, educational, and residential environments.
Detailed masonry investigation, water proofing, and insulation design to preserve original exterior fabrics while improving building envelope performance.
Updating interior environments with selected finishes, acoustics, and spatial layouts tailored for educational and residential spaces.
Work in this area is organized into supported delivery tasks.
Support includes Professional oversight services contract management.
Support includes field coordination.
Support includes phased execution management to ensure project delivery alignment.
integrated delivery models integrating design and direct construction capabilities for streamlined equipment and facility deployment.
Design and direct construction of protective cabinets, shelters, and enclosures engineered specifically for critical telecommunications infrastructure.
Work in this area is organized into supported delivery tasks.
Support includes Analytical feasibility investigations.
Support includes energy conservation evaluations.
Support includes precise engineering estimates to inform client investment decisions.
Commercial · Healthcare · Airports · Historic Preservation · Government · Hospitality · Data Centers · Mission Critical Facilities · Wastewater · Education · Multifamily Residential · Telecommunications
Pittsburgh, PA · Airports · 2021 · Client: Peoples Natural Gas
A 20-megawatt microgrid merging natural gas and solar energy to provide efficient, reliable power to the airport with excess capacity sold back to the market.
Wexford, PA · Healthcare · 2021 · Client: Allegheny Health Network
A state-of-the-art combined cooling, heating, and power microgrid producing up to 2 megawatts of electricity plus hot water, chilled water, and steam for a hospital facility.
Howard, PA · Hospitality · 2021
A LEED Gold certified eco-friendly hotel featuring geothermal heating and cooling, structural rainwater collection, and low-impact site lighting.
Pittsburgh, PA · Historic Preservation
Masonry investigation, architectural and engineering design, water proofing, vapor barrier, and construction administration for four structures over a hundred years old.