- American Council of Engineering Companies
- Allentown Economic Development Corporation
- Allentown-Lehigh County Chamber of Commerce
- The American Architectural Foundation
- American Association of State and Highway Transportation Officials
- American Concrete Institute
- American Concrete Pavement Association Northeast Chapter
- The American Institute of Architects
- American Institute of Certified Public Accountants
- American Institute of Steel Construction
- American Public Works Association
- American Society of Civil Engineers
- American Society of Highway Engineers
- American Traffic Safety Services Association
- American Water Works Association
- Anthracite Scenic Trails Association
- Association Pennsylvania Constructors
- Aviation Council of Pennsylvania
- Bethlehem Area Chamber of Commerce
- Central PA Chamber of Commerce
- Central Westmoreland Chamber of Commerce
- Clinton County Economic Partnership
- Coalition for Appropriate Transportation
- Construction Specifications Institute
- County Commissioners Association of PA
- Eastern PA Business Journal
- Engineer's Society of Western PA
- Engineer's Week Joint Planning Commission
- Great Susquehanna Valley Chamber of Commerce
- Hanover Engineering Association
- Hugh Moore Historical Park and Museum
- Illuminating Engineering Society of North America
- Intelligent Transportation Systems of PA
- International Code Council
- Lehigh County Historical Society
- Lehigh Valley Business/Education Partnership
- Leigh Valley Economic Development Corporation
- Lehigh Valley Planning Commission
- Loyalsock Creek Watershed Association
- Lycoming County Conservation District
- Mehoopany Creek Watershed Association
- Milton Area Chamber of Commerce
- Mon Valley Branch NAACP
- Mon Valley Progress Council
- Muncy Creek Watershed Association
- NACE International
- National Asphalt Pavement Association
- National Audubon Society
- National Canal Museum
- National Concrete Masonry Association
- National Fire Protection Association
- National Parks and Conservation Association
- National Society of Professional Engineers
- National Wildlife Federation
- The Nature Conservancy
- North American Benthological Society
- PA League of Cities and Municipalities
- Pennsylvania Asphalt Pavement Association
- Pennsylvania Association of Environmental Professionals
- Pennsylvania Building Officials Conference
- Pennsylvania Chamber of Business and Industry
- Pennsylvania Concrete Promotion Council
- Pennsylvania Council of Professional Geologists
- Pennsylvania Highway Information Association
- Pennsylvania Institute of Certified Public Accountants
- Pennsylvania Mapping and Geographic Information Consortium
- Pennsylvania Planning Association
- Pennsylvania Society of Land Surveyors
- Pennsylvania Society of Professional Engineers
- Pennsylvania State Association of Boroughs
- Pennsylvania State Association of Township Supervisors
- Precast/Prestressed Concrete Institute
- Rostraver Business Association
- Society for Ecological Restoration
- Steel Joint Institute
- Steel Structures Painting Council
- Traffic Club of the Lehigh Valley
- Upper Perkiomen Valley Chamber of Commerce
- US Nuclear Regulatory Commission-Licensure
- West Branch Susquehanna Builders Association
- Western Lehigh Business Council
- Wildlands Conservancy
- Williamsport Area Management Association
- Williamsport/Lycoming Chamber of Commerce
- World Wildlife Fund
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