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About
Who We Are
Leadership
50th Anniversary
Citizenship
Langan International
Services
Site/Civil
Geotechnical
Environmental
Energy
Earthquake/Seismic
Traffic & Transportation
Surveying/Geospatial
Environmental Compliance
EHS Management & Compliance
Landscape Architecture
Land Use Planning
Natural Resources & Permitting
Waterfront & Marine
Geologic Hazards
Demolition
Geographic Information Systems (GIS)
Portfolio
Tall Buildings
Brownfield Redevelopment
Energy: Oil & Gas
Colleges & Universities
Environmental Remediation
Industrial, Manufacturing & Warehouse
Residential
Energy: Power & Transmission
Hospitals & Healthcare
Federal, State & Local Government
Environmental Compliance
Retail
Stadium & Arena
P3/Concession
Infrastructure
Mixed-Use
Resorts, Hospitality & Casinos
K-12 Schools
Office Buildings & Campuses
Waterfront & Marine
Airports
Entertainment, Cultural & Parks
Data Centers
Renewable Energy
Health & Safety
Sustainability
Newsroom
Langan Newsletters
News & Awards
Regulatory Updates
Careers
Search Jobs
Why Join Us
Who We Seek
Testimonials
Career Events
Frequently Asked Questions
Not Ready To Apply?
Connect With Us
Locations
US Offices
International Offices
General Contact
Energy: Oil & Gas
Mariner West Pipeline Construction
Beaver County, PA
Natural Gas Production Facilities
Multiple Locations in PA and WV
Natural Gas Production Well Site
Amwell Township, Washington County, PA
Majorsville to Hopedale Pipeline
West Virginia and Ohio
Freshwater Impoundments for Natural Gas Production
Multiple Locations
Gathering & Transmission Pipelines
Multiple Locations
Gas Compressor Stations
Multiple Locations
Multiple Marcellus Shale Gas Production Well Pads
West Virginia
Tennessee Gas Pipeline – Wetland Mitigation Projects
Bradford and Wayne Counties, PA
Canyon Assessment, Remediation, and Restoration
California
Former Gas Plant Remediation & Ecological Restoration
Santa Barbara, CA
Confidential Refinery Modernization Project
Peru