Doylestown, Pennsylvania

Selected Projects

Sediment Remediation Confidential

Oldmans Industrial Park Swedesboro, NJ

Lafayette College – Rockwell Integrated Sciences Center Easton, PA

Bridgeview Bridgeport, PA

Route 33/Main Street Interchange Palmer Township, PA

Integrated Contingency Plan Bangor, PA

Verizon Pennsylvania, LLC – Air Quality Permitting and Compliance Pennsylvania

News and Awards

News March 27, 2024

AnnMarie Vigilante Named in Lehigh Valley Business’ Power 100 List

Lehigh Valley Business named AnnMarie Vigilante, PE, one of its Power 100 for 2024.... read more

Award June 27, 2023

Langan Honored with Zweig Group Trifecta Award

Zweig Group recognized Langan with three awards for 2023, completing the trifecta: Hot Firms, Best Firms to Work For, and Marketing Excellence.... read more

News July 29, 2020

AnnMarie Vigilante Named 2020 Lehigh Valley Woman of the Year

The Leukemia & Lymphoma Society named AnnMarie Vigilante, Senior Associate, as the Lehigh Valley Woman of the Year.... read more