Business Directory ShareTweetLangan Engineering & Environmental Serviceswww.langan.com2700 Kelly RoadSuite 200Warrington, PA 18976215-491-6500EmailAboutConsulting Engineers/Surveyors Environmental, Geotech & CivilContactsMr. Nicholas DeRose, PG, Principal; EmailMs. Alicia Johnson, Senior Marketing Mgr.; EmailMs. Rosemarie Williams; EmailParticipationChamber EnthusiastsConstruction & Real Estate Related, Engineers Member Directory | Calendar of Events | Member Account | Community Calendar of Events | Job Search | Member Promotions | News | Request for Information