Our services include: Construction Services, Energy, Environmental, Geographic Information Systems, Intelligent Transportation Systems, Land and Site Development, Planning and Landscape Architecture, MEP Engineering, Public Works, Right of Way, Structural Engineering, Subsurface Utility Engineering/Utility Coordination, Surveying, Transportation, Water Resources and Water/Wastewater. Company Overview: Halff is a mid-sized, employee-owned, diverse and multi-disciplined professional services firm designed, engineered, planned, constructed — and purposed — for people.