Homehtsiuser2019-03-11T22:02:12+00:00 LET'S GET DOWN TO EARTH 1 Highland Technical Services is more than an environmental and geosciences consulting firm. We’re a relationship and solutions company. Environmental Assessments and Audits Hazardous Waste Services Solid Waste/Landfill Services Air Permitting Brownfield Redevelopment/Voluntary Cleanup Program Asbestos/Air Quality Testing and Assessment Water Permitting