Applied Technologies, Inc. (ATI) is a multi-discipline engineering/architectural firm specializing in water/wastewater management for the public and private sectors. ATI provides services such as the following:

- Biological (aerobic and anaerobic) treatment
- Design/build
- Energy recovery and conservation
- Engineering evaluations and studies
- Environmental audits
- Microbiological analysis
- Nutrient removal
- Oil and grease removal
- Permitting assistance
- Physical/chemical treatment
- Services during construction
- Waste minimization
- Waste recycle/reuse
- Waste solids handling and treatment
- Wastewater characterization
- Wastewater treatment plant operations training