- American Engineering Services, Inc.
 - Tampa - AES manufactures water treatment equipment. - American Water Chemicals, Inc.
- Tampa - Provides chemicals and services for boilers, cooling towers, membrane and thermal desalination plants, pasteurizers, and bottle washers.
- Lang Engineering of Florida, Inc.
- Tampa - Environmental remediation projects, including asbestos/lead removal, indoor air quality/duct cleaning, and hazardous waste cleanup.
- Progress Environmental Laboratories
- Tampa - Analyzing soils, waters, and hazardous waste.
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