3i Strategies

Advantek Waste Management Services/GeoEnvironment Technologies

AECOM

American Infrastructure Holdings

Ampcus, Inc.

Anaergia, Inc.

Aquasight

Arcadis

Atkins

Black & Veatch Corporation

Blue Cypress Consulting, LLC

Brown and Caldwell

Burns & McDonnell Engineering Company, Inc.

Carollo Engineers, Inc.

Causey Consulting

CDM Smith

Coal Creek Environmental Associates

Core Consulting Group, LLC

D & B Engineers and Architects, P.C.

EMA, Inc.

ENS Resources, Inc.

EPC Consultants, Inc.

Galardi Rothstein Group

Garver

Geosyntec Consultants

Greeley and Hansen LLC

Greenman-Pedersen, Inc.

Gresham Smith

Hach

Hazen and Sawyer

HDR Engineering, Inc.

HydroDigital

InSinkErator

Isle Utilities

Jacobs

Kando

Kennedy/Jenks Consultants

KETOS

Kiewit

Larry Walker Associates, Inc.

LimnoTech

LuminUltra Technologies, Ltd.

Lystek International Corporation

MMO Consulting

Moonshot Missions

Ovivo USA, LLC

Plummer Associates

R2O Consulting

Raftelis

SENTRY Water Quality Monitoring and Control

Shield Engineering, Inc.

SmartCover Systems

Stantec

Synagro Technologies, Inc.

Tetra Tech, Inc.

Veolia North America

Wade-Trim Associates, Inc.

Waste Management

WSP USA

XPV Water Partners

Xylem Inc.