EcoMS consultants worked with the following companies:
- Altadis
- APW Poland
- Arctic Paper
- Bridgestone
- Calsonic Kansei
- Colep CCL
- Complex heat and power plant Wrocław - KOGENERACJA
- Danfoss
- Delphi Energy Chassis Systems
- Elmsteel
- Faurecia (Gorzów, Grójec, Legnica, Wałbrzych)
- Ferroxcube
- Frantschach ¦wiecie
- Gates
- Gedia Poland
- GlaxoSmithKline Pharmaceuticals
- Kappa
- KGHM
- Kronopol
- Lear Corporation (Tychy, ¦widnica, Bielsko-Biała, Płock)
- LG Philips Display Poland
- Lindab
- Mahle
- Metsa Tissue (Konstancin-Jeziorna, Krapkowice)
- Metzeler Automotive Hose Systems (Wałbrzych)
- Metzeler Automotive Profile Systems (Dzierżoniów)
- Mondi Packaging
- NCC Polska
- PGNiG
- Polar
- POLFA Bolesławiec
- Polish Energy Partners
- PTC (Era GSM)
- Print & Display
- Saturn Management
- Scania
- Stanley
- Takata-Petri (Wałbrzych)
- Takata-Petri (Krzeszów)
- Toyota Motor Manufacturing Poland
- Toyota Tsusho Europe
- Trelleborg Automotive
- TRW (Polska)
- Unilever (producer: tee, in. „Lipton” and margarines, in. „Rama”)
- Unilever (producer deep frozen foods in. Algida)
- Unilever (producer: Knorr, Hellmans)
- Valeo
- Vesuvius Skawina