Clients / owners IMPaC has served:

AEG Kanis
Agip-KCO
Agip Oil Company
Air Liquide
Babcock
Bayer
BEB (Exxon/Shell upstream)
BG Tunisia/Pireco
Bilfinger & Berger
Blohm + Voss
Bohai Oil Corporation
Bohlen & Doyen
BP Köln
Britoil/Jalite
Campenon Bernard SGE
Chevron / MAB
China National Offshore Oil Company (CNOOC)
Deilmann
Deminex
Deutag
DRECO
DOW Chemical
Dyckerhoff & Widmann
EC Dormagen
ExxonMobil
Germanischer Lloyd
GKSS
Hamburger Gaswerke
Hindustan Petroleum / Dodsal
Hochtief
Holborn Europa Raffinerie
Howaldtswerke Deutsche Werft (HDW)
Indian Petrochemicals Corporation (IPCL)
Keppel FELS
Koch de Portugal
Koch Transporttechnik
Linde
Mallard Bay Drilling
MAN GHH Öl & Gas
Mannesmann Anlagenbau (MAB)
McDermott
Mobil Exploration & Production

 Neptun Marine Service
Nexans
Nigerian National Petroleum Corporation (NNPC) / MAB
N.I.O.C
Nord Stream
North Aegean Petroleum Company (NAPC)
OKIOC - Offshore Kazakhstan International Operating Company
OMV
Petroci - Société National d´Operations Petrolières de la Côte d´Ivoire
Petrojet
PETROM
PetroSA
Phillips Petroleum / Deutag
Port of Hamburg / Dakosy
Preusag
Reading & Bates
Reliance Industries
Repsol
RWE Dea
Saga Petroleum
Saipem
Shell Petroleum Development Corporation of Nigeria (SPDC)
Sieghold
Siemens
Shell Kazakhstan
S.I.P.M / Shell
Snamprogetti
StatoilHydro
Suez Oil Company (SUCO)
Texaco
Thyssen
Transocean
Türkiye Petrolleri (TPAO)
W. Vogel
Wiik & Höglund
Wintershall