Below is a selection of companies that have appointed Seacroft Marine Consultants or worked alongside over recent years:
| Aberdeen Drilling Company | Kinsale Energy |
| Aberdeen Harbour Board | Lundin UK |
| Achater Offshore | Maersk Contractors |
| Agip | Maersk FPSOs |
| Aker Offshore Partner | Maersk Oil North Sea UK Limited |
| AMEC | Maersk Supply Services |
| Anartya Limited | Mainport (Ireland) Ltd |
| Apache North Sea Limited | Marathon Oil (UK) Limited |
| Aptomar AS | Maritime and Coastguard Agency (MCA) |
| ARCO British Limited | Maritime Partner AS |
| ASCO | Maritime Rescue Institute |
| ASCO UK Limited | Meridian Marine Management |
| Atlantic Offshore Rescue Limited | Mermaid Marine Australia Limited |
| BG Group | Mobil North Sea Limited |
| BHP Billiton (Australia) | Mobile Marine Technologies (MMT) |
| BHP Billiton (UK) | MSV International Limited |
| Bibby Offshore Limited | Nexen Petroleum UK Limited |
| Bibby Ship Management | Nomis Shipping Limited |
| Bluewater Services (UK) Limited | North Star Shipping (Aberdeen) Ltd |
| Boston Putford Offshore Safety Limited | Offshore Access Systems (OAS) |
| BP Baku | Offshore Marine Contractors |
| BP Egypt Company | Offshore Support Journal |
| BP Exploration Operating Company Limited | Oil & Gas UK |
| Britannia Operator Limited (BOL) | OPITO |
| British Gas E&P | OSM Ship Management AS |
| Britoil Public Limited Company | Panalpina World Transport |
| Brown & May Marine Limited | Perenco UK Ltd |
| Caldive | Petrofac |
| Cebo UK Limited | Petrofac Energy Developments |
| Centrica Energy Upstream | Petrogas E&P Netherlands BV |
| Centrica Storage Limited | PGS |
| CGGVeritas Services SA | PSE Kinsale Energy Limited |
| Chevron Exploration & Production Netherlands B.V. | Rederij Groen B.V. |
| Chevron Upstream Europe | Reflex Marine |
| Chriship AS | REM Offshore ASA |
| CNR International (UK) Limited | Rem Ship AS |
| ConocoPhillips UK Limited | Remoèy Management A/S |
| Crewing Services Aberdeen Limited | Santa Fe |
| Dacon Sub Sea | Sartor Offshore Management AS |
| Dana Petroleum Ltd | Sartor Offshore Rescue Limited |
| Deep Sea Supply Management (Singapore) Pte Ltd | Scottish Fishermen’s Federation (SFF) |
| Delta Power Services | Seabed Geosolutions JLT |
| Dolphin Geophysical AS | Seabrokers Group |
| Ecosse Subsea Systems Ltd | Seacor Marine |
| EDT Shipmanagement Limited | Seaforth Maritime |
| Emergency Response & Rescue Vessel Association (ERRVA) | Seletar Shipping limited |
| EnCana | Sentinel Marine |
| EnQuest Britain Limited | SFF Services Limited |
| EOG Resources UK Limited | Shell Onegas |
| EON | Shell U.K Limited |
| ER Offshore Management GmbH & Cie. KG | Siem Offshore Rederi AS |
| Esvagt A/S | Smedvig |
| ExxonMobil | Solstad Offshore AS |
| Fairfield Energy Limited | Swire Pacific Offshore (North Sea) Ltd |
| Falck Safety Services | Talisman Energy (UK) Limited |
| Farstad Shipping Limited | TAQA Bratani Limited |
| Fletcher Shipping Limited | Technip UK Limited |
| Flexlife Limited | The Safety Hub Limited |
| Fugro Seabed Seismic Systems JLT | Tidewater Marine |
| Gardline Environmental Ltd | Tidewater Support Services Ltd. |
| GDF Suez Exploration & Production Ltd | Total E&P UK Limited |
| Global Offshore Services Limited | Transocean |
| GloMar Offshore Wind Support B.V. | Trico Marine |
| Great Offshore Limited | Tullow Oil Company |
| Gulf Offshore NS Limited | Ulstein |
| GulfMark UK Limited | Ultra Electronics / SML Technologies |
| Havila Shipping A/S | UP Offshore (UK) Limited |
| Havila Supply (UK) Ltd | Vector Offshore Limited |
| Health and Safety Executive (HSE) | Venture Production (North Sea Dev) Limited |
| Helix ESG | Viking Offshore Services Ltd |
| Helix Well Ops (UK) Limited | Viking Standby Limited |
| HESS Limited | Viking Supply Ships A/S |
| HM Coastguard | Vroon Offshore Services B.V. |
| Hydrocarbon Resources Limited (HRL) | Vroon Offshore Services Limited |
| Integrated Marine Solutions | Vroon Ship Management S.r.l |
| Interocean | Well Ops (UK) Limited |
| KBR | Wood Group Engineering (North Sea) Limited |
| KD Marine Limited | Woodside Energy |
| Kerr McGee | WS Atkins |
