|   | GUE Instructor Trainers (IT) | 
| (ITs can offer only the first endorsement during instructor development) | 
| Thomas Jonsson | Recreational 1, 3, Fundamentals | 
| Dorota Czerny | Tech 1 | 
| JP Bresser | Cave 1 | 
| Gunnar Midtgaard | Tech 1 | 
| Derk Remmers | Recreational 1, 2, 3, Fundamentals, Tech 1, CCR Tech 1 | 
| John Kendall | Fundamentals, CCR Tech 1 | 
| Fred Devos | Recreational 1, Fundamentals, Cave 1 | 
| Kyungsoo Kim | Tech 1 | 
| Henning May | Recreational 1, Fundamentals | 
| Martijn Blommaert | Recreational 1, 2, Fundamentals | 
| Annika Persson | Fundamentals | 
| Jin Hui | Tech 1, CCR Fundamentals | 
| Meredith Tanguay | Fundamentals | 
| Nuno Padrao | Recreational 1, 2, Fundamentals | 
| Peter Gaertner | Recreational 1, 2, Fundamentals | 
| Andrew Couch | Recreational 1, Fundamentals | 
| Duncan Paterson | Fundamentals | 
| David Lee | Tech 1 | 
| Mark Devoldere | Recreational 1, 2 | 
| Anne-Marie Bresser | Recreational 1, 2, Fundamentals | 
| Osama Gobara | Cave 1 | 
| Francesco Cameli | Recreational 1, 2, Fundamentals | 
| Lauren Wilson | Recreational 1, 2, Fundamentals | 
|   |   | 
|   | GUE Instructor Evaluators (IE) | 
| (IEs can provide either the first or second  endorsement during instructor development, but never both)  | 
| Chris Le Maillot | Fundamentals, Cave 1, 2, SM, DPV 1, DPV Cave | 
| Gideon Liew | Recreational 1, 2, 3, Fundamentals, DPV 1, Tech 1, 2, Gas Blender | 
| David Rhea | PSCR, Cave 1, 2 | 
| Danny Riordan | Recreational 1, 2, Fundamentals, DPV 1, DPV Cave, Cave 1, 2 | 
| Richard Walker | Recreational 1, 2, 3 Fundamentals, DPV 1, Tech 1, 2 | 
| JP Bresser | Recreational 1,2,3, Fundamentals, Documentation Diver, DPV 1 | 
| Dorota Czerny | Recreational 1, 2, 3, Fundamentals, DPV 1 | 
| Kirill Egorov | Recreational 1, 2, 3; Fundamentals; DPV 1; Cave 1, 2, SM; Tech 1, 2; CCR Fundamentals, Tech 1, Tech 2, Cave | 
| Fred Devos | Underwater Cave Survey | 
| Mark Messersmith | Fundamentals, DPV 1 | 
| Gunnar Midtgaard | Recreational 1, Fundamentals | 
| Graham Blackmore | Recreational 1, 2, 3; Fundamentals; DPV 1; Tech 1,2; CCR Fundamentals, Tech 1, Tech 2 | 
| John Kendall | Recreational 1, 2, 3, Gas Blender, Photogrammetry, CCR Fundamentals | 
| Irene Homberger | Recreational 1, 2, Fundamentals, DPV 1 | 
| Diogo Paulo | Recreational 1, 2, Fundamentals, Scientific Diver, DPV 1 | 
| Meredith Tanguay | Recreational 1, 2 | 
| David Lee | Recreational 1, 2, 3, Fundamentals | 
| Kyungsoo Kim | Rec 1, 2, 3, Fundamentals, DPV 1 | 
| Ricardo Constantino | Recreational 1, 2, Fundamentals | 
| Gemma Thomas | Recreational 1, 2, Fundamentals | 
| Annika Persson | Recreational 1, 2 | 
| Jin Hui | Recreational 1, 2, Fundamentals, DPV 1 | 
| Derk Remmers | CCR Fundamentals | 
| Liam Allen | Rec 1, 2, 3, Fundamentals |