Well done on getting a start. Cant really help you with info about Deepocean.
Regarding training, there is no such qualification as an ROV pilot, or industry accreditation. IMCA are a trade organisation, a group of companies who got together and devided some standards.
Despite this each company can still train different ways. E.g. IMCA recognises Rov pilot tech 1 an 2 levels, but many companies gave lrbels 1,2,3,4 etc.
You really do not need to worry about getting formal training. You will be taught what you need to know to operate and maintain their equipment.
You will after this have Rov experience to add to your CV which is worth a lot more than formal qualifications.
