The answer is yes. But I'd look into the process: EASA might not recognise an SIC type rating. If you have the ATP with 500 hours on type and a PIC type rating you just need to take the exams and do an LST in a SIM. You'll get a full EASA ATPL and type rating. If you don't meet those requirements then as mentioned above it'll be a lot harder and a lot more expensive. You'll need to do a full ground school course, then the exams, then at least 20+ hours flight training, 2 flight tests and you'll still only have a CPL/IR. You'd then need to do a full type rating course and LST to get the type rating (or wait until you have 500 hours on type to skip the course)