Log in and register here:-
http://powerandmotoryacht.com/
get on the forum and have a chat with some of the guys. Was offered 2 jobs by doing that. I also wanted to be engineer/pilot. Had all relevant STCW + JAR certs etc but they do expect you to have at least 1000hrs and type rating already. 355/EC120/130, plus you might end up doing fairly long trips with very little flying.
Good Luck