I worked in Sembawang Shipyard as an engineer for a couple of years after I graduated. Some facts:
1. Be ready to work on most of the Sundays and Saturdays because the refitting schedule is round the clock to maximize the berth/dock capacity. You can claim overtime but it is capped.

2. It is a physically demanding because ships are so big. You have to climb up that staircase aka gangway from the ground to the ship, and also down to cargo tanks that are five to six storey high. Not to mention toiling under the hot sun.

3. The turnover rate is high due to the work nature. Go search in jobsdb and you know what I mean.

4. But it is a good place to learn and toughen yourself. There is a saying that "If you can survive in the shipyard, you can survive anywhere"

So if you are a family person who enjoy sitting in air-con room, this job is not for you. But if you want to stretch yourself and Learn the most in the shortest time....go for it.