Offshore diving jobs focus on diving to install or repair underwater structures. Your duties in this career include working to inspect, maintain, or fix the sub-surface parts of oil rigs. Though an offshore diver typically works in the oil and gas industry, you can also perform diving responsibilities in other sectors, such as shipping. You can also repair offshore structures, such as bridges, cables, and pipelines. In this career, you typically work with tools and equipment like welding tools or saws, so you need to be skilled enough with this equipment to perform your duties while wearing scuba equipment.