In the oil & gas industry, the job of a completions engineer is to finish a well assembly after the completion of the drilling and lining. Your duties in this career are to monitor the well, identify any structural or geologic issues that might complicate the completion process, and draw up plans to install the rest of the equipment to facilitate the pumping of oil. You analyze, test, and record various features of the well, such as pressure and temperature, and design the proper system to deal with the specific conditions of different wells. Completions engineers work in both on- and off-shore drilling.