Orbital engineer
An orbital engineer was an engineer who specialized in the application of engineering science and technology to objects used or associated with a planet's orbit. 

While posing as a crewman aboard ,  claimed that he had a brother who was an orbital engineer at Jupiter Station. When it was later revealed that he was actually a time traveler from the future, he told Charles Tucker that he did not actually have a brother. ()

The ability to maintain operation of orbital tethers was within the confines of the skills possessed by an orbital engineer. When Lillias was having trouble attempting to get a power relay of a mag-lev carriage on line, in 2372, she said "I'm not an orbital engineer. I can't do this." Fortunately Neelix, who had some experience with such technology, was able to help her by recalibrating the pressure valve. ()

Scientific occupations