This placement tends to do best where work is measured by quality of execution rather than the noise around the result. Medicine, especially fields with fine handwork — surgery, dentistry, ophthalmology. Engineering and design, where a slip in the drawing costs a fortune. Programming, particularly code review and testing. Editing and proofreading, where Mars in Virgo tends to catch the error faster than anyone else in the room.
High-end craft suits it too. Jewellery, restoration, watchmaking, bookbinding, hand-built joinery — anything with a material, a tool and a result you can measure across thousands of hours of practice. This placement tends to carry monotony and long learning cycles well, the very ones that burn other people out by the third year.
In a corporate setting, this person most often lands in the role of head of operations, technical director or chief engineer. Not the public face of the company but the one who holds the processes together. Influence comes through being hard to replace and through reputation, not charisma. It often turns out that without this specialist the project stalls, even while other people are standing on the stage.
Where it works least well is anything that calls for constant improvisation with no run-up. Cold-call sales, crisis management lived around the clock, the chaos of show business with its dependence on the mood of a crowd. Not because the person can't cope — they can, but the cost tends to run too high. The body and nervous system of this placement aren't built for life in a permanently unplanned mode. In my experience, the happiest Mars in Virgo careers tend to be built over the long haul in one field, with deep immersion and a steady climb in mastery.