A 'one shot' canon character that has been given greater development (particularly as he makes the jump from enlisted to officer is Simon Tarses.
His only canon appearance in The Drumhead (supported by a reference in the pre-TrekLit novel Infiltrator) suggest that he was/would be removed from Starfleet. However, other pre-TrekLit sources suggest that he serviced a suspension and returned to the E-D for a time, then was sponsered/recommended/encouraged to attend the Academy by Captain Picard and returns to the E-D as an ensign (MB suggests as a nurse, but science officer is also possible given he's never referred to as such). Between 2371 and 2376, he returns to Starfleet (Medical) Academy and qualifies as a doctor (specialising in nano-tech/cybernetics & genitronics) and is posted to DS9 (I) as a staff physician (and briefly Acting CMO), and within the year he was transferred to USS Aventine as CMO.
At this point he is believed to be around 32-33 Earth Years old and holds the rank of Lieutenant after 14-15 Earth Years service.
My question is: How common is the above (minus the suspension) likely to be for non-Command officers (engineers, doctors, scientists) to 'come up from the ranks' rather than entering as civilians.
His only canon appearance in The Drumhead (supported by a reference in the pre-TrekLit novel Infiltrator) suggest that he was/would be removed from Starfleet. However, other pre-TrekLit sources suggest that he serviced a suspension and returned to the E-D for a time, then was sponsered/recommended/encouraged to attend the Academy by Captain Picard and returns to the E-D as an ensign (MB suggests as a nurse, but science officer is also possible given he's never referred to as such). Between 2371 and 2376, he returns to Starfleet (Medical) Academy and qualifies as a doctor (specialising in nano-tech/cybernetics & genitronics) and is posted to DS9 (I) as a staff physician (and briefly Acting CMO), and within the year he was transferred to USS Aventine as CMO.
At this point he is believed to be around 32-33 Earth Years old and holds the rank of Lieutenant after 14-15 Earth Years service.
My question is: How common is the above (minus the suspension) likely to be for non-Command officers (engineers, doctors, scientists) to 'come up from the ranks' rather than entering as civilians.