Very similar to Traveller in spirit (though I don't know how the mechanics compare). Do you remember more about how that worked in specific?
It's been a few years, but pretty much how I described. You rolled stats, then had the option to begin picking careers. Each career had an entry package, and a second and third term package. Certain careers required previous experience in another career.
For example:
US ArmyRank: Private
Gun skill at 6
Naviation at 3
Stats +1 to two or three different ones
Tactics at 4
2 Knowledges at 3 each
Cash 3d4x10
Age: +4 years
Special: None
2nd TermRank: Corporal
Gun skill +1
Stats +1 to one
Tactics +2
1 additional knowledge at 3
Cash 6d4x10
Age: +6 years
Special: None
Special Forces - Requires 2 terms in US Army
Rank: Major
Gun skill +2, specialized in Sniper Rifle at an additional +1
Stats +1 to four
Tactics +3
2 additional knowledges at 1
2 languages at 2
Cash 8d4x10
Age: +4 years
Special: May call in favors once an adventure for outside info.
The longer you progressed in one career, the smaller the skill returns, but the greater the side perks usually. You started at 16, and had to pick associates degrees, technical programs, bachelor programs, masters, military training, private business options (like private detective), or even options like Stripper.