Full-time actuary; part-time law student; occasional professional singing gig
Topologist
That is, one of the mathematicians on the board. I don’t post much 'cause the others generally get it right.
To make a living, I’m a professor, an associate dean, and a textbook author.
I intern for my city’s Preservation department.
For the most part, I enter property listings into a database, which will eventually be put online.
In addition, I am a full-time college student (my major is in History).
Unemployed college student and ex pizza-slinger.
Varied jobs over the years.
Had a paper route as a real young’un.
Moved to being a pit monkey* at a movie theatre.
After that, usher and box office, same thatre.
Spliced into the movie job, worked as a sound tech for a touring musical.
Corner store clerk in an interesting neighbourhood.
Grocery store cashier.
Intern with the government.
Student (needed some education for a real job, damnit).
High Speed Internet Tech Support.
Travel Agent (still doing that but in a strange department of a multinational travel agency).
Oh the stories I could tell 
*We worked in the candy pit and looked like monkeys in the uniform.
I work in a factory that makes cardboard boxes. (And cardboard inserts for cardboard boxes. Also, those cardboard circles you find under frozen pizzas.)
On the down side, I’m always filthy with dust and ink at the end of the night. On the plus side, wearing torn, stained jeans and a torn, stained t-shirt is better than wearing a suit and tie to work.
Of the fair number of folks here that work directly with computers, I appear to be the only one specializing in information security. I’m a Level 3 analyst and administrator, which means I say “no” pretty often.
Other careers I’ve seen at the SDMB, but not mentioned in this thread are
Sunglasses salesperson
Barista
Museum curator
Motion picture camera operator
Machinist
Musician
College student, majoring in International Relations.
And indentured servant, er, convienence store clerk.
I had a job that as an electrical engineer I could wear a torn, stained t-shirt to work if I chose.
One day I was at a unrinal in the head at the Naval Air Systems Command (NAVAIR) Headquarters at Jefferson Plaza in Alexandria, VA. dressed in my usual casual manner. NAVAIR had a strict civilian dress code. If the Navy was in Class A uniforms civilians wore suit and tie. If the Navy was in shirts and ties, likewise civilians, etc. In walked Rear Adm. Foxgrover, Commander NAVAIR and took the urinal next to me. I noticed that he kept glancing at me and I thought maybe he was jealous, or something. I went over to the washbasin and he came over and said, “Do you work here, Sir?” “No, I’m from …” at which point he gave me a pained expressions that plainly said, “Well that explains why you’re dressed like a bum.” and walked out.
Resident Advisor at a large state school.
You naked kids get outa’ my hallway and off my lawn.
I work for an on-line sex zine that promotes safe(er)-sex, sexuality, lifestyles, understanding of lifestyles, education, coverage of events, reviews (of toys, books, - you wouldn’t believe the freebies I get). I am a professional journalist with over 200+ bylines to my name which isn’t bad for a bi-weekly publication. I love my press pass. I have over 200,000 unique hits on my name and articles per day. I’ve been asked as an authority on several different topics by other print publications, television shows, and authors.
I write about sex. As such, I have to try a lot of different things so I can try to write from an understanding of the audience - of course there are some impractical generalities that go along with this, but I do my best.
I like what I do. Most of the time. But I’ve seen enough porn that it makes me laugh, interviewed enough “celebrities” whom I now realize were hired for assets and not talent or mental ability, and I’ve tried enough toys that were just CRAP. I don’t write about those. We just try to write about the good ones.
So, that’s me. I don’t know for how much longer, but it’s me now, and has been for over three years. I won’t be ashamed of my job if I ever go into the market again cause I’ve done some damn god writing and investigative journalism. The only thing I hate is that I can’t discuss 2257 and Gonzales because we’re trying to fly under the radar at the moment. Anyone else hear of Max Hardcore and how his offices were “raided” with SHOTGUNS shot off through the floor?
Politics is a bitch. But I am a member of the Free Speech Coalition and their fight, and Barbara Nietze (sp?) and her fight as well. Slippery slope guys.
Off the soapbox now.
Inky
Computer programmer, slot machine software. Formerly debit card terminals and processing systems, before that, BBS Software (Major BBS/Worldgroup, anyone?)
I don’t gamble.
I run a small (30 - 35 person) computer software company specializing in retail point of sale software. My own background: a degree and PhD in Biochemistry, then took a job as a computer programmer.
I’m one of the linguists (still in school, yes, but have a few papers to my name). Specifically, I’m a sociophonetcian, which is the unholy melding of sociolinguistics and phonetics. My SO, who occasionally uses my screename, is a mathmatician, specifically a set theorist. We have fights over whose specialty is more useless in the real world.
Professional do-gooder. I work for a non-profit organization that provides vocational, residential, day programs, respite and family support services to persons with disabilities. I’m also the rules/regs/policies/procedures sob. Everybody loves me. 
Cool! I worked at a box factory for a little over a year myself. We made pizza boxes (Pizza hut, IMO’s, Breadeaux, etc), FedEx boxes, Schwinns boxes, and several other types as well. I remember those dirty and hot days and nights.
Oh, unemployed student at the moment.
Telecom Project Manager here. I design and oversee the construction of data centers, fiber optic cabling (both inside plant and outside plant), and wireless data transmission facilities (towers and radio sites).
Mainframe computer applications programmer for the past seventeen years. In the more-distant past I have been: a truck driver, professional rock guitarist (I still play professionally, part-time), a technician in a venom lab (I extracted venom from snakes, toads, spiders and scorpions), a car salesman, a construction worker, a security guard, an HVAC installer, a printing press mechanic, a printing salesman and a warehouse manager.
Approximate summary #2, complete with inconsistent choices for level of detail!
actuary
administrative assistant
aircraft functional test technician
architect, esp. multi-family highrise
artist, comic book backgrounds
assembler, aircraft factory
auditor, internal
author
backflow device tester (water processing)
bank manager
barista
bartender
biochemist
biologist
blood donation worker
brewer
broadcasting, various
broadcaster
butcher
cartoonist
caterer
chemist
clerk, cinema
clerk, grocery store
clerk, hardware store
clerk, occupational health and safety
clerk, various
columnist
computer scientist, various
construction worker
construction superintendent
contractor, HVAC/electrical/plumbing
contractor, residential
copyeditor
counsellor, career
courier, confidential
crafter
cross-connection control (water processing)
curator, exhibitions
curator, museum
debate coach
distribution operator, drinking water
dog washer
draftsman
delivery driver, FedEx
delivery driver, pizza
dietary assistant (hospital)
dormatory director
editor, various
electrician
emergency medical technician
engineer, aeronautical
engineer, electrical
engineer, mechanical
English language instructor, overseas
environmental scientist
facilities manager
factory worker, cardboard boxes
factory worker, trucks
farmer
fast food worker
financial journalist
firefighter
forensic scientist
forklift driver
frycook
furniture builder
gemologist
geologist
geophysicist
hazardous materials technician/driver
homemaker
horse rancher
hotel manager
house painter
industrial supply CSA
information security specialist
information technologist, various
journalist, sex articles
journalist, various
kiln fireman
knit designer
lawyer
licensee, Series 6 NASD
linguist
librarian
machinist
mathematician, set theory
mathematician, topology
mathematician, various
mechanic, automotive
mechanic, HVAC
mechanic, printing presses
medical billing specialist
medical laboratory technologist
minister
mother
music teacher
musical instrument designer, MIDI
musician, bagpiper
musician, guitarist
musician, organist
musician, vocalist
network administrator, Level III
network technical analyst
news editor
news correspondent
newspaper deliverer
non-profit worker
numismatist
nurse
ornithologist
paramedic
pension specialist
personal banker
pharmacy technician
photographer
physical oceanographer
physician, emergency medicine
physician, family practice
physician, psychiatry
physicist, general relativity
physicist, particle
pilot, airline
pilot, cargo
pilot, instructor
poker player
police officer
political aide
portfolio manager
postal carrier
postal clerk
pricing analyst
producer, broadcast television
production control planner
professor, mathematics
professor, philosophy
professor, English
projectionist
proofreader
psychologist
publishing executive
puzzle editor
quality assurance technician, brewery
quality assurance technician, diary manufacturing
quality assurance technician, high tech manufacturing
ranger
resident advisor (college)
robotic assemblyline engineer
rodeo clown
sales assistant, various
salesperson, automobiles
salesperson, sunglasses
salesperson, weight-loss plans
search algorithm designer
secretary
security guard
serviceman, US army, sargent
servicemen, various
software developer, debit card processing
software developer, slot machines
software developer, user interface
software developer, various
sound engineer
stablehand
store owner, tires
store owner, toys
student, various
teacher, elementary
teacher, post-secondary, various subjects
teacher, secondary, various subjects
technical writer
telemarketer
theater technician
traffic engineer
train conductor trainee
translator, French to English
trapper, feral cats
travel agent
truck driver
union organizer
urban planner
veterinarian
venom lab technician
waitor/waitress
warehouse manager
winemaker
Well, I must be the one cop. I thought there were a couple of others.
I’ve been a cop for 18 years, doing most of the possible assignments in a small agency. Before that I had a variety of jobs, as well as being a vounteer firefighter/EMT.
As as sideline, I’m a UFO ivestigator (I’ll have to start a "Ask the . . . " thread about this eventually.