Black Cat - Black Cat is a former accoutant, turned theif.
Iceman - Bobby Drake is a Certified Public Accountant.
Wonder Man - Wonder Man is a famous actor, and even has a star on the Hollywood Walk of Fame
Thing - The Thing was a rocket pilot/astronaut, and piloted the rocket in which the accident that gave the Fantastic Four they're powers occured.
Strong Guy - Previous body guard for Lila Cheney
Angel - Rich businesss man, inherited his fortune from his father.
Emma Frost - Made her own way in the world, oener of Frost Enterprises.
Iron Man - Owner of Stark Industries.
Sunspot - Inherited his father's fortune.
Amanda Sefton - Part of a circus since she was born through her mother
Kingpin - For a long time, the Kingpin was the Crime Lord of New York City.
Cecilia Reyes - Celcilia was a doctor in a Bronx hospital. She is the only X-Man member that has so far been qualified in medicine.
Thor (as Donald Blake)
Wasp - Has her own fashion company.
Dr. Sarah Kinney
Iron Man - Invented many things for his company, Stark Industries.
Ben Urich - Previously reported for the Daily Bugle, now has his own paper with Sally Floyd.
J. Jonah Jameson
Black Panther - King of Wakanda
Captain Britain - King of the Otherworld
Doctor Doom - King of Latveria
Namor - King of Atlantis
Black Bolt - King of The Inhumans
She-Hulk - A very skilled lawyer, attended UCLA School of Law and Harvard Law School
Cannonball - Mutant powers first activated when he was in a coal mine earning money for his family.
Psylocke - Was a model before becoming an adventurer.
Dazzler - Famous singer in the Marvel Universe.
Lila Cheney - Famous singer in the Marvel Universe.
Annie Ghazikhanian (Annie) - Took care of Havok when no one knew who he was. For a time was the nurse at Xavier's Institute.
Spider-Man - Photographer for the Daily Bugle/The D.B.
Doc Samson - Has an M.D. in Pshychiatry.
Moonstone - Trained and qualified psychologist.
Professor X - Graduated from Oxford with a P.h.D. in psychology.
M - Member of X-Factor: Investigations.
Madrox - Member of X-Factor: Investigations.
Rictor - Member of X-Factor: Investigations.
Siryn - Member of X-Factor: Investigations.
Strong Guy - Member of X-Factor: Investigations.
Wolfsbane - Previous member of X-Factor: Investigations.
J. Jonah Jameson - Previous publisher of the Daily Bugle.
Storm - Queen of Wakanda.
Black Widow - Has SHIELD Level 10 clearance. One of three to have it.
Daisy Johnson - Has SHIELD Level 10 clearance. One of three to have it.
Dum Dum Dugan
Nick Fury - Has SHIELD Level 10 clearance. One of three to have it. Previous head of SHIELD.
Black Widow - Ex-Russian soldier.
Dr. Zander Rice
Colossus (Xavier Institute)
Iceman (Xavier Institute)
Beast (Xavier Institute)
Jean Grey (Xavier Institute)
Kitty Pryde (Xavier Institute)
Professor X (Xavier Institute)
Nightcrawler (Xavier Institute. No formal training.)
Tom Corsi (Xavier Institute)
X-23 (Xavier Institute in an Alternate Universe)