Quentin Beck was a former special/visual effects designer hired by Oscorp Industries to work on the visual graphics for their computer-animated commercials. Despite his high earning for computer work, Quentin still wanted more physical recognition for his work and tried to become an actor but failed due to his horrid acting skills.
Beck wouldn't get his opportunity until being approached by agents of the Master Planner, a mysterious crime lord operating in New York, to utilize his visual FX talents for crime as part of the Master Plan. Accepting the offer out of a sense of pride, he built for himself an armored suit equipped with holographic projectors and other numerous mechanical devices, and adopted the persona of a mystical sorcerer by the name of Mysterio.
Beck has since gone on to be recruited into the Sinister Six initiative at Oscorp Industries to counteract S.H.I.E.L.D.'s Avenger Initiative.
Beck was a master of make-up, physical stunt work, mechanical and visual special effects. He knew basic psychiatry and could employ his knowledge to hypnotize successfully. He also learned a great deal of applied chemistry, especially the use of hallucinogens, and electronics. Beck was a meticulous planner and organizer, and an actor who kept himself in top physical form. Beck mainly uses his experience in the film business to create elaborate traps, illusions as well as other such cons in order to trick his opponents.