Tinkerer's first known job was when he helped Quentin Beck masquerade as an alien. Over the following years he constructed or improved the weapons and equipment of various super-villains, including Whirlwind, Grim Reaper and Trapster, as well as the villainesses turned superheroines Diamondback and the Black Cat.
Ironically and unfortunately, while out buying ice cream for his grandchildren, the Tinkerer was arrested for not registering under the Superhuman Registration Act despite being retired and no longer active. He was not given a fair trial and was sentenced to prison in the Negative Zone during the Civil War.
He apparently escaped, but was apprehended by Spider-Man and Iron Man and charged for having black market connections by selling illegal superhero equipment.
When Lyja transported the Baxter Building into the Negative Zone as the Secret Invasion began, the Human Torch and The Thing sought out the Tinkerer's aid to rebuild Reed Richards' portal generator so that they could return to Earth and fight the Skrulls. However, the former villain refused, stating that he lost his family when he was arrested and saw nothing to gain from aiding the heroes. Franklin pleaded with the man, saying that his father would not have supported the arrest of the Tinkerer because he was a good man and begged for help. The Tinkerer was moved to tears by the young boy's plea and agreed to aid them. He, along with Grimm, Storm, Valeria Richards, and Franklin returned to Earth in the war-torn New York City.
Scientific Genius: The Tinkerer possesses extensive knowledge in a wide variety of scientific disciplines, as well as a high degree of expertise in designing and manufacturing innovative weapons and devices, even by using parts from pre-existing devices as unsophisticated as a color television set or an automatic gun.
Normal human male with minimal regular exercise.
Paraplegic: Under unknown circumstances, the Thinkerer was rendered paraplegic, possibly due to spinal damage.