Chief Niles Caulder
69 years ago - Niles Caulder is born.
53 years ago - 16-year-old Caulder begins college.
50 years ago - 19-year-old Caulder graduates & begins a series of postgrad studies.
48 years ago - 21-year-old Caulder is hired by Vandal Savage to replicate his immortality effect. When he realizes what his work will be used for, Caulder manages to escape, but the resulting explosion leaves him in a wheelchair. He is subsequently subtly effected by Savages immortality effect, subtly reducing his aging.
43 years ago - 26-year-old Caulder is called upon to save the life of Cliff Steele, and does so by creating Robotman.
41 years ago - 28-year-old Caulder earns his first Doctorate & begins the Caulder Foundation.
29 years ago - 40-year-old Caulder saves Larry Trainer's life, creating Negative Man.
24 years ago - 45-year-old Caulder saves Rita Farr's life, creating Elasti-girl. To give purpose to her life, as well as the lives of others he's saved, he creates the Doom Patrol.
17 years ago - 52-year-old Caulder "dies" with the rest of the Doom Patrol, washing up on tiny pacific island with amnesia.
11 years ago - 58-year-old Caulder is found by the reformed Doom Patrol, who help return his memories.
6 years ago - 63-year-old Caulder takes the Doom Patrol into Quaroc for Gar Logan, where they manage to find Toni Monetti & Karen Beecher. Caulder saves Karen's life from her fluctuating powers, and takes her into the Doom Patrol.
2 years ago - 67-year-old Caulder recovers Rita Farr's body & manages to bring her back. He is later killed by Prometheus.
The original run of the Doom Patrol is a stylish slice of pulp entertainment, and ended with a literal bang when the team sacrificed their lives together in an explosion at sea. After that, the team's various returns were marked with a penchant for retroactive rewrites, having whole chunks of their story removed from character's memory without much explanation. The continuity minefield the team had become provided ample fodder for Grant Morrison's seminal run on the team, making them a true work of Dada art in comic form.
One of the most prominent elements to be retroactively altered in the Doom Patrol is the very nature of the Chief himself. He was a distant, mysterious authority figure that had saved the team's lives, turning them into freaks who were also heroes. There was admittedly a sinister notion to it, but it wasn't until later that it was decided that he had actually CAUSED the accidents that had created each member of the Patrol. This idea has been bounced back and forth from writer to writer for a long time, but in a team when even the very simple question of 'what is actually going on here?' is a tricky one, nailing down the Chief's true motivation has never been an accomplishable task.
The Doom Patrol is the DC equivalent of the X-men, and Chief is their Professor X. He's a reclusive genius whose medical expertise has been called on to save people in horrible accidents, and has occasionally had to do some unorthodox, perhaps even unethical things with some of his patients, and he now spends his fortune to give his patients a home and a purpose, and to try to make the world a better place.