Career
Reporter
Not finding what he needed at college, Mohan dropped out and decided to be a writer, finding a job as a reporter for the Lake Geneva Regional News. After a few months, he joined the staff of the Beloit Daily News. Over nine years, Mohan worked as everything from a sports writer, an editorial writer, the state editor, and the wire service editor. After nine years, he left the newspaper business to become a freelance writer for various newspapers.
TSR
In the summer of 1979, at the age of 30, Mohan went to the TSR Periodicals headquarters in Lake Geneva, Wisconsin. After completing an interview and some test freelance editing assignments, Mohan was hired by TSR as part of a three-man staff. Mohan was soon promoted to assistant editor of Dragon magazine, and became editor-in-chief with issue #49 (May 1981). : 13 Mohan also worked on other TSR projects: he was the co-designer of the TSR board game Food Fight, performed managerial duties for Strategy & Tactics and Amazing Stories magazine, served as editor and "general handyman" for the Unearthed Arcana rule book, authored the Wilderness Survival Guide rulebook, : 17 and edited Saga of Old City (Gary Gygax's first novel).
New Infinities Productions
In late 1985, Gary Gygax lost a boardroom struggle for control of TSR and left the company, forming rival company New Infinities Productions. Mohan and Frank Mentzer both left TSR to join Gygax at New Infinities. : 237 While there, Mohan was the author of the Cyborg Commando sequence of novels with Pamela O'Neill. Based on an outline by Gygax, the trilogy included Planet in Peril (1987), Chase into Space (1988) and The Ultimate Prize (1988). However, New Infinities was unable to procure enough outside investment to survive until their various projects came to market, and the company failed in 1989. Luke Gygax, son of Gary, later wrote, "[He] left TSR and went to work with my Dad because he believed in him and his capabilities. He did that at great risk to his family and it was a gamble that didn't pay off."
Return to TSR
Following the closure of New Infinities, Mohan returned to TSR and became editor of Amazing Stories (1992–2001), : 239 receiving several Locus Poll Award nominations for "Best Editor" and "Best Magazine or Fanzine".[citation needed] He also became editor of Dragon again from 1993 to 1995.[citation needed]
Wizards of the Coast
In 1996, TSR ran into financial difficulties, and was taken over by Wizards of the Coast (WotC) the following year. Mohan agreed to stay on, and became the lead editor of the 3rd edition of Dungeons & Dragons. He was then promoted to managing editor during the second half of the design stage (with Julia Martin finishing the project).
Mohan appeared in the 1999 History Channel special In Search of History: The Truth About Science Fiction, which featured Harlan Ellison and Larry Niven in a discussion about science fiction literature and movies.