Considered to be a know-it-all by many of his co-workers, Oscar is frequently exasperated by the antics of the office, though he often joins Kevin Malone in antagonizing uptight Angela Martin.

He replaces this with a Lexus RX 400h, a company car leased to him as part of Dunder Mifflin's desire to avoid a lawsuit after the events of "Gay Witch Hunt".

During the 2006–2007 season, the Gay & Lesbian Alliance Against Defamation (GLAAD) reported he was the only LGBT person of color character on a regular series.

In this episode, it is revealed that he is gay, and Michael Scott's mishandling of the situation (including kissing him without consent) leads to Dunder Mifflin offering Oscar a paid vacation and company car to avoid a lawsuit.

An exception is fellow accountant Angela Martin, whose conservative Christian views lead her to react to Oscar with extreme bigotry at first.