According to her tombstone, she was born in 1966, and died in 2003.

Sadiq (Omi Vaidya) does tech support. First appearing in "E-mail Surveillance", he is sent by management to teach Michael how to monitor office email. Sadiq attends Jim's barbecue (to the consternation of Michael, who wasn't invited and still doesn't appear to trust Sadiq's motives). In "Fun Run", Sadiq cleans a computer virus from Pam's computer. He is a Sikh but resents being only Classified by his religion, telling a meeting during "Fun Run" that he likes listening to hip hop and National Public Radio, and is restoring a 1967 Corvette. When the company is acquired by Sabre, Sadiq presumably loses his job, as a new IT Technician, Nick, takes his place. Dwight tells Sadiq's angrily departing successor Nick that they liked Sadiq for two reasons: he kept to himself, and they were afraid to cross him because they thought he might actually be a terrorist.

During a 2007 Writer's Block Question and Answer session at The Office Convention, the Writers half-jokingly suggested that the original reason for the camera crew filming the staff's lives was to see how the Dunder Mifflin Scranton branch handled the suicide of a co-worker (that employee being Tom Peets), but the crew changed its focus upon realizing that the daily events in the office would make a more captivating documentary.

In a 2008 Office Comic Con panel, it was revealed that Fern is gay, as Writer Lester Lewis stated that he portrayed the character's boyfriend, but his part was cut.

Matt (Sam Daly) works at the Dunder Mifflin warehouse. It is presumed that he started work there shortly before December 2009. It is revealed in "Secret Santa" that Oscar secretly has a crush on him, and that Matt is also gay. Pam spends the whole Christmas party trying to get Oscar and Matt to bond. In the episode "Happy Hour", Oscar invites the warehouse crew and the office to drinks in an effort to hang out with Matt. The only real interaction between the two is when Matt invites Oscar to play basketball with him which Oscar gladly accepts despite the fact that he is terrible at basketball, confirming Darryl's accurate impression that Matt has nothing in Common with Oscar. After that point, Matt does not appear in the show anymore.

In a deleted scene from the next episode, she is upset that Jim is now acting awkwardly around her, though a talking-head interview shows that she is still under the delusion that she has a chance at a romantic relationship with him. In a subsequent interview with the object of her affection, Jim tells the camera crew that he thinks she is "crazy". However, in "Last Day in Florida", it appears that she may no longer care for Jim, as she laughs along with Dwight when Dwight repeatedly insults him (although, it is also possible that she was only doing this because Dwight was Vice President to Nellie Bertram at the time). She is not shown returning from Florida with her co-workers, and in the next episode, her desk appears to be cleaned out. On March 19, 2012, Broad confirmed that Cathy would not be returning, stating, via a Twitter message, that "Cathy has finished [temping] at Dunder Mifflin".

In "Branch Closing", when it was announced in that the Scranton branch would be closing, Josh was offered a promotion to become the manager of Dunder Mifflin's newly formed Northeast region. However, he leveraged the offer to obtain a senior management job with Staples, throwing plans for the Scranton closing into disarray. As a direct result of Josh's decision to leave the company, it was decided to close the Stamford branch instead. Disgusted, Jim later says of Josh's double-dealing, "Say what you will about Michael Scott – but he would never do that".

Charles Miner (Idris Elba) appears in the fifth season, as the Vice President of Northeast Sales for Dunder Mifflin, having taken over the position vacated by Ryan and Jan. Before coming to Dunder Mifflin, he was previously employed by Saticoy Steel, and came from an accounting background. He is introduced in the episode "New Boss", where his no-nonsense management skills clash with Michael's laid-back demeanor, and upon meeting Jim, immediately develops a dislike towards him. His no-nonsense attitude causes both Angela and Kelly to develop an immediate attraction to him, later stating that "(he) was aware of the affect he had on women" and wasn't interested in pursuing either of them. Charles soon causes Michael to quit after Charles cancels a party celebrating Michael's 15th anniversary with the company. In "Broke", fretful over Michael's new company poaching several clients, Charles meets with David Wallace at the branch, and shamelessly sucks up to David, which Jim notices. Charles vocalizes his disdain when David asks that Jim be present at a meeting, as he thinks of Jim as "a disappointment", but soon finds out, under embarrassing circumstances with Dwight, that Jim is smarter and much more professional than he believed him to be. This soon prompts Charles to immediately turn to Jim over Dwight during negotiations with Michael. When Charles tries kissing up to Wallace again, Jim publicly corrects him in front of his boss, leaving him speechless. When Michael is later re-hired in the episode, he demands that Charles be fired, but David refuses, stating that Charles is "valuable". Charles does, however, leave Scranton and return to corporate headquarters. Upon his departure, he tries to say his parting words, but Michael cuts him off, mirroring Charles's earlier treatment of him. Charles reappears in "Company Picnic", where he is again condescending to Jim and heavily competitive in the volleyball game against the Scranton branch. However, it is also confirmed that Charles no longer has any authority over the Scranton office.