Robert California, also known as Bob Kazamakis, is a fictional character on the American comedy television series The Office, portrayed by James Spader. In the eighth season, Robert managed to persuade Jo Bennett to appoint him CEO in her place. In the eighth-season finale, Robert departs from the company after David Wallace purchases Dunder Mifflin.

California is an original character and has no counterpart on the original British version of the series.

Robert first appeared in the seventh season finale, "Search Committee", as an interviewee for the Scranton branch Manager position. His intense personality disturbs the search committee, though Jim Halpert admits that, while Robert "creeps [him] out", he believes he "might be a genius". In a talking-head interview held in the parking lot, Robert informs the documentary film crew that he is confident that he will be offered the job.

In the season 8 premiere, "The List", it is revealed that Robert was hired as the branch manager over the summer. But, after one look at his new workplace environment, he quickly drives to Florida and convinces Sabre CEO Jo Bennett to give him her job. Once CEO himself, he appoints Andy Bernard as the Regional Manager. Jim notes that when Robert visits the office, he spends half of his time working out of the conference room, and occasionally ventures out and wanders around, randomly choosing employees to have conversations with. Robert makes a list of all the workers in the office, dividing them between perceived "Winners" and "Losers"; after finishing the list, he takes the winners out to lunch. When confronted about the list, Robert states that those are his impressions, and they could change, challenging the office with: "winners: prove me right; losers: prove me wrong". Andy later intercedes on behalf of the 'losers', making a new list on his team of 'winners' relaying their positive and productive qualities observed over years in the office and from being their supervisor; Robert appears to gain respect for Andy's effort, as it unites the office around him. Andy begins trying to get on Robert's good side, and he organizes a garden party at Schrute Farms during "Garden Party", to impress him.

In "Spooked", Robert's young son, Bert, is introduced; Robert brings Bert to the office Halloween party. Robert's wife, Susan (Maura Tierney) is introduced in "Mrs. California"; Susan comes to the office looking for a job, something he does not want, although he pretends to help her out. Andy ends up giving her an accounting job, enraging Robert. Andy then gets the staff to be mean to her to urge her to quit. She ultimately catches on and confronts Andy and her husband. At the end of the episode, Susan asks Andy on a date. In "Christmas Wishes", it is revealed that Robert and Susan are getting a divorce, prompting him to become despondent and lonely. At the branch Christmas party, Robert comforts Erin, who is upset over Andy's new girlfriend. Robert decides to sell his mansion following his divorce, and at Kevin's suggestion, throws an office pool party as a last hurrah.

Robert appears in "Last Day in Florida", accompanying Dwight, Jim, and Nellie Bertram on a golf outing celebrating Dwight's new vice president position. After playing, Robert stuns Jim by revealing that he dislikes the business plan for the Sabre store, and that he had only approved of it because Jo wanted it. But with the knowledge that Sabre products are inferior and will illuminate the fact that the store is a failure, he plans to sandbag it at a high-level meeting of the Sabre company board, and also strongly hints that, despite liking Dwight, he is going to fire him over it. Later, after Jim stops Dwight from attending the meeting, Nellie appoints Todd Packer as vice president in his place. During the meeting, Robert chastises Packer for the failure of the store, pretending that the Sabre store itself was a great concept, but that Packer botched in execution. While Packer protests that he has only been vice president for half an hour, and that Dwight is to blame, Robert commends Dwight for being smart enough not to show up at the meeting, and terminates Packer. Robert later allows Nellie to have a job at the Scranton branch; Nellie declares herself as the new manager, despite the fact that Andy is already employed as Regional Manager. At Nellie's welcome party, Robert makes very obvious attempts to make a good impression on her.

In "Angry Andy", Andy enlists Robert to give him his job back from Nellie by claiming it was an interim position for her. Nellie refuses, but manipulates Robert by flirtatiously hinting that she is attracted to him. Robert then stays detached from their conflict until Andy has an anger outburst, in which he throws his chair at Robert and then punches his hand through the wall over Nellie stealing his job. Robert then chooses Nellie as the branch Manager and fires Andy.

In "Turf War", while celebrating the finalization of his divorce, Robert drunkenly shuts down Dunder Mifflin’s Binghamton office, leaving the other branches to fight over their clients. Meanwhile, Andy decides to land an important Binghamton client as a "rogue" and jumpstart his Dunder Mifflin comeback by using his success as leverage with Robert. After Nellie reveals to Robert that he sent her a sexually suggestive voicemail, Robert tasks Pam to find out what the voicemail entailed. Pam manages to steal her cellphone, however, as Robert goes through Nellie's messages, Pam relents and tells Robert that she will not help him anymore. The two struggle over the phone, but Pam manages to delete the messages before Robert can hear his voicemail. Later, Andy calls Robert, after having stolen his largest client, and offers him the client back if Robert will rehire him. Meanwhile, Jim and Dwight talk with Harry Jannerone, an employee from the Syracuse branch, who predicts that Robert will ruin the company within six months.