- "You're fired, Elaine. Goodbye."
- ―Justin to Elaine
Justin Pitt, usually called Mr. Pitt, is Elaine's eccentric boss during Season Six. He is an executive at Doubleday publishing company and hired Elaine to be his assistant solely because she reminded him of Jackie Onassis when they first met, sometime after Pendant Publishing went out of business. However, he is rather obsessive-compulsive often had her do rather trivial work for him, including spending hours finding the perfect pair of socks, removing salt from his pretzel sticks, sharpening pencils, and winning a ticket for holding a rope for the Woody Woodpecker balloon at Macy's Thanksgiving Day parade. He also has the unusual habit of eating Snickers bars with a fork and knife.
In "The Diplomat's Club," Justin was going to put Elaine in his will, claiming she was like a daughter to him. He and Jerry Seinfeld met at the Pharmarcy, but he fires her after he and his attorney suspect Elaine and Jerry are trying to kill him.
He shows up in court in "The Finale, Part 2" to testify against Elaine where he again claims Elaine and Jerry tried to kill him, and even claims that Elaine tried to smother him with a pillow. A deleted scene prior to this accusation had him mentioning how he hired Elaine, where she worked for him for September 1994 to May 1995. When Elaine shouted to Justin that his claim she tried to smother him with the pillow wasn't true, Judge Arthur Vandelay banged his gavel. When asked by District Attorney Hoyt about why she tried to kill him, Justin stated that she and Jerry found out that she was in his will. While the jury was deciding on the verdict, Justin was seen lingering in the halls of the courthouse alongside Mabel Choate, Marla Penny, Joe Bookman, Marcelino, and some other people.
Justin Pitt was portrayed by the late Ian Abercrombie.
- He's very particular about the white socks that he wears, forcing Elaine to spend hours looking for the perfect pair. This mission kept Elaine from going to Atlantic City with Jerry, George and Kramer for the Miss America pageant in "The Chaperone".
- He has an aversion to fountain pens, and doesn't allow ink in office. A fountain pen's explosion was at the core of a scene at the end of “The Gymnast”: Elaine gripped his coat while her hands were covered in ink to get him to stop staring at a Magic Eye poster and go to a meeting, at which the ink got on his upper lip, lending him a resemblance to Hitler as he emphatically told a meeting of investors that "we will annex Poland by the spring at any cost and our stock will rise high!"
- He eats his Snickers candy bars with a knife and fork, which became the running joke for "The Pledge Drive".
- He also seems to have a fondness for Woody Woodpecker, and in "The Mom and Pop Store" got to live out his childhood dream of holding up the Woody balloon at the Macy's Thanksgiving Day Parade.
- Pitt is very wealthy, and lives in an expensive apartment building. This set up the plot of “The Doorman”.
- He was a close friend of Jackie Kennedy Onassis and hires Elaine because he believes she looks like her.
- He is British and speaks with a Received Pronunciation (BBC English) accent.