en.wikipedia.org/wiki/Julia_Pierson

This appears to get Pierson’s graduation year wrong.

• The University of Central Florida’s official magazine identifies her as “Julia Pierson, ’81” and says she “earned a bachelor's degree in criminal justice from UCF in 1981.”
• Central Florida Public Media also reported that she “graduated from the University of Central Florida in 1981.”

Those sources directly contradict the article’s statement that she graduated in 1980.

The date range in this sentence is internally inconsistent with the historical record.

• George W. Bush was sworn in as president on January 20, 2001. So he was not yet "President George W. Bush" at any point during 1988–2000.
• Julia Pierson’s official White House biography says that from 2000 to 2001 she served as Special Agent in Charge of the Office of Protective Operations, meaning she had already left the earlier protective-detail assignment by 2000.
• A contemporaneous Spectrum News profile, citing White House information, gives her career history as 1988–1992: Special agent, Presidential Protective Division, followed by other roles in the 1990s and 2000–2001: Special agent in charge, Office of Protective Operations.

So the statement as written is incorrect: Pierson could not have served on the protective detail of President George W. Bush during 1988–2000.

This sentence misstates the timing of Pierson’s Orlando Police Department service.

• The White House’s official announcement of Pierson’s appointment says she was a police officer in the Orlando Police Department from 1980 to 1983.
• UCF’s official magazine says she earned her bachelor’s degree in criminal justice in 1981.

Those dates mean her OPD service began before she graduated from UCF, not entirely following graduation. They also mean the portion of her OPD service after graduation was roughly 1981–1983, not a full three years after graduation.