San Mateo County sheriff names other exec team member

“I’m honored to return to the Sheriff’s Office,” Monaghan said in a press release. “I’m committed to creating positive, respectful and collaborative workplace environments where employees feel valued, supported and empowered to grow.” 

In his role, Monaghan will oversee the day-to-day core functions of the Sheriff’s Office. He will lead the Professional Standards Bureau, which manages hiring, training and internal affairs matters, and he will support the crime lab and technology services units. 

While Binder was vying for the appointment of sheriff by the Board of Supervisors in November, he said he had every intention of bringing Monaghan and Chris Hsiung back to the executive team. Both Monaghan and Hsiung began working for Corpus shortly after she was sworn into office. Hsiung was rehired as the temporary undersheriff until next summer. 

“Assistant Sheriff Monaghan’s experience within both the Sheriff’s Office and the County make him the ideal person for this important role,” Binder said in the release. “One of my top priorities is ensuring fiscal responsibility within the Sheriff’s Office, and I am confident that, under his leadership, we will successfully uphold this commitment.” 

After Monaghan was fired in September 2024, he quickly assumed the role of chief inspector and director of Interjurisdiction Operations for the San Mateo County District Attorney’s Office. Before working for the Sheriff’s Office, he was chief of police for the town of Tiburon, and worked for the San Mateo Police Department for many years. 

Monaghan has a master’s degree in security studies from the Naval Postgraduate School’s Center for Homeland Defense and Security and a bachelor’s degree in criminal justice management. 

With Monaghan and Hsiung hired, there remain two assistant sheriff positions vacant. Binder has previously said he hopes to look internally to fill the roles.