The police union wouldn't have a contract with the 49ers. The city does. They need something like 150 officers to handle a typical gameday. That's about the number of sworn officers in the Santa Clara Police Department, including detectives and the chain of command. Obviously they go to outside officers for the bulk of their needs, even without the police union claiming that much of their membership will refuse the assignment while Kaepernick is there.
Here's the job listing for the temporary help. I'm guessing that some agencies are directly working with the Santa Clara Police Department (especially the Santa Clara County Sheriff) but it sounds like individual officers could work directly with the city of Santa Clara if they have the permission of their primary employer.
https://nextdoor.com/agency-post/ca...-diem-police-officer-special-events-28358623/
NOW HIRING - Per Diem Police Officer Special Events
The Santa Clara Police Department is actively seeking seasoned law enforcement professionals with an interest in part-time employment to apply as a Per Diem Police Officer for Special Events for assignments at Levi's Stadium. Effective July 1, 2016, the hourly wage for this classification has been increased to $65 per hour.
Individuals currently employed as a part-time or full-time Peace Officer with a California Law Enforcement Agency, working as a Level I Reserve Police Officer with a California Law Enforcement Agency or retired as a full-time Peace Officer with a California Law Enforcement Agency may be eligible to apply. All applicants are required to obtain authorization from their home agency Chief of Police / Sheriff authorizing them to work on a Per Diem basis for the City of Santa Clara.
http://agency.governmentjobs.com/cityofs...
Employment applications are available online and can be submitted electronically or in person at the Human Resources Department:
City of Santa Clara
Human Resources Department
1500 Warburton Avenue (West Wing, Lower Level)
Santa Clara, CA 95050
(408)615-2080
Applications are accepted on a continuous basis for Per Diem Police Officer Special Events (as-needed).