The City of Arcata has 4 employee groups - 2 are represented and 2 are unrepresented.
The 2 represented employee groups are:
- Arcata Police Association (APA) - consisting of all sworn and non-sworn represented classifications in the Competitive Service within the Police Department
- International Union of Operating Engineers Local Number 3 AFL-CIO (OE3) - consisting of all other represented classifications within the competitive service
The 2 unrepresented employee groups are:
- All Management, Mid-Management and Confidential classifications
- All Part-Time, Seasonal and Temporary classifications