Cover letters introduce your experience, skills and qualifications to the hiring manager. Applicants for Staff and Administrator positions are required to submit a letter of interest.Pima County Employment Application. Please read this information before completing the application. Do not attach a cover letter unless specifically requested in the job announcement. Begin your journey to a fulfilling career at Pima. Check out free tools and resources to build a resume and find a job. This guide describes how to apply for jobs using the Career Page web site. The process consists of the following steps: Does PCC have a job placement service?