Basic Job Search – Main page for searching for jobs. 2. Job Number – if known, enter the job number here. 3.Complete all requested information. This application is good for 90 days only. Career Opportunities with Harris County. Cover letters and CVs can be used to support your fully completed application form, which must also include a supporting statement. When deciding on a job title for your resume, use the title that best represents your current responsibilities and achievements. This takes 3 to 5 business days to complete. The candidate is then scheduled to begin! Career Opportunities with Harris County.