Build your career and your community – apply for a position with Middlesex County today. Click here to find new career opportunities.Ready to write that job application follow-up email? Your email can make or break your job application. Here we explain the process for writing an effective email for a job application. Please contact the Human Resource department on 860-358-6384 or 860-358-8749. Apply to Data Entry Clerk, Mailroom Clerk, Secretary and more! Filing instructions are provided with each announcement and state how and where to apply. Highlight your knowledge, skills and abilities which best demonstrate your qualifications for this position. Fill out an application.