Middlesex County Teaching Jobs. Find great teaching, administrative, coaching, and support staff jobs in Middlesex County.In applying for any open position, please follow the directions given at the bottom of the job description (cover letter, resume, etc.). Describe any relevant special job-related skills, training, and qualifications acquired from employment, volunteer activities, skilled trades, etc. Learn how to write effective resumes and cover letters, view sample resumes and cover letters, and get tips for completing job applications. Welcome to Middlesex Borough School District! To establish a complete pre-employment file, please complete the online application. Write two to three paragraphs that focus on your training as a teacher, student teaching and any achievements you've made. New opening - Full-time Elementary Teacher -Middlesex ELEM-Grade 5 at Baltimore County Public Schools position hiring now. Apply to Adjunct Faculty, Instructor, Tutor and more!