About

Careers at Mullen

Teaching & Faculty Positions

List of 2 items.

  • Assistant Director of Admissions

    Job Opening for Immediate Full-Time Hire
    Assistant Director of Admissions
     
    Position Overview:
    Mullen High School, a Lasallian Catholic college preparatory high school in Denver, Colorado, seeks to hire a vital role within our Enrollment Management team. The Assistant Director of Admissions oversees the school's robust visit program and implements enrollment strategies to enhance yield outcomes. This includes cultivating prospective students and families, coordinating personal and group campus tours, overseeing the Shadow program, and managing the Student Ambassador program.
     
    Mullen High School is a co-educational, independent Catholic high school sponsored by the de La Salle Christian Brothers. We serve approximately 750 students from over 87 zip codes in the greater Denver metro area. Our historic campus is home to a college preparatory curriculum, a competitive interscholastic athletic program, and diverse, successful co-curricular opportunities.
     
    At the heart of Mullen High School’s mission are the Five Core Principles of a Lasallian School, which guide the institution’s work and purpose:
    1. Faith in the Presence of God – A commitment to the belief in the living presence of God in our world and our work as a Catholic institution.
    2. Concern for the Poor and Social Justice – Advocacy for and action favoring the marginalized and those most in need.
    3. Quality Education – A dedication to excellence in teaching and learning, preparing students for meaningful lives.
    4. Inclusive Community – Fostering a spirit of belonging, respect, and support for all individuals.
    5. Respect for All Persons – Honoring the dignity and worth of every individual as created in God’s image.
    The Assistant Director will report to the Director of Admissions and will sit on various campus committees, including the Enrollment Management Committee and Admissions Decision Committees. Candidates who are goal-oriented, detail-oriented, and energized by driving innovation are encouraged to apply. This 12-month, salaried position requires some evening and weekend work.

    CLICK HERE for the Full Job Description
    This is a 12-month, full-time, at-will position.
    Salary Range: $48,000- $60,000 per year
     
    Mullen reserves the right to pay more or less than the posted range
    depending on the candidate’s education, experience, and background.
     
    Mullen offers a competitive benefits package that includes health insurance with partially paid dependent premiums, an employer-paid defined benefit retirement plan, an employee 403(b) with an employer partial match, employer-paid life and disability insurance, a tuition remittance program, and generous paid time off.


    Application Deadline: Monday, May 12, 2025
    Interviews will begin for qualified applicants as soon as materials are received.
    Submit cover letter, resume, & three references to HR@mullenhigh.com

  • Substitute Teachers Pool

    Mullen High School is seeking Substitute Teachers to cover classes for teachers who are on retreat, attending conferences, or traveling to school-related events. Substitute teachers will be asked to monitor classes, proctor tests, and deliver simplified lesson plans.
    For any candidates that are interested in serving as a substitute for Mullen High School should send an e-mail to HR@mullenhigh.com with a resume and cover letter explain which courses you would be willing to substitute. 

Coaching Positions

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  • Head Coach - Ice Hockey (Boys)

    Mullen High School is seeking to hire an energetic, committed individual to serve as head Ice Hockey coach. This is a seasonal part-time, at-will opening for the 2025-2026 School Year.

    Mullen High School is a Lasallian Catholic college preparatory school conducted in the tradition of the Christian Brothers to give a human and Christian education to the young, especially the poor, as established in our five Lasallian Core Principles. As a member of one of the largest educational networks in the world, Mullen’s mission is to ensure its students are grounded in the living presence of God, have respect for all persons, are inclusive in their thinking, demonstrate sensitivity toward the poor and those suffering from injustice, and are educated to prepare for excellence in college and all their future endeavors.

    Supporting twenty-six separately gendered programs, Mullen High School has a rich athletic history, including over 80 State Championships and hundreds of individual State Champions. A long-time member of the highly competitive Centennial League, Mullen seeks to play the best to be the best.

    Mullen High School does not unlawfully discriminate or allow unlawful harassment in any of its programs, procedures, or practices based on age, color, disability, national or ethnic origin, political affiliation, race, religion, gender, sexual orientation, military service, or other protected classifications defined by the State of Colorado and local laws.

    The Department of Athletics at Mullen High School has an opening for a Head Ice Hockey Coach.

    CLICK HERE for the full job description.
    This is a part-time at-will position for the 2025-2026 school year.
    Compensation from $5,075.

    This is a temporary, seasonal position that is not benefit-eligible and does not come with a full-time position within the school.

    Application Deadline: April 25, 2025
    Interviews will begin for qualified applicants as soon as materials are received.
    Submit a cover letter & resume to HR@mullenhigh.com

  • Head Coach - Softball

    Mullen High School is seeking to hire an energetic, committed individual to serve as Head Softball Coach. This is a seasonal, part-time, at-will opening for the 2025-2026 School year.

    Mullen High School is a Lasallian, Catholic, and college preparatory school conducted in the tradition of the Christian Brothers to give a human and Christian education to the young, especially the poor, as established in our five Lasallian Core Principles. As a member of one of the largest educational networks in the world, Mullen’s mission is to ensure its students are grounded in the living presence of God, have respect for all persons, are inclusive in their thinking, demonstrate sensitivity toward the poor and those suffering from injustice, and are educated to prepare for excellence in college and all their future endeavors.

    Supporting twenty-six separately gendered programs, Mullen High School has a rich athletic history, including over 80 State Championships and hundreds of individual State Champions. A long-time member of the highly competitive Centennial League, Mullen seeks to play the best to be the best.

    CLICK HERE for the Full Job Description
    This is a part-time, at-will position for the 2025-2026 school year. 
    Compensation from $5,175. 
    This is a temporary, seasonal position that is not benefits-eligible and does not come with a full-time position within the school.
     
    Application Deadline: May 16th 
    Interviews will begin for qualified applicants as soon as materials are received.
    Submit a cover letter & resume to HR@mullenhigh.com 

Non-Discrimination Policy

Mullen High School does not discriminate or allow unlawful harassment in any of its programs, procedures, or practices on the basis of age, color, disability, national or ethnic origin, political affiliation, race, religion, gender, sexual orientation, military service, or other protected classifications defined by the State of Colorado and local laws. The policy applies in all aspects of employment with Mullen High School.

HUMAN RESOURCES

Complete the Employment Application and send it with your resume and cover letter to hr@mullenhigh.com.

Human Resources
c/o Mullen High School
3601 S. Lowell Blvd.
Denver, CO 80236

(303) 761-1764 ext.3336

Contact Human Resources

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Benefits Overview

List of 8 frequently asked questions.

  • Medical, Dental & Vision

    Mullen offers Medical, Dental and Vision insurance to all eligible employees through Cigna. We strive to maintain low cost to the employee. 

  • Paid Time Off

    Mullen offers a generous paid time off policy for teaching and non-teaching staff. Paid time off includes vacation, sick time, and family sick time. 

  • Educator Tuition Reduction

    After one year of employment with Mullen, eligible employees are able to participate in tuition reduction for dependents enrolled at Mullen High School. The percentage reduction is dependent on the employees years of service. 

  • Retirement Plan

    Mullen participates in a 403(b) retirement plan. Eligible employees can make contributions into the 403(b) plan up to the IRS's annual limitations. 

    Mullen also offers a Defined Benefit Plan fully funded by Mullen. Employees must remain with the company for 5 years to be vested in this plan. 

  • Life and AD&D Insurance

    Mullen provides all eligible employees with Life Insurance and Accidental Death & Dismemberment (AD&D) Insurance at no cost to the employee. We do also offer a supplement insurance to this category at the discretion and cost to the employee. 

  • Short & Long Term Disability

    Mullen provides all eligible employees with Short and Long Term disability at no cost to the employee. Disability insurance provides benefits that replace part of your lost income when you become unable to work due to a covered injury or illness. 

  • Employee Assistant Program

    We are proud to provide a confidential program dedicated to supporting the emotional health and well-being of our employees and their families. The EAP is provided at NO COST to employees through Unum.

  • Flexible Spending Account (optional)

    We give our employees the opportunity to participate in a flexible spending account through 24 Hour Flex. This is a pre-tax deduction that will help cover medical cost throughout the year. 
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