About

Careers at Mullen

Teaching & Faculty Positions

List of 3 items.

  • Assistant Athletic Trainer (Part-Time)

    Mullen High School is seeking to hire an energetic, committed individual to serve as an Assistant Athletic Trainer. This is a part-time 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 a 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 with over 80 State Championships and hundreds more individual State Champs. A long-time member of the highly competitive Centennial League, Mullen seeks the best to play in order to be the best.

    The Department of Athletics at Mullen High School has an opening for an Assistant Athletic Trainer. 

    CLICK HERE for the Full Job Description
    This is a part-time position for the 2025-2026 school year.
    Compensation is $35/hour up to 10 hours a week.
    This is at-will employment and is not benefit-eligible

    Submit cover letter & resume to HR@mullenhigh.com

  • Chief Financial Officer (Updated)

    Mullen High School is seeking an energetic and committed individual to serve as its Chief Financial Officer.

    Position Summary:
    The Chief Finance Officer (CFO) is a key member of the school’s Executive Leadership Team and is responsible for the strategic oversight and management of all financial aspects of Mullen High School. This includes budgeting, financial planning, accounting, audit coordination, tuition management, and risk assessment. The CFO ensures that all financial operations support the school's mission and strategic goals, promoting long-term financial sustainability. The successful candidate will possess strong leadership experience, a deep understanding of financial best practices in educational or nonprofit settings, and a commitment to Catholic and Lasallian values.

    CLICK HERE for the Full Job Description
    Salary Range: $130,000-$190,000
    depending on experience and education.
    Mullen reserves the right to pay more or less than the posted range. Mullen offers a competitive benefits package that includes health insurance and partially paid dependent premiums, an employer-paid defined benefit retirement plan, an employer 403(b) contribution and partial match, employer-paid life and disability insurance, a cafeteria plan, and generous paid time off.

    Application Deadline: Friday, October 17, 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

List of 2 items.

  • Assistant Coach - Track & Field (Jumps)

    Job Opening 2025-2026 School Year
    T&F Jumps Coach

    Mullen High School is seeking to hire an energetic, committed individual to serve as a Track and Field Jumps Coach. This is a 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 provide a human and Christian education to young people, 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 a sensitivity toward the poor and those suffering from injustice, and are educated to prepare for excellence in college and all their future endeavors.

    Supporting 26 separate gendered programs, Mullen High School has a rich athletic history with over 82 State Championships and hundreds of individual State Champions. A long-time member of the highly competitive Centennial League, Mullen seeks the best to play in order to be the best.

    Mullen High School does not unlawfully 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 Department of Athletics at Mullen High School has an opening for a Jump Coach. 

    CLICK HERE for the Full Job Description
    This is a part-time, at-will position for the 2025-2026 school year.
     

    Compensation is $2,795.
    This is a temporary, at-will seasonal position and is not benefit-eligible.

    Application Deadline: 1/6/2026
    Interviews will begin for qualified applicants as soon as materials are received
    Submit cover letter & resume to HR@mullenhigh.com

  • Assistant Coach - Track & Field (Throws)

    Job Opening 2025-2026 School Year
    T&F Throws Coach

    Mullen High School is seeking to hire an energetic, committed individual to serve as a Track and Field Throws Coach. This is a 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 provide a human and Christian education to young people, 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 a sensitivity toward the poor and those suffering from injustice, and are educated to prepare for excellence in college and all their future endeavors.

    Supporting 26 separate gendered programs, Mullen High School has a rich athletic history with over 82 State Championships and hundreds of individual State Champions. A long-time member of the highly competitive Centennial League, Mullen seeks the best to play in order to be the best.

    Mullen High School does not unlawfully 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 Department of Athletics at Mullen High School has an opening for a Throws Coach. 

    CLICK HERE for the Full Job Description
    This is a part-time, at-will position for the 2025-2026 school year.
     

    Compensation is $2,795.
    This is a temporary, at-will seasonal position and is not benefit-eligible.

    Application Deadline: 1/6/2026
    Interviews will begin for qualified applicants as soon as materials are received
    Submit 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

List of 1 items.

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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