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Careers at Mullen

Teaching & Faculty Positions

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  • Custodial/Maintenance Staff

    Job Openings 2022-2023 School Year
    Custodian/ Maintenance

    J. K. Mullen High School in Denver Colorado is seeking to hire a committed maintenance/ custodian to work in our buildings and outside within our maintenance department.

    The applicant is expected to perform custodial maintenance duties, including dusting, mopping, finishing, and buffing floors, vacuuming, and shampooing carpets, cleaning and restocking restrooms. This work will also include working outside in the heat and cold.

    Applicants should embrace the opportunity to be a role model to students in their faith and personal development. As Lasallian and Catholic staff, we work to inspire our students, spiritually and emotionally equally and anticipate that those who wish to join our staff look forward to this critical part of our work.

    This is a full-time position for the upcoming school year.
    Hourly Pay Range: $16.00 - $20.00 per hour
    depending on experience
    Mullen reserves the right to pay more or less than the posted range.

    Mullen offers a competitive benefits package to include health insurance and partial paid dependent premiums, employer paid defined benefit retirement plan, employer 403(b) contribution and employer partial match, employer paid life and disability insurance, cafeteria plan, and generous paid time off.

    Deadline for Applications is March 8, 2023. 
    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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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.


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

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.