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Careers at Mullen

Teaching & Faculty Positions

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  • Development Assistant

    Position Overview
    Mullen High School is seeking to hire a Development Assistant. The primary role of this position is to support the Development team in all efforts related to fundraising, communications, events and donor relations. The Development Assistant is responsible for the maintenance of Mullen High School’s donor database (Raiser’s Edge) and all gift processing and acknowledgments. This position reports to the Chief Development Officer (CDO).

    View the full job description here.
    Application Deadline: November 6, 2020
    Submit cover letter, resume, and three references to HR@mullenhigh.com
  • Science Teacher (Long-term Substitute)

    Essential Job Functions
    Catholic and Lasallian Identity
    • Understands, emphasizes and supports the Lasallian and Catholic nature of the school at all
    • times and through all responsibilities and programs.
    • Models the role of teacher to promote student behavior that is supportive, and conducive, to
    • the implementation of the school’s instructional programs and goals.
    • Exemplifies and upholds the expectations and actions of Lasallian professionalism.
    • Intentional focus on student achievement.
    • Stimulate inquiry and engagement through project-based instruction
    • Prepare lessons based upon backwards design
    • Grade student work, and maintain/update grades
    • Build and maintain positive relationships with students and instructional teams
    • Utilize effective research-based instruction and evaluation
    • Utilize both formative and summative assessment for student mastery
    • Communicate effectively with students and families
    • Work outside the normal schedule periodically in collaboration with colleagues
    • Demonstrate competency in integrating technology into classroom teaching
    • Demonstrated competency of collaborative work
    • Bachelor’s degree in related subject is required; Master’s degree is preferred
    • Teaching certificate in Science
    • Strong commitment and desire to work with youth and adults in a collaborative environment
    • Enjoy the challenge of implementing new teaching methods and educational tools in an ever changing and strategic environment
    • Ability to utilize technology and integrate the use of technology to instruct and provide feedback on student's performance and development
    • Life-long learner, optimistic, flexible, and passionate about helping all students reach their potential
    • Open to change and possess skills that promote student achievement and growth.
    Application Deadline: October 23, 2020.
    Submit cover letter, resume, and three references to HR@mullenhigh.com
  • Substitute Teachers

    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.

Coaching Positions

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Send résumé and materials to:


Human Resources
Mullen High School
3601 S. Lowell Blvd. Denver CO 80236


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.