John Amussen

John Amussen

Controller/Business Manager

Marlborough School

Los Angeles, CA

John Amussen has over three decades of experience as a financial executive in Los Angeles. He spent nearly two decades in film industry finance, working for Columbia Pictures, Paramount Pictures and 20th Century Fox. In 2015, he transitioned to independent school finance, taking the position of chief operating & financial officer at Milken Community Schools in Los Angeles. In 2019 Amussen joined Marlborough as their Controller and Business Office Manager. He was born in New York City, attended high school in Minneapolis and received an A.B. in American Civilization from Brown University. He holds an MBA from the Anderson School of Business at UCLA.

Online Courses

Past Webinars

  • Blending Respect and Efficiency in the Business Office This item is protected

    February 20, 2026
    Join members of NBOA’s volunteer Human Resources Council for a practical discussion on strategies to safeguard your working hours without compromising collegial relationships —all while saving time.
  • Facing the Aftermath of Disaster: Lessons & Preparedness Strategies This item is protected

    February 6, 2026
    Hear firsthand experience navigating the Palisades Fire and discover practical lessons in evacuation, business continuity, board governance and emergency response planning to help your organization prepare for the unexpected.
  • Business Office & Admissions Partnering on Net Tuition Revenue This item is protected

    January 23, 2026
    It’s essential to manage enrollment and financial aid in a consistent, sustainable and predictable way — but doing so can be complex and challenging. Learn how established sustainable net tuition revenue targets support mission, program and budget.
  • Optimizing the Auxiliary Workforce: Compliance, Culture & Sustainability This item is protected

    January 9, 2026
    This webinar invites school leaders to rethink auxiliary staffing — across summer, afterschool, enrichment and other programs — as a lever for sustainability, compliance and culture-building.
  • The Fine Art of Handling Conflict for Business Officers This item is protected

    December 5, 2025
    This webinar will equip attendees with practical strategies to navigate disputes with clarity and confidence, and offers actionable insights on handling complaints and resolving conflict in ways that foster collaboration and strengthen relationships.

Net Assets Articles