Costello College of Business Graduate Programs

Working full-time while getting a graduate degree is no easy feat. But for Air Force veteran and soon-to-be George Mason University alum Kathleen Gillmore, hard work is second nature.

In today’s business landscape, effective leadership depends as much on self-awareness and emotional intelligence as it does on strategy and analytics. Recognizing that, the Costello College of Business at George Mason University is partnering with the Center for the Advancement of Well-Being to provide Costello MBA students with a unique opportunity for one-on-one leadership coaching at no extra cost. 

Costello team places second in national AI competition, donates entire winnings—then one member matches the gift.

Sidney Yap, BS Information Systems Operations Management ‘20, MS Management ‘21, Business Analytics Grad Cert ‘22, MBA ‘25, exemplifies exceptional balance—driving innovative strategies at Navy Federal while representing the Philippines internationally in the hammer throw. 

The Costello MBA program at George Mason University prepares students to lead in this new era of AI—equipping them with the skills and strategic mindset to thrive. At Costello, AI isn’t a threat. It’s an opportunity.

In today’s ever-evolving professional landscape, continuous learning and skill building are essential to stay ahead. Annie Webb, a seasoned advocate in government affairs, recognized this truth early on in her career.

Meet Colleen Leavell, our Costello MS in Business Analytics Program Student Ambassador at the Costello College of Business at George Mason University. Colleen’s non-traditional path taught her to enjoy every second of her educational journey. Circumstances caused her to drop out in her junior year, but her dedication to learning brought her back to George Mason years later where she completed her undergraduate degree and is currently in the MS in Business Analytics Program. Always interested in Big Data, she’s excited to support fellow students in the Master's in Business Analytics Program, and happy to share her experiences. 

George Mason University Costello College of Business proudly introduces its 2024-25 cohort of Costello Student Ambassadors—an exceptional group of students who will serve as leaders, advocates, and representatives for the college. These individuals not only excel in their academic pursuits but also embody the values of leadership, community engagement, and professional excellence that define Costello’s mission.

The Costello College of Business at George Mason University is proud to announce its collaboration with the Deloitte Foundation through the Deloitte Foundation Accounting Scholars Program (DFASP). Starting fall 2025, this collaboration is expected to provide 10 full tuition scholarships to George Mason University students who intend to become CPAs after pursuing their master’s degree in accounting at the Costello College of Business.  

The Costello College of Business online MBA program jumped 19 spots with a new ranking of #55 nationally for Best Online MBA (#41 among public universities) from U.S. News & World Report. In addition, the Online MBA Program jumped 16 spots from last year for Best Program for Veterans, landing at #34 nationally (#30 among public universities). This new ranking places the Costello online MBA program #1 in Virginia for veterans.