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Mary Ann Dunleavy

Actuary & Managing Consultant

Mary Ann is an Actuary and is the Managing Consultant of the Washington, DC office. Her primary focus is multiemployer retirement plans. She began her career at Buck Consultants in 1984 and has over 35 years of consulting experience. Mary Ann is an owner of Horizon Actuarial and currently serves on the company's Governance Committee.

Relevant Experience

Mary Ann Dunleavy is a highly experienced consultant, guiding clients across diverse industries with her in-depth knowledge of defined benefit plans. Known for her ability to communicate complex actuarial matters in easily understandable terms, Mary Ann has earned a reputation for providing exceptional client service.

Industry Activities

Mary Ann regularly presents at conferences and seminars, sharing her knowledge and helping to keep Trustees abreast of emerging trends and regulatory developments.

Off the Clock

Mary Ann cherishes quality time with her family and friends. Family outings, vacations, and shared experiences provide her with a sense of fulfillment and balance in her busy professional life.


Mary Ann is an Associate of the Society of Actuaries, an Enrolled Actuary under ERISA and a Member of the American Academy of Actuaries. Mary Ann graduated with a bachelor’s degree in mathematics from Iowa State University.

Mary Ann Dunleavy

Office: 240.247.4524 | Mobile: 571.426.4837

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