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Home Our People John M. Mortenson

John M. Mortenson


CPA, Managing Director, Assurance and Accounting

Stress is a word not in my vocabulary.
John Mortenson, Partner


John is the partner-in-charge of our East Brunswick, NJ, office. In addition, John is the Practice leader for the Assurance and Accounting Services for the firm. In this capacity, his responsibilities include overseeing the delivery of all accounting and auditing services to the firm’s clients and include ensuring the firms system of quality control adhere to all professional standards. He is a licensed certified public accountant in the state of New Jersey and has more than 30 years of professional experience. John provides accounting, auditing, tax and business advisory services to many industries, including pharma, biotech, insurance, manufacturing and distribution companies, and also has experience working with SEC reporting companies.

A graduate of Fairleigh Dickinson University, John joined Withum in 1985. He is a member of the American Institute of Certified Public Accountants (AICPA) and the New Jersey Society of Certified Public Accountants (NJCPA).

In his community, John is President of the Board of Directors of Embrace Kids Foundation, a not-for-profit organization supporting children with cancer and blood disorders. He resides in Monmouth County, NJ.

Withum isn’t just a job— we’re a family, and we carry that spirit together in everything we do. We live the Withum Way. We are catalysts for growth and success.

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