John G Mondorf CPA/ABV, CVA

John graduated from the Syracuse University School of Management in 1979 with a B.S. in Accounting. He was then employed on the audit staff of the Binghamton, NY office of the Big Eight Public Accounting firm of Coopers and Lybrand. In 1981, he left C & L to join a local CPA firm where he continued his audit activities in addition to becoming involved in small business tax planning and preparation. In 1985 John established his own firm and its subsequent growth have been facilitated by the addition of competent staff committed to client service and the patronage of loyal clients.

In addition, through experience and formal education, John has expanded his skills to include business valuation and litigation support services. The firm recently received the highest possible rating in an evaluation of its quality control system as administered by the American Institute of Certified Public Accountants.

A member of the AICPA, the New York State Society of Certified Public Accountants, and the National Association of Certified Valuation Analysts, John has also obtained the AICPA’s Accreditation in Business Valuations designation. In addition, he has served on the boards of various charitable organizations.

John maybe contacted at

William P Fenwick CPA

Bill received an A.A.S. in Hotel and Restaurant Management from Paul Smith's College and a B.S. in Accounting from the State University of New York at Binghamton. He worked as an accountant in private industry and for a national public firm before joining the public accounting firm of John G. Mondorf, CPA. In 1999 the current firm of Mondorf & Fenwick PLLC was formed.

Bill works with a wide variety of clients and industries. This includes audits, reviews and compilations of businesses in the retail, service, governmental and not-for-profit sectors. He also specializes in tax planning and preparation for businesses and individuals.

Bill is a member of the American Institute of Certified Public Accountants, New York State Society of Certified Public Accountants, and has obtained the AICPA’s Certificate of Educational Achievement in Business Valuation. He has served on numerous non-profit organizations and boards.

Bill may be contacted at

Kirk Blackman CPA

Kirk earned a bachelor's degree from Binghamton University in 2007 and worked in private industry for a manufacturing company for several years before joining Mondorf & Fenwick in 2010. He became a partner of the firm in 2018.

Kirk's experience in public accounting include tax planning and preparation for estates, corporations, partnerships and individuals for a variety of clients in the medical, manufacturing, retail and service industries. Other duties include bookkeeping, litigation support, and the planning and field work of audits, reviews and compilations of various for-profit, not-for-profit, and governmental engagements.

Kirk is a member of the American Institute of Certified Public Accountants and the New York State Society of Certified Public Accountants. He has been an active volunteer on non-profit boards and fundraisers.

Kirk Blackman may be contacted at

Phone (607) 797-4339