Leslie Fajfer

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Meet Leslie*

Leslie provides family office services and solutions for high-net-worth individuals. With a commitment to building strong client relationships and tailoring financial solutions to meet the unique needs of each client, Leslie helps clients improve financial functions, cut costs and automate processes. Leslie serves clients in the real estate, nonprofit, education, retail and insurance industries. Her clients include ad-tech companies, medical and dental practices, law firms, architects and interior design firms, high-end retail companies and insurance services firms.

Prior to joining Armanino, Leslie was a partner at Outsource Your Books, LLC, one of the largest outsourced bookkeeping and accounting services firms in the Northeast. In this role, she interfaced and collaborated with CFOs, CEOs and business owners from a variety of industries, building business relationships to ensure client satisfaction for hundreds of companies.

*Leslie holds her interest in the firm through L-GEM Accounting Services

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Professional History


  • Association for Corporate Growth, New York Chapter


  • American Heart Association – committee volunteer
  • American Cancer Society – committee volunteer
  • Rachel’s Dance for The Cure (RDFTC) – Board Member


  • Dowling College


  • Outsource Your Books, LLC (OSYB LLC)


  • Long Island Newsday’s People On the Move
Industries Served