David-Rottkamp-199x300David M. Rottkamp, CPA, is Partner-in-Charge of the New York City Office and the Not-for-Profit Practice Leader at Grassi & Co.  David has more than 27 years of experience providing audit and advisory services to the not-for-profit industry.  David focuses on not-for-profit organizations serving individuals with special needs, religious organizations, educational institutions, membership associations, social service providers, healthcare providers, foundations, and the arts and culture world. David’s technical knowledge allows him to provide specific services, including OMB A-133 compliance audits and retirement plan audits.