(212) 661-2720 info@rbmcpas.com

About Our Firm

Founded in 1987, Regen, Benz & MacKenzie, CPAs, is a Certified Public Accounting firm licensed in New York. We provide audit, tax and advisory services. We work closely with our clients, helping them to mitigate risks and to grasp opportunities. We offer a broad range of services for business owners, executives, and independent professionals.

Our Clients

Our clients are individuals, professionals, business owners, and companies from a wide range of industries, including real estate, medical practices, manufacturing, retailers, personal services, restaurants, and nonprofits.

Professional Accountability

We are members of the American Institute of Certified Public Accountants (AICPA), and are registered with the Public Company Accounting Oversight Board (PCAOB), undergoing voluntary, external peer reviews of our accounting and auditing practices.

What Makes Us the Best

The founding principals are alumni of the “Big Five” accounting firms, with between 20 and 35 years’ experience in public accounting and tax management. Our staff is fluent in English, Spanish and Chinese, and we are always available to address your concerns.

Our Partners

William A. Regen
Partner


Mr. Regen became a Partner of RBM in 1987 after successfully running his own CPA firm for 3 years. Prior to this he has over 8 years of experience working for such firms as Sommer, Abraham & Gross, CPA’s and Peat Marwick Mitchell & Co. Mr. Regen received his Juris Doctorate Degree from St. John’s University School of Law and his Bachelor of Science Degree from Brooklyn College of the City Univ. of New York. Besides being a member of AICPA & NYS Society, Mr. Regen is also a member of the New York Bar Association and has been a practicing Attorney since 1983.

Susan M. MacKenzie
Partner


Ms. MacKenzie joined the firm in November 1992 as a manager and was made a partner in 1997. She previously worked for George Sullivan, CPA, and Sullivan & Preston, CPA’s in Southold between 1986 and 1992. Ms. MacKenzie received a Bachelor of Business Administration in accounting from Dowling College, Oakdale in 1986, and has been a certified public accountant since 1988. Ms. MacKenzie is also a member of AICPA & NYS Society.

Sal Marra
Partner


Mr. Marra is a CPA and his areas of expertise are in real estate, retail sales, manufacturing, medical practices and facilities as well as experience in a variety of other industries. He is a registered Quickbooks advisor and assists businesses with implementing and training on Quickbooks software. Mr. Marra is a graduate of Queens College of the City University of New York (January 1989) with a B.S. in accounting and has been a licensed C.P.A. since 1991. He also is a member of the American Institute of Certified Public Accountants and the New York State Society of Certified Public Accountants.

Monica Friedrich
Partner


Ms. Friedrich graduated from Baruch College in 1991, Cum Laude with a BBA. She joined the firm in 1991 as a staff accountant and became a CPA in 1994. She became a partner of the firm in 2004 and has worked for the firm for 19 years. She works with various clients, including those in real estate and manufacturing.

José A. Rosa
Partner


José services a wide range of clients including high net worth individuals, corporations, and partnerships. During his 20 years of diversified tax and accounting experience, José has been assisting his clients on all levels of tax planning and compliance issues in the following areas:

  • Business consulting and strategy
  • Federal and state tax compliance
  • US investments for non-residents
  • Entrepreneurs and family-owned businesses
  • High-net worth individuals and families

He received his Bachelor of Science degree in Accounting from The City University of New York at Hunter College; He is Certified Public Accountant licensed to practice in the State of New York and is a member of the American Institute of Certified Public Accountants and the New York State Society of Certified Public Accountants. Additionally, José is a native Spanish speaker.

 

Years in the Business

Founded in 1987, Regen, Benz & MacKenzie, CPAs, PC helps to protect your assets and provides effective tax planning that well-positions you for growth.

Long-Term Clients

We strive to find innovative ways to meet our clients’ changing needs, we also discuss tax law changes and new ways to help leverage saving opportunities.

Expert Accountants

Each member of our team is an experienced accounting and finance professional focused on helping our clients make informed decisions that affect their financial well-being.

Our Story

Founded in 1987, Regen, Benz & MacKenzie, helps to protect your assets and provides effective tax planning that well-positions you for growth. We strive to find innovative ways to meet our clients’ changing needs. Prior to year-end, we also discuss tax law changes and new ways to help leverage saving opportunities. Our commitment to efficient and personal client service, combined with our wide range experience and expertise, sets us apart from other accounting firms.

Professional Accountability

Regen, Benz & MacKenzie actively participates in the accounting profession’s system of self-regulation. We are members of the American Institute of Certified Public Accountants (AICPA), and are registered with the Public Company Accounting Oversight Board (PCAOB), undergoing voluntary, external peer reviews of our accounting and auditing practices. We consistently meet the required standards of good professional practice.

Who We Work For

Our professional expertise and diverse staff allows Regen, Benz & MacKenzie to offer a full range of accounting and financial services to clients from many different industries. We serve numerous commercial and professional clients, located primarily in the Greater New York City Metropolitan area.

Our clients include:

  • Private businesses in diverse industries
  • High net worth individuals

What Makes Us the Best

Regen, Benz & MacKenzie is the result of merged component firms and the endeavors of highly experienced CPAs. The founding principals are alumni of the “Big Five” accounting firms, with between 20 and 35 years’ experience in public accounting and tax management. This enables us to combine vast experience and state-of-the-art resources with personal client relationships nurtured by our partners and associates.

The result is financial intelligence and more time to focus on growing wealth and business.

Client Comments

“It is difficult to find an accounting firm in Manhattan that has the expertise needed to navigate the always changing tax laws, takes my calls, answers my questions and delivers fast and friendly service at a conservative price. I have been a client of Regen Benz and MacKenzie for two years and I finally have found what I was looking for.”

“I have used the services of Regen, Benz and Mackenzie, CPA’s P.C. for several years. The service provided, is second to none. They are extremely prompt in returning phone calls, and provides top notch service. I have been a client of this firm for several years and am extremely satisfied. It is without reservation that I highly recommend this firm to business owners and all others who have to pay taxes.”

Hands-On Relationships

Regen, Benz & MacKenzie, CPAs, PC believes business works better with hands-on relationships. Our in-depth tax and accounting services are personalized to meet the needs of our clients. We offer our clients personal, regular contact with a tax or accounting professional who knows and believes in their goals.

Contact Us

Our tax and planning experts will help your business and wealth management to move you forward.

Call us during regular business hours at (212) 661-2720 to make an appointment.

• info@rbmcpas.com

• (212) 661-2720

• 57 West 38th Street, 3rd Floor, New York, NY 10018

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