Support you Deserve

We offer a broad range of services to help you secure a sound financial future. You've worked hard to get where you are. You deserve a firm that works hard for you.

Our Team

ZBS Group, LLP is a Certified Public Accounting and Consulting firm that offers Tax, Accounting and Advisory services to privately held businesses. We provide a full range of services at all stages in the business life cycle to a broad range of industries.

We can provide a superior service at an affordable price by partnering with specialized accounting, valuation and law firms worldwide that compliment the experience and knowledge of our staff. This allows us to maintain a small firm feel with large firm resources.

Our mission is to serve you by providing the highest level of expertise and professionalism possible. We treat every client like our only client.

Dov Zaidman, CPA

Managing Partner

Expertise includes charitable foundations, internet services, wholesalers, restaurants and construction, with experience in international business consulting and taxation, individual & business tax, and private auditing.

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Michael Zaidman, CPA, MS Taxation

Tax Partner

Taxation specialist for personal and business taxes. Experience with a wide range of business operations, including: contractors; wholesale and retail operations; physicians; attorneys; insurance agencies; executive recruiters; and residential and commercial rental properties.

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Dionne March, CPA

An experienced accountant with a diverse background, Dionne joined the firm in 2013 and works in both the Tax and Attest Services Departments. She prepares personal financial statements as well as performing compilations and attest services for small business clients.

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Rose Petrocelli, EA

Rose is a taxation specialist with much focus and interest directed to our clients, responding to their every question, problem and preparation request. She is knowledgeable, available, immediately responsive to every tax area, and available at any time for projections, tax strategy and all tax concerns pertaining to the individual or business client.

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Elliot J. Daum, EA

Elliot is a taxation specialist with over 35 years of experience. Concentrating on individual, trust and estates he also has experience with business issues including corporations, partnerships, payroll and sales taxes. In addition to tax preparation and planning, Elliot has experience with Federal and State examinations, appeals and collection issue.

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Siu F. Lai, CPA, MS Accounting

Siu is licensed to practice as a Certified Public Accountant in the State of New York. He holds a master's degree of Science in Accounting and a bachelor's degree in Accounting & Information Systems from The City University of New York, Queens College. He is an active member of the American Institute of Certified Public Accountants.

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Alan Guillemain, MBA, RTRP

Alan holds an MBA with distinction in Accounting from Seton Hall University, in New Jersey and is an IRS Registered Tax Return Preparer. He also has a BS in Business Management from Fairleigh Dickinson University.

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What Others Say

"My business is going great and I sincerely don't think that I would be as confident in it without ALL of their help." - Michael C, Yard Smart Lawn Car, Farmingdale, NY

"They made it INCREDIBLY easy and like everything else we've done with them, it was prompt and simple! ...We are always beyond satisfied!!" - Alyia C, Rising Moon Doula, Beacon, NY

"The service is priced competitively, but the quality of care is unmatched." - Justin A, Uhuru Strength and Conditioning, Bayside, NY

"I would not hesitate to recommend" - Dovid K, Gradient Tutoring, Far Rockaway, NY

"Everything from the start has felt seamless" - Daniel S, SC Entertainment, Hoboken, NJ

"Knowledgeable, professional, efficient, and very pleasant. I will most definitely return." - Leslie M, Bethpage, NY

"I am very pleased with the professionalism and knowledge of the whole team and highly recommend them to anyone who is looking for quality service." - Ines B, Flushing., NY

"Very efficient!" - Juana, O, Whitestone, NY

"It went very well. My first time here. Very efficient!" - Jeneva P, Old Bethpage, NY

"I'd recommend ZBS to anyone. They're good people you can trust with your finances." - Trey W, Brooklyn, NY

"All ZBS professionals are courteous, knowledgeable and provide quick responses to all requests. Their prices are just right for the level of service they provide. CanĀ“t ask for more. I am a very satisfied customer." - Luiz G, Garden City, NY

"Excellent. They were professional, knowledgeable, considerate & friendly." - Charlotte, S, Bayville, NY

"Very tech savvy firm, on top of their emails and communication, I get a VIP client treatment every time, highly recommend." - Anna T, Dix Hills, NY

Full reviews can be found at