Meet Our Team
At Mamacos, Bysiewicz & Associates, we believe great work comes from a team that’s engaged, experienced, and personally invested in the success of every client. Our firm is built on a partner-led model, supported by a talented group of professionals who bring technical expertise and genuine care to the work they do.
Partners
Charlie Mamacos
CPA, MST
John Bysiewicz
CPA, MBA
Our Professional Services Team
Our professional staff supports our partners in delivering high-quality tax, assurance, and advisory services. The team includes CPAs, senior accountants, staff accountants, and administrative professionals who are committed to accuracy, organization, and consistent communication.
David Auclair
CPA, MST
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Tax Director
Experience:
David has over 25 years of working with businesses in the construction, real estate & hospitality, M&D and Tech/SaaS industries. David has vast experience providing income tax preparation services, implementing tax minimization strategies, and representing clients before the IRS and Massachusetts DOR. He works closely with privately-held companies and their owners to provide the information needed to allow them to make the most tax-efficient decisions possible. David was formerly a tax partner with a large national public accounting firm.
Education:
Masters in Taxation, Suffolk University
Bachelors in Accounting, University of Connecticut
Alex Wang
CPA, MSA
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Tax Senior Manager
Experience:
Alex has over 8 years of experience working with businesses in the construction, real estate, manufacturing, professional services, cryptocurrency, and technology industries. She specializes in multi-state tax compliance and strategic tax planning tailored for closely-held companies and their owners. Alex is focused on delivering a full-service experience for her clients to navigate in a dynamic tax environment and to achieve their long-term success.
Education:
Master of Science in Accountancy, Bentley University
Bobby Parrelli
CPA
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Audit Senior Manager
Experience:
Bobby has 10 years of public accounting experience servicing clients in a wide range of industries with a focus on audit and review engagements for privately held construction, real estate, M&D and ERISA companies. He assists clients with financial statement preparation, business planning and corporate tax returns. He uses the knowledge learned throughout his career to prepare clients for the future.
Education:
Bachelors in Accounting, Suffolk University
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