Let’s Make Your Life Easier
Financial decisions are easier when you have a CPA firm you can trust. We serve businesses and individuals across the Northeast who value a CPA team that is proactive, thorough, and personally invested in their success.
Personalized
client service
strong team
Decades
of hands-on experience
About Mamacos, Bysiewicz & Associates, LLC
Mamacos, Bysiewicz & Associates is an entrepreneurial-minded CPA Firm, providing tax, assurance, and consulting services to the Northeast’s preeminent closely held businesses, shareholders, and high-net worth individuals.
Our core purpose is to foster long-term relationships with our clients and colleagues through a personalized, high touch point environment.
Our Story
Our CPA firm was founded by two former Global 6 CPA firm partners with a vision to build a culture where clients felt known, supported, and understood. Over the years, our team has grown, but our approach hasn’t changed:
- Partner-led expertize
- Entrepreneurial approach
- Thoughtful, ongoing communication
- A calm, steady approach to complex issues
- Long-term relationships, not one-off engagements
Read more about our founding partners below.
What We Stand For
Our work is built on clarity, trust, and a high-touch client experience.
- Accuracy you can rely on
- Proactive guidance rooted in real experience
- Partner involvement in every engagement
- Clear communication you can count on
- A long-term approach to tax, audit, and consulting
Contact Our CPA Team Today
Let us know how we can make your life easier.
Frequently Asked Questions
Do you only work with clients in Needham, MA?
No. While we are a CPA firm based in Needham, we support clients across Massachusetts and the Northeast.
What services do you provide?
We offer tax preparation, tax planning, assurance services, consulting, and IRS representation.
Do you work with high-net-worth individuals?
Yes. Many of our clients are shareholders or individuals with complex tax and planning needs.
Can we meet virtually?
Absolutely. Many clients choose to work with us remotely for convenience.
How does your pricing work?
Our pricing is based on the complexity of the work, the level of support required, and the type of engagement. We don’t offer generic “menu pricing” because every client’s needs are different, but we’re always transparent and discuss pricing before any work starts.