our approach to financial success

Back Office Integration

An organization’s back office management can significantly impact its success. Large volumes of data accrue on a daily basis, from various transactional processes such as order fulfilment, applications processing, transaction processing, billing, and collections that require effective back office solutions. GMAC is a reputed leader in empowering businesses and individuals through high quality back office services that promote enhanced business efficiency and improved bottom-line. -------------

Comprehensive strategic planning and budgeting

We help you develop and see your plan through to achieve your vision, by working together to monitor your implementation process, review performance and make critical changes to stay on track. As an external resource and vehicle for accountability, we can show you how to realize the full benefit of your investment in planning. With GMAC monitoring your budgets, financial forecasting, and profitability, you will better understand your financial reports and assure your business is on the right track.

aggressive tax planning

Tax planning is the key to successfully and legally reducing your tax liability. We go beyond tax compliance and proactively recommend tax saving strategies to maximize your after-tax income. Businesses and individuals pay the lowest amount of taxes allowable by law because we continually look for ways to minimize your taxes throughout the year, not just at the end of the year. With a proper tax plan, we have found that business owners have saved well into five figures annually. -------

meet your team

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anthony jianaces


Anthony is a co-founder of GMAC Accounting LLC, and spends a substantial amount of his time on the marketing efforts of the firm and overseeing client services. Anthony has worked in banking for ten years, directly helping small businesses with their finances. This is where Anthony first realized the need of reliable, cost-effective accounting and bookkeeping services for small business owners. Anthony attended Stonehill college where he graduated with a Bachelor of Science in Business Administration with a concentration in Finance. When Anthony is not in the office, he can be found spending time with his wife and three sons, or out playing golf.


jacob stewart


Jacob is a co-founder of GMAC Accounting LLC and works directly with client engagements supporting strategic tax planning and assisting in the day to day operations of GMAC clients. Jacob has worked in the financial industry for the last ten years, obtaining a broad knowledge base by examining investment advisers, hedge funds, private equity firms and many business structures in areas of compliance, performance, marketing, and asset verification. Jacob has experience with administering and enforcing the federal securities laws and tax laws across many industries. Jacob graduated Suma Cum Laude from Suffolk University with a double Bachelors in Accounting and Finance, a Masters in Tax and a Masters in Accounting. ​ When Jacob is not in the office, he can be found at the sports stadium cheering on any New England franchise with his lovely wife Carly by his side.

josh headshot

joshua messier


Joshua is a co-founder of GMAC Accounting LLC and deals directly with client relationships and also supports the day to day operations of GMAC Accounting LLC. For the past 8 years Joshua has worked in the construction field as a project manager for a multi-million dollar steel company. Joshua has worked directly with general contractors on a professional level to assure that each project runs at their maximum potential, dealing with client relationships, job cost, accounts payable and receivable. In his free time Joshua can be seen on the golf course or spending time with his family.

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