William R. Sheridan, Jr. CPA, MST

Partner

Bill is a trusted tax advisor to individuals, businesses, non profits, and estates. He provides strategic tax and estate planning, tax structuring of business operations, and tax preparation.  His experience includes multi state tax audit planning, foreign income tax reporting, and client representation with federal and state tax audit and collection matters through the appellate level.

Bill graduated from Bentley University with a Bachelor of Science in Accounting with honors, and a Master of Science degree in Taxation (MST). He’s a Massachusetts CPA. He and his wife Sherrie have nine children and eight grandchildren. Bill is involved in numerous, professional, civic, charitable organizations, and enjoys playing golf and basketball.

Christine Sheridan, CPA, MST

Managing Partner

Christine Sheridan leads our renewable energy practice out of our New Hampshire office. She specializes in providing transaction advisory services to developers, syndicators and investors that qualify for the renewable energy tax credits (RETCs). She has assisted developers in structuring transactions, financial modeling, cost segregations, HLBV analysis and due diligence for solar and wind projects using renewable energy investment tax credits and production tax credits. Ms. Sheridan also has extensive experience consulting on accounting, tax, and regulatory matters, as well as providing traditional audit and tax services in the RETC, Historic Tax Credit, and Low Income Housing Tax Credit industries. Christine is a regular speaker at industry conferences. She earned her Master of Science degree in Taxation (MST) from Northeastern University and is licensed in Massachusetts and New Hampshire as a Certified Public Accountant.
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Michael Sheridan, CPA

Partner

Michael Sheridan, CPA, brings over 15 years of dedicated expertise in providing tailored tax, accounting, and advisory services to individuals, small businesses, trusts, and nonprofit organizations, helping them navigate complex financial landscapes with confidence.

As a licensed CPA in Massachusetts and New Hampshire, Michael Sheridan honed his skills through experience in public accounting, building a strong foundation in clear communication and meticulous attention to detail. Throughout his career, Michael Sheridan has successfully guided clients through IRS audits, optimized tax strategies for growth, and ensured compliance, resulting in significant savings and peace of mind.

Evan Tannenbaum, CFA, CPA

Consultant

A former client of the firm, Evan joined Sheridan’s renewable energy practice to provide transaction advisory services to developers, syndicators, and investors navigating renewable energy tax credits. Evan brings over six years of experience leading M&A and structured finance efforts for utility-scale and distributed generation (DG) developers.

He specializes in providing strategic financial analysis, performing due diligence for solar and storage assets, and developing complex financial models to support transaction structuring. Additionally, Evan supports individuals and businesses with complex tax planning and preparation.

Evan earned his B.S. in Energy, Business and Finance and a Master of Accounting from Penn State University. He is a CFA Charterholder and a licensed CPA in New York, New Jersey and Massachusetts (inactive).

Jason Void

Tax Accountant

Jason is a senior tax accountant of Sheridan CPA LLP. He has over eight years of public accounting experience. He has worked on high net individuals tax engagements and closely held corporations. He has completed engagements varying between domestic and international partnership and corporate compliance as well as income tax provisions.

Jason received his Bachelor of Science degree in Accounting & Finance from Florida Atlantic University in Boca Raton, FL. He enjoys traveling and spending time with his wife and daughter.

Tyler Tracy

Senior Accountant

Tyler is a graduate of the University of Massachusetts Isenberg School of Management with over 15 years of accounting experience across industries such as hospitality and education. He has led international accounting teams and specializes in improving operational efficiency through automation and process optimization.

Tyler is proficient in a wide range of accounting platforms, including QuickBooks Online, Intacct, Concur, and Bill.com. He supports the firm with financial statement preparation, bookkeeping, and audit and assurance services.

Sherrie Sheridan

Office Administrator

Sherrie is involved in the day-to-day operations of the firm in administrative operations, scheduling meetings, office support, and maintains recordkeeping. She works alongside the HR department with onboarding and also prepares and sends invoices.

Sherrie graduated from Middlesex Community College with her RN, and graduated with her Doctorate in Nursing degree from Chamberlain University. She retired from nursing. Sherrie enjoys tennis, traveling, and spending time with her family.

Lydia T Sheridan

Bookkeeper

Lydia T. Sheridan brings over seven years of government tax administration experience to Sheridan CPA LLP, supporting accurate, compliant tax guidance through strong regulatory knowledge and attention to detail. She holds a master’s degree in accounting and a Graduate Certificate in Business Analytics from Merrimack College, providing her with both a strong technical accounting foundation and analytical insight to support informed, compliance‑focused tax guidance.