After graduating from Northeastern University and obtaining his CPA license, Jon Sidoti joined the international accounting firm that now bears the name KPMG.   Working with both large and small companies, Mr. Sidoti enjoyed a wide range of accounting, tax and business auditing experiences but found he preferred working with smaller companies.  “I clearly enjoyed working with closely-held business and their owners” says Sidoti. 

After KPMG, Sidoti joined a Plymouth, MA consulting firm, where he became a partner in charge of tax planning.  In October 1988, Sidoti founded the firm which has evolved into Jon C. Sidoti, PC.

Jon lives in Plymouth with his wife Jean and has 3 grown children.  He is an avid cyclist and enjoys skiing.  

Doug’s responsibilities include corporate, partnership, personal, and trust tax return preparation, financial statement preparation, and IRS tax assessment and collection issues.

Doug earned his MBA at University of Massachusetts Dartmouth and is registered with the Internal Revenue Service as an Enrolled Agent (EA). He is currently pursuing his CPA.

Mary Joined Jon C. Sidoti, PC in January 2020 and brings over 30 years of public and private accounting experience in a diverse spectrum of industries. She has provided comprehensive accounting and income tax preparation services to individuals, corporations, partnerships and trusts. In addition, as a corporate controller for a number of entities, she managed all the accounting and finance operations as well as human resources.

Mary is a graduate of LeMoyne College with a Bachelor of Science in Business Administration majoring in Accounting. She is a member if the Massachusetts Society if CPA’s.

Deanna joined the firm in 2021. She has her BS degree in accounting from UMass Dartmouth, and many years of accounting experience with private large and small companies in various industries.

As a new resident of Plymouth, Deanna enjoys spending time with her husband and family exploring Plymouth and the surrounding area.

As a Tax Specialist, Samantha’s responsibilities include tax preparation of individual tax returns, bookkeeping and billing. Prior to joining our firm she worked as an administrative assistant for a physical therapy office.

After graduating from Silver Lake High School, Samantha attended Cape Cod Community College and studied web design and accounting.

Samantha is married and has two children. She enjoys spending time with her family, camping and crocheting.

As Administrative Assistant, Donna’s responsibilities include general office operations, as well as administrative and tax prep support to our staff. Before joining our firm Donna worked as a recruiting assistant at Koppen Group.

Donna is married and has 2 children. Outside of the office she enjoys travelling and spending time with her family.

Kelsey joined the firm in 2022. Kelsey comes to us with over 8 years of administrative experience in public accounting. Kelsey’s responsibilities include general office operations, as well as administrative and tax prep support to our staff.

Outside of the office Kelsey enjoys traveling and spending quality time with her family.