Accounting &
Tax Services, PLLC

Providing accounting & tax services for individuals, businesses and organizations as well as tax planning and financial management.


knowledgeable experience you can trust

Robert W. Sinkewicz, CPA, CGMA
Managing Member

Rob is a Certified Public Accountant and Chartered Global Management Accountant with 27 years of executive financial management experience across many different industries. He earned his BS in Accountancy from Bentley University in Waltham, MA in 1989. His extensive experience in accounting and tax as well as financial management enable Catamount to provide a full range of business services to any client.

Rob has worked in the aerospace manufacturing sector as a controller for the Goodrich Corporation and also spent time as a financial leader in the healthcare industry with Fletcher Allen Health Care and the State of Vermont - Agency of Health & Human Services as well as the public accounting arena with KPMG Peat Marwick and Gallagher Flynn. Rob has also owned and operated his own CPA firm since 1995.

He is a member of the American Institute of Certified Public Accountants, and Vermont Society of Certified Public Accountants. His business and community service includes serving on the boards of First Night Burlington, Green Mtn Concert Services, Inc., Green Mountain Autism Foundation, Essex Youth Hockey Association, Vermont Football Officials Association, Champlain Valley Swim League and Town of Essex Swim Team.

Rob lives in Essex, Vermont and is married to Christine, a senior electrical engineer who works at United Technologies. He and Christine enjoy scuba diving, boating, and Cornell Hockey. They have two daughters, Amanda and Sara.

Danielle Manahan, CPA

Danielle is a Certified Public Accountant with 18 years of financial services experience in various capacities. She earned a BS in Accounting and a BA in Business Administration from Saint Michael's College in 2000 and an MBA from Champlain College in 2013.

Danielle is currently the Vice President of Commercial Lending at Peoples Trust Company. She previously worked as an auditor for regional public accounting firm Johnson Lambert and Co. and as a tax accountant for Vermont CPA firm's A.M. Peisch and American Tax.

Danielle is a member of the American Institute of Certified Public Accountants, Vermont Society of Certified Public Accountants and the Risk Management Association. She is also a member of the Rotary Club of St. Albans where she serves as the Treasurer. Past board service includes treasurer roles at the St. Albans Historical Museum and the Vermont Alliance for Arts Education.

Danielle lives in South Burlington and enjoys hockey, fitness and nutrition, and spending time outside.


Robert W. Sinkewicz, CPA, CGMA
Catamount Accounting & Tax Services, PLLC
25 Wentworth Drive
Williston, VT 05495
phone: (802)662-1214
cell: (802)578-7896
fax: (802)662-1215

Regular Hours of Operation :
Monday thru Friday 8 a.m. – 4:30 p.m.

Evening and weekend appointments available.

tax resources

Download these helpful Tax-related documents
Links to online tax resources