Ness Tax & Bookkeeping Service - Sioux Falls, SD

Call us


  The Local Best

The Ness Team

Tim Ness

Timothy Ness, EA:
Tim is  a former IRS tax auditor who founded Ness Tax and Bookkeeping Service in 1999. A graduate of Concordia College in Moorhead, MN, he received his MBA from the University of South Dakota. He is a QuickBooks Pro Advisor.

Mona Ness

Mona Ness, CPA, QuickBooks ProAdvisor:
Mona received her Master’s Degree in Professional Accountancy (MPA) from the University of South Dakota. She has distinguished herself as one of the most knowledgeable and friendly members of the Ness team. She is the primary source of contact for all corporate, partnership, and non-profit tax return preparation and also handles some of the more complicated individual tax returns.

Gary Forsch

Gary Forsch: 
Gary has more than 15 years of tax preparation experience and specializes in farm and small business tax return preparation. Friendly and trustworthy, Gary is one of our most requested preparers.

Gene Lebahn

Gene Lebahn, EA, QuickBooks ProAdvisor:
Gene is a graduate of the University of South Dakota where he obtained his Bachelor’s degree in Business Administration with an emphasis in Accounting. Gene has been with the firm for years primarily working with small business and individual tax clients. He is an IRS AFSP Record of Completion certified preparer.


Daniel Foster, CPA:
Dan is a graduate of the University of South Dakota with Master of Professional Accountancy. Dan has extensive experience in budgeting and financial reporting in the oil and gas industry. He also performs technical research of complex transactions, reviews and compilations.


Carol Jenkins, EA:
Carol is a graduate of Interstate Business College, ND. She has a long accounting and tax career in Rapid City, SD preparing individual and business tax returns, helping clients with IRS issues, and performing bookkeeping tasks.


Joseph Bolger Esq.


Ann Maynard, EA

Kimberly Elenkiwich

Kimberly Elenkiwich
Kimberly graduated from South Dakota State University in 2008 and is currently enrolled in the Master of Professional Accountancy program at the University of South Dakota.   She has over a decade of extensive experience specializing in the finance, underwriting and agriculture industries. 

Jazmin Del Castillo

Jazmin Del Castillo
Jazmin has several years of accounting experience working in the film, healthcare and real estate industries. She’s fluent in Spanish and English.


Kristi Fairbrother
Kristi is a graduate of the University of Iowa, she has more than a decade of public accounting and income tax experience.


Scott Owen
Scott is a graduate of South Dakota State University and the University of Sioux Falls with a degree in accounting. He received his MBA from Colorado Technical University. He has several years of income tax experience.


Ashley Dunn
Ashley is a graduate of Bellevue University with a degree of Business Administration. She has approximately 10 year of tax and accounting experience.


Karissa Vander Waerdt
Karissa is a graduate of the University of South Dakota with a degree in Accounting. She has several years of income tax experience.


Two locations to serve you:

1616 East 10th Street
Sioux Falls, SD 57103
Phone: (605) 332-4829

3220 West 57th Street Suite 104
Sioux Falls, SD 57108
Phone: (605) 361-5311

Call Toll Free - 1-888-311-3389
 Hablamos Español Por Favor Marque (605) 332-4829