About Us

Our company specializes in accounting and tax preparation services for a wide variety of clients. We specialize in:

  • Tax return planning and filing for individuals
  • Bookkeeping and payroll for small businesses
  • Corporate, Partnership, and Sole Proprietorship tax planning and filing
  • Comprehensive Financial Planning

Visit the Services area of our site to learn more about the many accounting and tax services available to individuals and businesses.

Visit the Contact Us page for information regarding how to reach us via telephone, fax, e-mail or mail.

Feel free to contact the office anytime. We're here to help.

With independently owned offices in North Liberty and Cedar Rapids, our staff covers an ever-widening area of Eastern Iowa.   


Aaron Christopher, PhD CPA

North Liberty Office

(319) 409-7416


Aaron has been a CPA for over 20 years and specializes in providing comprehensive tax, accounting, and financial planning solutions to his small business and family clients.  He has a Bachelors in Economics from Hendrix College, a Masters in Accounting from Oklahoma City University, and earned his PhD at Claremont Graduate University while working as a tax and accounting professor.  He began his career at two of the Big 4 public accounting firms and has served as the CFO of organizations with over $100 million in revenue and 700+ employees.  He is a licenced CPA in Iowa and Illinois.  He is also the founder of Plowshare Advisors and a registered Financial Advisor through Avantax Financial Services.  Aaron and his wife, Ada, have a nine year old daughter and seven year old son that keep them very busy.  


larrys 2011 pic

Larry Fenner, Enrolled Agent

Owner - Cedar Rapids office

(319) 390-7910

 Larry joined A+ Accounting in 2006 to manage the Cedar Rapids office. He has an Accounting and Business Administration degree from Mt. Mercy College. Larry is an Enrolled Agent and has years of experience with rental properties, S Corporations, and Individual tax returns. He can also help you with older tax return filings and notices from the IRS. Larry's industry experience includes retail, service and wholesale distribution. He also has a strong background in strategic planning for your company's growth.  


Tina Ries


Cedar Rapids

(319) 390-7910

Tina has over 15 years of bookkeeping and accounting experience fora variety of industries including auto dealerships, construction, manufacturing, and non-profit.  Regardless of the industry you are in, Tina can help you with your accounting needs.  


LeeAnne Mast


North Liberty

(319) 409-7420

 LeeAnne earned her BA in Business Administration from the University of Northern Iowa. With over 20 years of experience as a full service Accountant and Payroll Manager, LeeAnne fully understands the need for precision in maintaining your business records. Her dedication to excellence keeps A Plus clients on track, and poised to meet their business goals.



Josh PicJosh Timm


Cedar Rapids

(319) 390-7910

Josh joined A+ Accounting in December of 2011 as a Staff Accountant in the Cedar Rapids office.  He received his Accounting and Finance degree from Mount Mercy University in Cedar Rapids, IA.  He has experience in tax preparation, bookkeeping, and payroll.  Josh’s recent clients include construction, rental properties, and car dealership companies.  He is currently pursuing his CPA.  



Michelle Yetley

Accounting Manager

North Liberty

(319) 409-7430

Michelle joined the firm in 2018 and has significant experience in payroll, accounting, and tax preparation.  She has a Bachelors Degree in Accounting from Mount Mercy University and Bachelor of Arts in Liberal Arts from The University of Iowa.  She is an experienced small business owner herself and looks forward to working with small business owner/operators in the corridor.