Our Staff

Our Story

Our Team of Experts

Greg Hollibaugh, CPA

Greg is a Nebraska native and a long-time South Dakota resident with experience managing and leading in corporate tax and finance along with extensive accounting experience.  He graduated with a Bachelor’s degree in accounting and business administration from Chadron State College.

Greg purchased the practice from Sharon Hoggatt in November, 2017.  The firm has been serving western South Dakota for over 40 years.

Greg Hollibaugh CPA, Inc., acquired J. A. Erickson & Co. PC, December, 2019, and merged the firms.  We will operate out of the office at 617 Dahl Rd Suite B in Spearfish, SD.  We appreciate your loyalty and look forward to serving both firms’ clients in the future.  

He is a member of Northern Hills Rotary, Spearfish Chamber, the American Institute of Certified Public Accountants and South Dakota CPA Society.  In his spare time, he enjoys spending time with family, hiking and camping in the hills and travel adventures throughout the world.

Mandi Tipton, CPA

Mandi is a North Dakota native and a long-time Spearfish resident with 18 years of experience assisting clients with their accounting and tax needs.  She graduated from Northern State University with a Bachelor’s degree in professional accountancy and began working in the firm after graduation.

Mandi passed the CPA exam in December 2018 and is excited to continue providing a high level of service to clients.

She enjoys volunteering with the Spearfish Fire Auxiliary, supporting youth sports in Spearfish and hosting a Spearfish Sasquatch player with her family.  When not working or volunteering, she enjoys spending time with her family and the activities and sports they are involved in.


She is a graduate of Black Hills State University with a bachelor’s degree in business administration.Marilyn Ginter

Marilyn is a South Dakota native and has worked for the firm since 2012 after ‘retiring’ from a career in the banking business. She strives to provide excellent customer service to all clients.

She is a volunteer at the Good Shepherd Clinic in Spearfish.  Marilyn is an avid Colorado Rockies baseball fan and enjoys attending games whenever possible.  Besides baseball, she enjoys spending time with her family and friends and supporting her family in other sports activities.

Andrea Wager

Andrea is a South Dakota native and began with the firm in 2016.  She is a graduate in December with a Bachelor’s in business administration from Black Hills State University.

Andrea stays involved with Relay for Life and Special Olympics.  When not working or volunteering, she enjoys time with her husband, two children and extended family.

Becky Hollibaugh

Becky joined the team September 2020 as an administrative assistant.  She is a graduate of Chadron State College and most recently taught in the Rapid City school system.  You will find her working behind the scenes organizing and scanning client documents into our document management system.  Becky enjoys visiting and spending time with her grandsons who live in Tennessee.  She also enjoys travelling and taking pictures of her many adventures along the way.  Most recently you would have found her fishing for King Salmon in Alaska where she caught the largest one out of all ten fisher’s!!!

Bryce Thorman

Bryce is a South Dakota native and began with the firm in 2020 as an intern for two tax seasons. He joined the firm full-time in 2021 when he graduated with a Bachelor’s in Professional Accountancy from Black Hills State University.

Bryce enjoys spending time mountain biking in the hills. Bryce stays involved with the Ridge Riders who maintain and build trails for a variety of users. In his spare time, you’ll find him hiking or driving in the hills, listening to music, or enjoying time with family.



We are here to maximize your time and money.

Put your dollars to work. Take the stress and headache out of tax reporting and bookkeeping. Whether it is your personal finances or you own a business, our list of services provides a peace of mind to your pocketbook.


At Greg Hollibaugh CPA, our standard is set high for our clients. Your personal or business finance is as important to us as it is to you. That is why you can expect trustworthy and confidential service.


Years of experience make for smart financial advice!

Greg Hollibaugh CPA was once known by another name. Greg purchased the business from Sharon Hoggart in 2018, and brings to the business over 20 years of accounting experience.



Our commitment to customer satisfaction is our driving force. We know your dollars are not easily earned, and we are committed to helping you manage and account for those dollars the most efficient way possible.


Get In Touch

Make an appointment today to chat with Greg and his team. Let’s see what we can do for your financial goals.

Greg Hollibaugh CPA

We are here to maximize your time and money. Offering business and personal tax & accounting services.

Trustworthy. Expertise. Customer Care.



Browse a page

Our Staff

Log in to your account and securly submit your files.

Your information protection is important to us. Learn more about our privacy policy.


Get In Touch

(605) 642-4473 or (605) 642-7956


M-Th: 8am-5pm                           (open during noon hour)

Fax: (605) 642-7540

617 Dahl Rd | Suite B | Spearfish, SD