Meet the Team of KMN CPA LLC

The team of KMN CPA LLC is located in Marietta, Georgia and are experts in all areas of accounting, taxes, consulting, and business services.

Certified Public Accountant, Owner/Manager

About Kathy Moore-Nietrzeba, CPA

headshot of Kathy Moore-Nietrzeba, CPA

Kathy Moore-Nietrzeba prides herself on her over 30 years of experience working in the accounting field. Kathy is a Georgia native who received her Bachelor’s degree in accounting from Kennesaw State University in 1987. Kathy began an internship at age 21 with a CPA firm that specialized in working with medical and dental practices. This internship later turned into a 17-year career there and grounded her desire to continue working with medical and dental groups. It was also during this tenure that she became a CPA knowing that one day she would open her own CPA firm.

Kathy started her first CPA firm, Moore & Associates, in 2004 where she established herself as an expert CPA in the medical and dental niche. From there, Kathy merged her firm with a local wealth management firm and supervised the Accounting and Tax Department bringing in interns from Kennesaw State University, training them and even eventually having one of them come back and work with KMN CPA and is with us today – Whitney Boyd.

It was in 2014 that Kathy decided to relaunch her own firm under a new name, KMN CPA LLC. She was then able to tailor her services directly to her clients’ wants and needs by providing them with an optimal level of service, whether it is in person, over the phone or virtually. Kathy is also a proud member of the GA Society of CPAs.

Kathy lives in Marietta with her husband. She has two children and three grandchildren. During her free time, Kathy enjoys her family and church, leaving some time for personal fitness and travel.

Accounting Manager

About Kristin Wickey

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Kristin Wickey contributes over 15 years of Accounting and Business Management experience to KMN CPA. She joined our team in July 2019 as an Accountant and has transitioned to our Accounting Manager in early 2022 to ensure our clients get top notch service. She earned her Bachelor’s degree in Accounting from the University of Central Florida and her Masters in Forensic Accounting from Florida Atlantic University.

Prior to joining KMN CPA, Kristin worked for CPA firms in Florida and Georgia preparing financial statements and tax returns as well as participating in audits focused on clients in the educational and charitable industries. Kristin then took an opportunity with a top twenty-five defense contractor where she spent six years in multiple roles of increasing responsibility in commercial and government accounting, eventually becoming the senior finance lead for multiple internal IT projects.

Kristin resides in Cumming with her husband, six children and four cats. She enjoys spending time with her family watching movies, playing games, doing puzzles, cooking/baking, and cheering for her girls at their volleyball tournaments.

Certified Public Accountant

About Whitney Boyd, CPA

headshot of Whitney Boyd, CPA

Whitney Boyd joined KMN CPA in May 2017. She received both her Bachelor’s degree in Accounting and her MBA from Kennesaw State University and became a licensed CPA in 2008. She spent the first few years of her career as a Staff Accountant for a local financial planning firm.

Then in 2009, Whitney took the opportunity to relocate to New York City. She worked as a Business Manager for a CPA firm in Manhattan. Her clients were primarily in the entertainment industry – actors, directors, producers, and writers for television, film, and Broadway. During these years, Whitney handled a variety of matters for her clients’ personal and business financial affairs from maintaining general ledgers, to preparing net worth statements for co-op boards, overseeing routine bill pay and managing her clients’ day to day cash flow.

In 2016, Whitney and her husband decided to pursue yet another dream. They sold their belongings, filled a couple of backpacks, and set off. The couple backpacked around the world for 8 months, visiting 27 countries and making memories to last a lifetime. Now that she has settled in back home, Whitney resides in Milton, GA with her husband and her daughter. In her free time, she enjoys exercising, hiking, cooking and of course traveling.

Certified Public Accountant

About Nessy Black, CPA

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Nessy Black joined KMN CPA in August 2023. She has a well-rounded professional background, both with public accounting and industry experience, including Fortune 500 companies. Prior to joining KMN CPA, she worked for a CPA firm performing tax and audit engagements for a diverse client base. Nessy has also worked for a Big Four accounting firm supporting their division for individual tax for foreign nationals and expatriates. While raising her children, Nessy left the traditional business route and immersed herself in various contract positions, gaining exposure to a wide variety of companies.

Nessy attended college at Kennesaw State University where she earned both her BBA and her MBA and held a 4.0 GPA. She became a licensed CPA in 2022.

Nessy lives in the north Georgia mountains with her husband and the one remaining child still at home. In her spare time, she enjoys spending time outdoors, staying fit, and adventuring & relaxing with her family.


About Cathy Crain

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Cathy Crain joined KMN CPA LLC in September 2014 as a bookkeeper. She brings with her over 35 years of experience working in the accounting field. Her career began as a bookkeeper for Domino’s Distribution Center in 1985 and continued for 11 years as assistant to the Controller. Since then, she has worked for two other large Atlanta based firms as their internal Accountant. This has enabled her to work with different types of businesses, continually learning various aspects of accounting. Cathy has become an integral part of our bookkeeping department with her vast work experience coupled with her dedication and dependability.

Cathy was born and grew up in Queens, New York. She has called Georgia her home for over 30 years and now lives in Villa Rica with her husband and two dogs. She has two grown children and four grandchildren. During her spare time Cathy enjoys spending time with her family, reading, and exercising.


About Stephanie A. Butler

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Stephanie A. Butler joined KMN CPA, LLC in December 2022 as a Bookkeeper. She brings with her over 20 years of varied accounting experience.

She began her career as a Staff Accountant in a CPA firm performing bookkeeping, preparing financial statements, as well as taxes for high net-worth individuals and small business owners. Over the years she’s had the opportunity to work for large muti-billion-dollar companies in the travel and cold food storage industries, as a senior accountant where she advanced to managing her own teams. Stephanie has also worked as an auditor in Big-4, successfully reaching the level of manager.

Stephanie grew up in Mississippi but left shortly after finishing high school and joined the U.S. Army. After 4 years in the service, she earned her bachelor’s degree in accounting from Augusta College (currently Augusta University). She now resides in Marietta, GA where she enjoys spending time looking after her mother, trying to keep up with her little Yorkie named Bella, reading, and eating good food!

Administrative Assistant/Data Entry Clerk

About Rachel Zingg

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Rachel Zingg joined KMN CPA LLC in October 2023. She brings with her 20 years of various accounting experience. She is eager to utilize her Quickbooks experience, especially with the online version, to assist our team and clients with their bookkeeping needs.

Rachel grew up in the New Orleans, LA area and recently relocated to the Atlanta, GA area. She enjoys spending time with her husband of 21 years and her two senior dogs. Most of her free time is dedicated as a medical director/volunteer to the US branch of the Dogo Argentino Rescue.