Setting the Pace

The world of business has changed dramatically since Roberts, McKenzie, Mangan & Cummings first opened its doors. Our response to major technological, political and sociological developments, as well as our adherence to basic principles of business, have steered our firm and our clients through two decades of unprecedented change.

And RMMC has seen dramatic growth in direct response to our clients’ needs.

Success in any business relies on the ability to foresee the impact of change and to respond appropriately. At RMMC, this ability is seen in our transformation from a traditional tax and audit provider to an accounting firm offering an array of contemporary services to both businesses and individuals.


Our Firm


Our Mission:

At the firm’s inception, its four founding partners set a high standard for superior personal service for every client.  Since 1978, RMMC has earned a reputation as an accounting firm with knowledge, experience and a record of success.

Our commitment to this standard is apparent throughout the firm in the professionalism of every staff member.  Combining our commitment with our solid, long-standing reputation for quality results explains why RMMC is the accounting firm of choice for so many organizations and individuals in Southwest Missouri.


Kelley McKenzie
Kelley McKenzie Partner
Kelley graduated from Southwest Missouri State College in 1967 and 1972 with majors in accounting, mathematics and physics. He joined the national firm of Fox & Company in 1971 and was a tax manager in their Springfield office until leaving in June 1978 to establish RMMC.

Professional affiliations include the American Institute of Certified Public Accountants, the Missouri Society of Certified Public Accountants, the Greene County Estate Planning Council and the Springfield Southeast Rotary Club.

Joseph S. Greene
Joseph S. GreenePartner
Joe joined the firm of Feyh and Fugitt in 1981. He worked as a manager until the Firm’s reorganization in 1986 when he became a partner in the successor firm of Feyh, Brown and Greene. He became a partner in RMMC as a result of a 1990 merger with FBG. Joe specializes in small business and construction industry and the restaurant industry. He received his Bachelor’s degree from Southwest Missouri State University in 1983, his Master’s degree from Drury College in 1992, and the AICPA Certificate of Educational Achievement in Tax Planning and Advising For Closely Held Businesses in 1997. He has also been an accounting instructor at Drury University.

His professional affiliations include the American Institute of Certified Public Accountants, the Missouri Society of Certified Public Accountants, Springfield Contractors Association and the Greater Ozarks Building Systems Association.

Timothy K. May
Timothy K. May Partner
Upon graduation from Drury College in 1982, Tim joined the firm of Carter, Mitchum and Company. He practiced with that firm until joining RMMC in 1985, specializing in accounting, taxation and trucking industry issues. In January 1991, he was made a partner in the Firm. Tim was also an accounting and tax instructor at Drury University for over 15 years.

His professional affiliations include the American Institute of Certified Public Accountants, the Missouri Society of Certified Public Accountants, the National Accounting and Finance Council of the American Trucking Association and the Missouri Motor Carriers Association.

Patrice A. Moore
Patrice A. MoorePartner
Patti joined RMMC in 1988 after coming to Southwest Missouri in 1986, specializing in accounting and bookkeeping, small business and computer consulting, and in all forms of taxation and estate planning. She received her bachelor and master’s degrees from the University of Michigan in 1981 and 1983 and completed the AICPA National Tax Education Program in 1996. She has prior experience in hospital administration, public advocacy and in working in a large non-profit organization and has also been an accounting instructor at Ozarks Technical Community College. She is the recipient of the 2000 MSCPA Public Service Award and was named one of Springfield Business Journal’s Influential Women in Business for 2002. In addition to being a CPA, Patti was certified as a Chartered Global Management Accountant (CGMA) in 2014.

She is a past president of the Greene County Estate Planning Council and has been a member and officer of numerous community boards. Professional affiliations include the American Institute of Certified Public Accountants, the Missouri Society of Certified Public Accountants and the Greene County Estate Planning Council. Patti is also a QuickBooks Certified Professional Advisor and is a past member of the Springfield Rotary Club.

Robert W. Rebmann
Robert W. RebmannPartner
Upon graduation with his bachelor’s degree from Southwest Missouri State University in 1992, Robert joined RMMC as a staff accountant. He was promoted to manager in the firm in 2000, and was made partner in the firm in January 2005. He is licensed as a CPA in Missouri and Arkansas specializing in small business, construction and governmental accounting and auditing. He received his Master’s in Business Administration from Southwest Missouri State University in 2003.

Professional affiliations include the American Institute of Certified Public Accountants, Missouri Society of Certified Public Accountants, and the Association of Certified Fraud Examiners.

Tammy Young
Tammy YoungPartner
Tammy grew up in Wayne, Nebraska and received her Bachelor’s Degree in Business with a concentration in Accounting from Wayne State College in 1994. With eight years of public accounting experience and nine years of private experience at the Controllership level of a large company, she returned to RMMC to serve her clients with this unique combination of experience. She specializes in taxation, controller/cfo outsourcing, and computer consulting for small to medium sized companies.

Tammy has been involved in several civic organizations in the past, including the Red Cross, United Way, Relay for Life, and The Summit Preparatory School. Currently she is a member of the Springfield Chamber of Commerce Small Business Counsel, a board member and audit chairman of the Girls Scouts of the Missouri Heartland, and Treasurer of the Republic Athletic Booster Club. Professional affiliations include the American Institute of Certified Public Accountants, and the Missouri Society of Certified Public Accountants.



Jeff Keeling
Jeff Keeling
Karen Roberts
Karen Roberts
Karen is a 1998 graduate of Southwest Missouri State University with a B.S. in Accounting. She started her career in private accounting with a Fortune 500 Company. She joined RMMC in 2001 as a staff auditor. Karen is currently an audit supervisor and specializes in the audits of non-profit organizations, small business, employee benefit plans and construction industries. With experience in these industries, she is also very knowledgeable in the preparation of income tax returns. She is a licensed CPA in the state of Missouri.
Paula Melton
Paula Melton
Paula grew up in Bolivar, Missouri and decided to go back to school while raising her family. She is a 2001 magna cum laude graduate of Missouri State University with a B.S. in Accounting and finished her Master of Accountancy degree in 2003. Paula worked for another local CPA firm before joining RMMC in 2005. Her concentration is in small business accounting, Quick Books training, bookkeeping and all forms of taxation. She is an avid sports fan, but when not working at RMMC, she most enjoys spending time with her husband and granddaughter.


Audit and Attestation:

Robert Cummings
Jackie McCroskey
David McPherson
Kaleb Roy

Accounting and Tax

Peter Bauer
Susan Joy
Erica Brockus
Carol O’Connor
Megan Pursley
Lulu Saige


Kathy Clark
Marilyn Lee



If you would like to sumbit a resume. Please send it to us either by  or by dropping it off at 4035 S. Fremont in Springfield, MO. Zip code is 65804.


  • Accounting and Payroll

    RMMC offers a full scope of small business services including check writing, billing and payroll preparation for our clients. Our staff is available to assume the daily accounting functions of small businesses to enable our clients to maximize their personnel usage and efficiency.

  • Audit and Attestation

    RMMC is proud to be a local leader in providing audit and attestation services to local businesses, governmental and not-for-profit agencies. Our financial statement assurance services go beyond ‘providing the reports’ to helping management understand and manage business risks.

  • Taxation

    The Firm strives to provide our clients with every opportunity to minimize their taxes within the framework of the law. From small issues to large, we utilize state-of-the-art research and training to ensure our clients receive the best, most timely advice and innovative tax planning strategies.

  • Technology

    From the smallest system to large vertical market applications, our staff is available to assist with setup, implementation and troubleshooting of your financial accounting systems. We assist clients in identifying the right software and hardware for their needs and work with them to ensure smooth operations so that key financial information is available when needed.

  • Financial Services

    Formulating effective strategies to enable our clients to enjoy their long-term goals is key to a successful personal or business financial plan. Our staff is committed to working with our clients to help them maximize their wealth through tax planning and compliance, retirement planning, estate planning and family wealth consulting

Avada Admin


Avada Admin
  • Construction

    Long recognized as experts in the construction accounting industry, RMMC provides services to many contractors, sub-contractors, and related entities in construction. From job costing and planning to operations improvement, from implementation of new technologies to multistate licensure, our staff works with our clients to ensure they are ready to meet the challenges of this growing industry.

  • Distribution

    Distributors bring their own special accounting needs to the Firm. As the link between manufacturers and customers, wholesale distributors offer marketing, financial logistical support to both suppliers and consumers. At RMMC, our goal is to work with our distributor clients to ensure the most efficient and cost-effective methods are utilized to address the ever-changing needs of this client base.

  • Real Estate

    RMMC brings over 20 years of experience in real estate investments to our clients. From developers to major landlords to the single rental property, the Firm utilizes our expertise in real estate to keep our clients up-to-date on the changing marketplace and to ensure our clients continue to grow with the Springfield region.

  • Government and Non-Profit

    Governmental and not-for-profit entities face a distinct set of challenges and rules that require specialized accounting certification and knowledge. Through our staff of trained governmental auditors we are able to understand the unique needs and issues facing our non-profit clients and assist them in providing accountability to their clients as well as achieving their long-term goals.

  • Transportation

    With our location in Southwest Missouri, RMMC has become experienced with a wide range of transportation industries. Our staff understands the specific accounting functions necessary to give our clients an edge in achieving quality results, such as driver compensation arrangements, multi-state taxation and regulation and the need for focus on cost controls and innovative approaches.

  • Hospitality

    Clients in the hospitality trades, particularly restaurants, lounges and hotels, have multiple cost centers such as facility maintenance, direct operations (servers, housekeepers, kitchen workers, bartenders, etc.), management and marketing.  Clients in these trades have special concerns including payroll, inventory management and usage ratios.  RMMC’s expertise in these areas can assist clients in ensuring their businesses retain the highest levels of profitability, even in the most trying of economic times.


RMMC Tax Resource Page

RMMC-CPA Tax Update Newsletter

(All files are PDF, click to download.)

Contact Us


  • Physical Address: 4035 S Fremont Springfield, MO 65804
  • Voice: 417.883.5348
  • Fax: 417.883.8961

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