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About Us

Businesses face challenges every day. Markets change, competition shifts, technologies evolve and customers demand more - and more quickly. You’re considering new business software to help solve these problems – and tomorrow’s problems as well. And you want to be certain you find the right partner to help you select, implement and leverage that software.

What makes DeRosa Mangold the right partner? We believe it’s a combination of business acumen, practical real-world experience, and extensive training - wrapped up with natural curiosity and a commitment to doing the right thing. In short, we’re a smart, talented bunch that understands that our success is a direct result of your success.

Mike DeRosa

Mike DeRosa

President / Founder


My first career developed into an Audit Manager position for Pattillo, Brown & Hill in Waco, TX. I was in public accounting for approximately 8 years. My audit specialty was State and Local Governments and Nonprofit entities. I also had expertise in airlines, banking and corporate holding.

My next career was Director of Finance for a large nonprofit organization, Center for Occupational Research and Development (CORD) in Waco, Texas that had a for-profit publishing manufacturing and distribution company. It was here that I chose MAS 90 (Level 1.x DOS) as the solution for this organization and performed my first implementation. I was in this position for just under 5 years.

After stabilizing the information system at CORD, I was looking for a new challenge and accepted a position with the re-seller that sold the MAS 90 system to me, MicroAccounting Solutions in Dallas, TX. They needed someone to manage their Austin, TX office and a Sales Consultant for Central and South Texas.

I left MicroAccounting in 1999 to start my own consulting company about a year after MicroAccounting was sold to a new owner. We started with no leads or clients and closed our first sale 90 days after starting. DeRosa Mangold Consulting today is a leader in Sage Intacct, Sage 100cloud, MAS 90 and MAS 200 solutions.

My goal is for our company to be the best Sage Intacct and Sage 100cloud service provider in the country, not necessarily the largest, but the most responsive that will bring all of our resources to bear, inside and outside of our company, to serve the client.

Liz Ortega emerged in 2000 at DeRosa Mangold Consulting after relocating back to Texas from California. She has previously worked with a variety of distribution and service companies from shipping and receiving to accounting. As a former user of MAS 90 and other professional accounting technology, Liz became an adequate fit for our company and naturally progressed to the technical side of the trade. On her off time, she enjoys keeping company with her family and fostering animals (mostly kittens) who are in critical need of care.

Liz prides herself on being someone who has a wide knowledge of the software packages she uses. Succeeding expectations with her ability to go above and beyond the norm to collaborate and guide those who require assistance.

Liz Ortega

Liz Ortega

Lead Consultant

Kelly Sappington

Kelly Sappington



Kelly Sappington came to DeRosa Mangold Consulting after operating her own consulting business. While she was searching for sub-contracting work, we snatched her up and, as they say, the rest is history. Having 15 years of experience, Kelly is a first-rate consultant who constantly challenges herself to stay one step ahead. She is resourceful and enjoys providing cost-effective solutions to everyday concerns. Kelly is most passionate about solving her client's issues to the best of her ability, and being able to walk away knowing that her customers are happy.

When she’s not working, Kelly enjoys spending time on her computer and giving to non-profits such as Faith Mission and Salvation Army. She is an avid believer in giving back to others who are less fortunate than herself in her community.

Mitzi Stockford came to DeRosa Mangold Consulting after running a Peachtree Support Center for ten years. She noticed the market changing and decided to move towards software such as Mas 90 but didn’t have the team to make that possible. After meeting Mike DeRosa 15 years ago she accepted an opportunity to join his firm and became an integral part of our team. One of the things Mitzi likes the best in this profession is the extensive variety of clients she gets to work with. Working with different temperaments, different industries, different experience levels keeps things ever changing and new

Mitzi Stockford

Mitzi Stockford



Tony Beck


Joining the DeRosa Mangold Consulting Team as of September 2018, Tony Beck comes from working several years in IT Support and Analytics. Tony was a former client of DeRosa Mangold having served as MAS 90 System Administrator as well as managing other ERP systems. Prior to joining the team, Tony held the position of Information Technology -Senior Business Analyst. This position performs as intermediary between business and technical resources around applications. In that role, Tony was able to apply his technical knowledge with his outgoing personality.

Tony now brings that experience to DeRosa Mangold Consulting as their Manager of Professional Services.

Gina Dickson joined the DeRosa Mangold Consulting team in November of 2018. She has had a successful accounting career spanning over 25 years that has crossed paths with Mike DeRosa and DeRosa Mangold Consulting over the years.
Gina’s first employment upon completing studies in accounting at Baylor University took place with Pattillo, Brown and Hill, LLP, under the supervision of Mike DeRosa. The experience as an auditor in public accounting brought about great exposure to multiple types of accounting systems and environments. Gina transitioned away from the public accounting arena by pursuing a role with CORD (Center for Occupational Research and Development). At the time, Mike DeRosa was the Controller, and offered her some flexibility in the workplace while Gina’s children were very young. This experience provided her first exposure to MAS 90 and Sage products. During the fifteen years with CORD she was promoted to Director of Finance and continued to choose MAS 90 as the solution for accounting needs.
Seeking new challenges, Gina left CORD to become Controller of PRUF Energy Solutions, a start-up LED Lighting manufacturing company. Implementing new accounting systems and procedures were tasks that provided both challenging and rewarding learning experiences. This allowed her to dive deeper into accounting as it relates to manufacturing processes and workflow. She remained in this position for seven years before taking on an adventure in the Franchising industry. As controller for Restoration 1 Franchise Holding, the fastest growing restoration franchise in the nation, the experience at PRUF Energy Solutions proved to be invaluable in understanding how to implement all new systems and procedures. The years of experience at Restoration 1 provided a greater knowledge and insight as to the changing needs and flexibility required in a fast growth accounting environment.
Gina is excited to bring years of accounting experience to DeRosa Mangold Consulting as their Client Success Manager and has a strong commitment to serve clients with the best accounting solutions to fit their individual needs.

Gina Dickson

Client Success Manager

Melanie Pitts

Melanie Pitts

Customer Account Manager


Melanie originated from the town of Lorena, Texas. A small town around 13 miles south from Waco, Texas where everyone knows everyone. She began her career at DeRosa Mangold Consulting after working for a previous client, when an employee at the time, noticed her knowledge of MAS 90. Melanie now is part of our core team at our headquarters in Waco. Her biggest character trait is her versatility to do whatever is deemed necessary. Her duties not only encompass being an office manager but also include AR, AP, controller, and our Human Resource person.

Out of the office, Melanie enjoys spending time with her family when she’s not working. She enjoys cooking and entertaining her friends and family or relaxing after a hard day’s work on her back porch.

Frankie McRay came to DeRosa Mangold Consulting after retiring from Channel View ISD as a clerk and certified teacher’s assistant. Now, after 8 ½ years of working for DeRosa Mangold Consulting Frankie is the first point of contact if you ever call us. Known for her understanding and friendly attitude to our customers her main goal is to get the help you need as quickly as possible. She wants to be remembered as the person who did everything she could to get you to the place you need to be.

Frankie is a people person and loves giving assistance to get the things people need to do their job. In her free time, Frankie enjoys painting landscapes and seascapes with oil paints or playing with her dogs a Great Pyrenees and a St. Bernard. She also is a BIG Elvis Presley fan and even named one of her dogs after him. If you ever call us be ready to laugh and smile, Frankie loves to talk to people and take care of our customers.

Frankie McCray

Frankie McRay

Dispatcher / Clerk


Heather Dudley

Marketing Director


Heather, a former 2nd grade teacher, became an entrepreneur when she developed the concept for a consignment bridal boutique in 2009. The experience of operating her company and eventually assisting with other family businesses lead her to develop a passion for long-term customer engagement and social media marketing. Over the years she has aided companies in various industries. She has now joined the team of DeRosa Mangold in order to assist customers in gaining the knowledge and education to better leverage their accounting software and meet the demands of their growing companies.

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Our Locations
Waco (Headquarters)
200 TX-6 #310
Waco, TX 76712
Phone: (254) 772-2980

Dallas / Ft. Worth
Dallas / Ft. Worth, TX 75308
Phone: (972) 720-1510

San Diego
San Diego, CA 92111
Phone: (661) 322-0005
1120 S Capital of Texas Hwy #120
Austin, TX 78746
Phone: (512) 419-0510

San Antonio
San Antonio, TX 78217
Phone: (210) 921-9766

Elkhart, IN 46571
Phone: (877) 772-2980