BUSINESS HOURS
Mon-Fri: 9am to 5pm
Sat: Closed
Sun: Closed
ADDRESS
640 N. Tustin Ave. Suite 104
Santa Ana, CA 92705
(714) 400-9201
info@atsconsulttax.com
Sitio diseñado por Pasta Laboratorio Creativo ©2021
Our History
At our firm, we know ‘small business’ means family — whether it’s the small business itself or the families it supports.
Beginning in the 70’s, Aurelio and Gloria Alvarez started a local history of tax services preparing individual taxes within the Santa Ana community. Antonio and Maria Alvarez continued their work and founded ATS Consulting in 2001 to serve the small business tax needs of greater Orange County. While our team grew and our services expanded, our community values remain the foundation of our company. With the leadership of a third generation, ATS Consulting continues to be forward-thinking, adapting to change and focused on growth that benefits our staff and our clients.
At ATS Consulting, we view our client relationship as a partnership working hand-in-hand toward our client’s goals. Our staff prides itself in providing exceptional client service that draws upon advanced training, transparent communication and state-of-the-art computer technology. At our firm, we know that the measure of our success lies in the financial health and stability of our staff and clients, and we strive to succeed.
Vision
To be a leader amongst accounting firms for providing comprehensive tax, bookkeeping and professional services to small businesses in Southern California while simultaneously providing a working environment where our staff members can grow and thrive in their careers.
Mission
To provide expert financial and professional services that contribute to the growth and development of our clients’ goals. We aim to cultivate long-term success for our clients and build trusting and respectful relationships with both our clients and our team members. We value creativity and innovation, and we strive to create a work environment that promotes work-life balance for all.
Meet Our Team
ATS Consulting is built on the strength of our team.
With years of experience and expertise, our professionals are ready to help you.
Tony Alvarez, Jr.
Partner & Director of Operations
Tony Alvarez Jr. earned his BA in Business Administration with a concentration in Finance from CSU Fullerton in 2014. He is an Enrolled Agent and NTPI Fellow with 15 years of tax preparation and resolution experience with individual and business clients. Tony served as Director of the OC Chapter of the CSEA and is a member of the NAEA, NATP, and the ASTPS. As the managing partner at ATS Consulting, he oversees business operations, processes and technology enhancements leading the firm forward with client-centered ideas and care. He enjoys traveling with his wife and spending time with his rabbit.
Estefanía Alvarez
Partner & Director of Staff Resources
Estefanía earned her BA in English and Spanish with a minor in Human Rights from UC Davis in 2014. Before joining ATS, she worked in the nonprofit sector providing legal assistance to asylum seekers while organizing music and poetry events as a coordinator for various art organizations in Texas and Northern California. With her background and experience, Estefanía oversees business operations, directs and coordinates actions with ATS staff, and manages general company maintenance. She enjoys reading and plans to visit all fifty states with her royal poodle, Don Quixote.
Maria Alvarez
Partner
Maria Alvarez is an enterprising and visionary entrepreneur and earned her Bachelor’s degree from Universidad Autónoma de Juárez in Forest Engineering. With her experience in administration and planning, Maria created ATS Consulting’s Bookkeeping Department and has been a fundamental part in the growth and development of the company. Her focus is to help entrepreneurs grow their businesses and make the best professional and financial decisions to reach their goals. Maria enjoys spending time with her family, managing her real estate business, and developing her interior design venture.
Juan Carlos Araujo
Financial Strategy Advisor
Juan Carlos has over 15 years of experience in accounting and finance, and he is fluent in QuickBooks as a QuickBooks Online Certified ProAdvisor and Desktop Certified User. He earned his Bachelor‘s degree in Law, Associate in Accounting from Irvine Valley College, and his Business Analysis Certification from UC Irvine. Juan Carlos is passionate about helping entrepreneurs understand the importance of bookkeeping, finance, and planning. He enjoys traveling, trying new food and drinks, and enjoying his favorite holidays Christmas and New Year’s Day.
Michelle Cuevas
Account Manager
Michelle is an Enrolled Agent with eight years of experience in accounting and tax preparation for small and medium businesses. She is currently studying Business Administration with a concentration in Accounting. She enjoys music festivals and playing with her two rescue pitbulls Cindy and Clyde.
Marissa Dubon
Account Bookkeepers
Marissa is an Enrolled Agent and NTPI fellow with over a decade of experience in the tax field. She is certified in both QuickBooks Desktop and Online platforms. With her extensive background in accounting, Marissa is an integral asset to the ATS family. Marissa enjoys reading, spending time with family and friends, and doing volunteer work.
Lis Hernandez
Payroll Specialist
Lis joined the ATS team in 2021 as a Payroll Specialist. She earned her AA in Accounting and Business Administration from Santa Ana College, as well as her Certificate of Achievement in QuickBooks and her Fundamental Payroll Certification. Lis enjoys conquering new challenges and helping clients understand and maximize affordable payroll benefits.
Jovany Jaimes
Account Bookkeepers
Jovany joined the ATS team as a Junior Account Manager in 2024, building on 8 years of experience in the accounting field. He graduated with an AA in Business from Reedley College where he won the CalCPA scholarship for two consecutive years. He went on to complete his BA in Business Administration with a concentration in Accounting from CSU Fullerton in 2020. He is currently studying for his Enrolled Agent and CPA exams. Jovany enjoys training in Muay Thai and Boxing as well as spending time with his two Cane Corso’s.
Stephany Ramirez
Account Bookkeeper
Stephany joined ATS Consulting in 2021. She is one of the first points of contact for businesses seeking tax and accounting services and prides herself in providing a pleasant experience to each valued client. Stephany earned her Associate’s degree in Accounting from Santa Ana College in 2023. She is a Quickbooks Online Certified User and is currently pursuing her BA in Accounting at CSU Fullerton. For fun, she enjoys going to the park with her dog and discovering new beaches.
Wendy Guzman
Administrative Assistant
Wendy joined ATS Consulting in 2025 with a genuine passion for helping others and a strong background in tax and accounting services. She began her career supporting local communities, coordinated workshops, tax preparation sites, and information hotlines to better support taxpayers in the greater Orange County area. Wendy’s friendly approach and dedication to building lasting client relationships make her a valued part of the ATS team. When she’s not at work, Wendy enjoys spending time with her family and friends.