About Us

Strategic Tax Planning & Business Advisory
for South Texas Entrepreneurs

Our Story, Mission & What Makes Us Different

Who We Are

Built for the Rio Grande Valley Business Community

We are a full-service Enrolled Agent firm built specifically for the Rio Grande Valley business community. Located in Edinburg, Texas, we serve small business owners, self-employed professionals, and established companies who are tired of reactive bookkeeping and ready for proactive financial strategy.

Our mission: help business owners across McAllen, Edinburg, and South Texas save tens of thousands of dollars in taxes every year through legal, fully compliant strategies — while protecting their assets and building long-term wealth.

Our Leadership

Juan Carlos Ontiveros, CEO
MBA & IRS Enrolled Agent

Ana Martinez, Senior Accountant
IRS Enrolled Agent

Enrolled Agent Firm

What Is an
Enrolled Agent?

The Highest Tax Credential the IRS Awards

An Enrolled Agent (EA) is a federally licensed tax professional — the highest credential awarded directly by the Internal Revenue Service. Unlike general tax preparers or seasonal employees, Enrolled Agents are authorized to represent clients before the IRS in audits, appeals, and collections nationwide.


When you work with O&M, you’re working with credentialed professionals who have demonstrated the highest level of tax expertise recognized by the federal government.

Why O&M Tax & Business Advisory​

Five Reasons Business Owners Choose O&M Over Every Other Tax Office
in the Rio Grande Valley

1. Proactive Tax
Strategy

Most tax offices focus on preparation. We focus on strategy — building, implementing, and adjusting a tax plan that legally minimizes what you owe year-round.

2. Bilingual Service
You Can Trust

Our team provides full professional service in English and Spanish. In a region where clear financial communication matters, nothing gets lost in translation.

3. Business-First
Perspective

We look at your entire business — entity structure, cash flow, growth plans — and create strategies aligned with where you're going, not just where you've been.

4. Beyond Compliance

Tax compliance is the minimum. We focus on building wealth — every recommendation is designed to increase profitability, reduce liability, and protect your future.

5. Deeply Local

We know the Rio Grande Valley — its industries, economy, and people. That local knowledge translates into strategies that are relevant and practical.

Our Commitment

What You Can Always Expect From O&M

Transparency

No surprises - ever. Clear pricing, clear communication, and clear results from day one.

Compliance

Every strategy we implement is 100% legal, fully IRS-approved, and built to withstand scrunity.

Partnership

We succeed when you succeed. Your growth is our goal - not just your annual filing.

Accessibility

Year-round support via phone, email, WhatsApp, and in-person meetings at our Edinburg office.

Results

We're not satisfied unless you're saving significant money and actively building long-term wealth.

Bilingual Support

Full professional service in English and Spanish for the South Texas business community.

We're available to assist you

Contact Us Today


Results

What You Can Expect

Common Clients Include: Medical and dental professionals, real estate agents and brokers, insurance agents, contractors, consultants, attorneys, and other service-based professionals across Edinburg, McAllen, and the Rio Grande Valley.

Visit Our Edinburg Office

4414 S. Raul Longoria Rd., Suite B, Edinburg, TX 78542

Ready to Work With a Tax Firm
That Actually Plans?

Schedule your free strategy session — most clients discover $15,000–$50,000+ in annual savings within the first call.