We Are Castro & Company
An innovative, reliable, and accomplished CPA firm
Who We Serve
Proudly Working with the Federal Government for over 20 years, including the following Departments and Agencies:
For over two decades, Castro & Company has solidified its position as a leading audit, advisory, and accounting firm in the heart of the Washington, DC, Metro area.
We serve as hands-on, trustworthy advisors to our clients with a methodology grounded in customized and innovative services. Our team’s work commemorates our country’s proud traditions; indeed, our track record demonstrates initiative, expertise, and outstanding results.
Primary NAICS Codes:
Castro & Company consists of passionate and seasoned professionals who approach each client’s needs with a proactive mindset. Every team member commits to going above and beyond in delivering outstanding services.
We believe compelling results are only possible through the latest industry procedures. Therefore, our ability to adapt to this versatile industry illustrates our commitment to excellence.
Our unwavering dedication to client needs and mission requirements has established our reputation as a reliable strategic partner. We share considerable trust and confidence with our clients because we prioritize their satisfaction.
Our Memberships & Affiliations
Member of the AICPA GAQC
Castro & Company is a proud member of the AICPA Government Audit Quality Center (GAQC), demonstrating our commitment to delivering high-quality services. We are also a licensed CPA firm in Virginia and the District of Columbia.
AGA Corporate Member
As a Corporate Partner, Castro & Company gains exclusive access to senior professionals and opportunities to promote excellent government management practices through research and publications.
Thomas Castro, CPA
Founder & Managing Partner
Mr. Thomas Castro has over 25 years of experience in public accounting with extensive experience providing Federal Government audit, advisory, & accounting services.
Millie Seijo, CPA
Ms. Millie Seijo has over 25 years of experience in public accounting, with extensive experience providing Federal Government audit, advisory, & accounting services.
Wayne Ference, CPA
Mr. Wayne Ference has over 30 years of experience in public accounting, exclusively providing Federal Government audit, advisory, & accounting services.
A CPA firm is only as good as its people. We proudly cultivate an environment of collaboration, encouragement, and diversity. Those seeking a fulfilling, challenging, and rewarding career will find one at Castro & Company.
In this age of rapid technological advancement, artificial intelligence has started to play a significant role in various fields including the realm of public accounting.
Imagine a workplace where it doesn’t matter the color of your skin, ethnicity, gender, age, culture, or physical limitations. A place where you’re celebrated for
NASA awarded contracts to six companies, including Castro & Company to provide agency-wide contract auditing support services.