Castro & Company, LLC

Castro & Company, LLC, doing business as Castro & Co LLC, is a minority-owned, Hispanic American-owned small business delivering financial audit, accounting, internal controls assessment, and compliance advisory services to federal civilian agencies as a prime contractor (97% of recent awards) and subcontractor on federal OIG and defense audits. Headquartered in Alexandria, Virginia, the firm operates as a limited liability company under primary NAICS 541512 (Offices of Certified Public Accountants) and NAICS 541219 (Other Accounting Services), competing predominantly under Total Small Business set-asides across its prime footprint, with a minority of work in competitive or unrestricted vehicles.

Castro & Company's customer concentration sits heavily with NASA and federal inspector general offices. The top five funding agencies—NASA Shared Services Center, Defense Contract Audit Agency, Federal Transit Administration, Department of the Treasury, and US Agency for Global Media—account for 47% of awards by count and a similar share by combined potential value. NASA dominates both dimensions: 68 awards valued at $166.4 million combined potential value stem from Castro & Company's incumbent position on the $55 million Contract Audit Support Services (CASS) IDIQ, where the firm has generated over 60 prior task orders performing incurred cost audits, cost accounting standards compliance reviews, and contract closeout audits for NASA contractors. Defense Contract Audit Agency places 31 awards ($8.3 million) for independent private auditor and public accountant services under the GSA Multiple Award Schedule. Recent representative work includes a $77.5 thousand NASA CASS delivery order for contract audit support to NASA Headquarters Office of Procurement (November 2026), a $4.815 million GSA Schedule BPA call from the Office of the Inspector General for review of OBBBA expenditures (September 2026), and a $2.59 million IRS delivery order for Inflation Reduction Act audit remediation services (May 2024).

Castro & Company holds multiple indefinite delivery vehicles that anchor its competition strategy. The firm sits on the GSA Multiple Award Schedule (173 task orders, $287.8 million combined potential value), the NASA Contract Audit Support Services IDIQ ($55 million ceiling, 60 prior task orders valued at $4.1 million), a Federal Railroad Administration A-123 Support BPA ($60 million ceiling, December 2024–December 2029), a $6 million Interior Department financial management support BPA (June 2025–June 2030), and the OASIS+SB IDIQ (awarded December 2024, no dollar ceiling specified in the source). The OASIS+SB vehicle carries a multi-billion-dollar ceiling and positions Castro & Company to compete for professional services across seven functional domains; the firm has received a $998 thousand Air Force delivery order for accounting operations support at Joint Base Andrews through September 2030 under this vehicle. Additionally, the firm maintains single or multiple-award BPAs with the Federal Trade Commission ($9.5 million ceiling), Millennium Challenge Corporation ($4.9 million), Pension Benefit Guaranty Corporation ($5.3 million original, extended to May 2029), NSF Office of the Inspector General ($5 million), and the Department of the Treasury ($1.57 million for internal control and enterprise risk management services). These vehicles reflect a strategy of anchoring work through set-aside IDIQs and agency-specific BPAs, with GSA Schedule serving as a secondary vehicle for competitive task-order placement.

SCI-reported federal service invoicing shows growth from $3.6 million in FY2022 (21.8 FTEs) to $14.9 million in FY2025 (48.8 FTEs), reflecting sustained expansion in staffing depth and utilization across the firm's federal practices. Median government-paid hourly rates on SCI-reportable contracts run around $105.46 per hour, with the 90th percentile at $173.77 per hour and senior labor pricing reaching into the low $170s and above. GSA Schedule labor rates span $98 through $296 per hour, covering staff through principal-level roles with bachelors' degrees and no security-clearance requirements. Castro & Company self-performs approximately 94 percent of contractor hours on SCI-reportable prime service contracts; across SCI prime work, subcontractors account for roughly 7 percent of total contractor hours on average, with 11 named subcontractors reported across the dataset. This profile indicates a company that builds its own delivery teams with minimal reliance on sub-scaling—consistent with the audit and accounting service model, which typically requires direct control over audit evidence and professional skepticism.

In its subcontractor role, Castro & Company supports major federal audit primes including KPMG (Department of Labor financial statement audits and FISMA audits for FY2026), Sikich CPA (Defense Security Cooperation Agency and US Transportation Command working capital fund audits), Ernst & Young (HUD and Air Force audits), and Eastern Research Group (EPA Inflation Reduction Act support). These engagements reflect the firm's position as a feeder of technical audit and accounting labor to large national audit firms undertaking federal OIG and defense audit work.

Recompete exposure is material: 32 awards (combined potential value $52.7 million) face ultimate completion within the next twenty-four months, driven primarily by task-order cycles on the CASS IDIQ, GSA Schedule, and agency-specific BPAs. Activity trajectory across the past five years shows consistent volume—ranging from 16 to 21 awards annually between 2022 and 2026—with no pronounced growth or decline, indicating stable market positioning within federal audit and compliance services for civilian agencies.

Castro & Company is an audit, advisory, and accounting services firm specializing in providing the personalized services of a small firm with the full resources and quality of larger CPA firms.