Williams Adley

What Williams Adley does

Williams Adley (legal name Williams, Adley & Company-DC, LLP) is a privately-held, Washington, DC-based certified public accounting and management consulting firm founded in 1982 that specializes exclusively in serving U.S. federal civilian and defense agencies, with secondary exposure to state and local governments. The firm operates three core service lines: Audit and Assurance (financial audits, performance audits, and attestation engagements under GAO Yellow Book), Cybersecurity Risk Services (FISMA, FISCAM, SSAE 18, CMMC advisory, StateRAMP), and Management Consulting (financial management optimization targeting waste, fraud, and abuse in the federal sector).

The firm delivers services through pre-qualified federal contract vehicles including GSA OASIS Small Business Pool 2 (Contract GS00Q18OADS230), GSA Multiple Award Schedule (GS-00F-013DA, October 2025 through October 2030), and the District of Columbia Supply Schedule (CW107121), supplemented by direct Blanket Purchase Agreement awards such as a $150M ceiling award from HHS announced in June 2025. Its go-to-market is enterprise field sales against federal solicitations, often via teaming arrangements with larger primes such as Crowe LLP and specialty subcontractors. Headcount is approximately 100 professional staff (down from a historical 250 at the peak of HUD and FDIC engagements), and the firm is led by Managing Partner Kola Isiaq with a credentialed partner group (CPA, CGFM, CFE, CISA, CISSP, PMP).

Name

Williams Adley

Legal name

Williams, Adley & Company-DC, LLP

Website

https://williamsadley.com

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

51–100 employees

Short description

Williams Adley is a privately-held Washington, DC CPA and consulting firm founded in 1982 that provides government auditing, cybersecurity risk, and management consulting services to U.S. federal civilian and defense agencies through GSA contract vehicles.

Ownership category

akta.pro rank

Product category

Government Auditing and Consulting Services

NAICS

Offices of Certified Public Accountants (541211)

SIC

Finance Services (6199), Services-Management Services (8741)

akta.pro primary industry

Outsourced Finance & CFO Services (BPAHABAE)

Keywords

• Government auditing services
• Federal financial statement audit
• Cybersecurity risk advisory
• FISMA evaluation services
• Management consulting federal

Headquarters

HQ city

Washington

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Audit and Assurance Services: Providing financial audits, performance audits, and attestation engagements for government agencies as defined by GAO's Yellow Book for civilian and defense agencies
2. Cybersecurity Risk Services: Cybersecurity audit and advisory services including FISMA assessments, IT general controls, vulnerability assessments, and cybersecurity program development
3. Management Consulting: Financial management consulting, process optimization, and advisory services for government clients

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels8 records

Core offering

Williams Adley is a CPA and management consulting firm that delivers three core service lines to U.S. federal civilian and defense agencies: Audit and Assurance (financial audits, performance audits, and attestation engagements under GAO Yellow Book), Cybersecurity Risk Services or CRS (FISMA evaluations, FISCAM audits, SSAE 18 examinations, CMMC advisory, and StateRAMP authorizations), and Management Consulting (financial management consulting, process optimization, and audit remediation). Work is performed under government-wide acquisition contract vehicles such as GSA OASIS Small Business Pool 2, GSA MAS, and the DC Supply Schedule.

Product overview

Williams Adley is a professional services firm offering a portfolio of three core service lines: Audit and Assurance (financial audits, performance audits, and attestation engagements per GAO Yellow Book standards), Cybersecurity Risk Services (CRS, formerly ITRM - cybersecurity audits, FISMA evaluations, SSAE 18 examinations, FISCAM audits, CMMC advisory, and StateRAMP services), and Management Consulting (tailored solutions for complex financial problems in the federal sector). The firm serves federal civilian and defense agencies, state and local governments, and select commercial entities. The CRS practice was rebranded from ITRM in January 2024 to better reflect its cybersecurity focus and risk management foundation. The firm also produces the CyberStorm podcast as a thought leadership vehicle for its CRS practice.

Differentiator

Problem solved

Functional benefit

Products and services

• Audit and Assurance Full spectrum of financial audits, performance audits, and attestation engagements conducted under GAO's Yellow Book for federal civilian and defense agencies. Designed to provide value-added perspective and enhance financial management, operations, and accountability.
• Cybersecurity Risk Services (CRS) Cybersecurity audit and advisory services focused on risk management for federal agencies. Helps agencies assess cybersecurity posture, identify vulnerabilities and threats, and develop strategies to minimize and mitigate cyber risks. Encompasses FISMA evaluations, FISCAM audits, SSAE 18 examinations, CMMC advisory, and StateRAMP services.
• Management Consulting Tailored solutions for complex financial problems in the federal sector, focused on efficiency improvements and targeting waste, fraud, and abuse. Strategic advisory and process optimization delivered to federal clients based on long-standing trust relationships.
• FISMA Evaluation Services Federal Information Security Modernization Act (FISMA) audits and evaluations that assess agency cybersecurity programs, report on maturity ratings, and provide recommendations aimed at the root causes of identified weaknesses for federal civilian and defense agencies.
• SSAE 18 Examination Services Service Organization Control (SOC) examinations reviewing service provider systems to ensure compliance for federal clients, including SOC 1 reports for service organizations supporting defense agencies.
• CMMC Advisory Services Cybersecurity Maturity Model Certification advisory services helping Defense Industrial Base organizations achieve and maintain CMMC compliance to protect sensitive defense information from malicious actors.
• FISCAM Audits Federal Information System Controls Audit Manual examinations assessing information technology general controls and application controls for federal agencies.
• StateRAMP Services Cybersecurity assessment and authorization services for cloud service providers seeking StateRAMP authorization to do business with state and local governments.

Quantifiable outcome

• 21st consecutive unmodified audit opinion achieved for DFAS WCF
• +2 more outcomes

Named customers14 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Three partnerships are on record, tiered core.

• Crowe LLPcoreStrategic or Co-development Partner · 5 June 2025Teaming partner for the $150M HHS Blanket Purchase Agreement. Crowe brings notable expertise and proven track record in Federal contracting to support Williams Adley's service delivery for Department of Health and Human Services accounting and financial management services.
• NextStep Technology, InccoreStrategic or Co-development Partner · 5 June 2025Teaming partner for the $150M HHS Blanket Purchase Agreement. NextStep Technologies brings technical expertise to support Williams Adley's delivery of comprehensive accounting and financial management services to HHS.
• SummitcoreStrategic or Co-development Partner · 5 June 2025Teaming partner for the $150M HHS Blanket Purchase Agreement. Summit Consulting provides additional capabilities to support Williams Adley's service delivery for HHS financial management services.

Scale indicators10 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Councilor, Buchanan & Mitchell (CBM): CBM is a Mid-Atlantic CPA firm with a substantial government contracting practice providing audit, tax, and advisory services to federal agencies and government contractors. Directly comparable in size, geography, and service mix to Williams Adley.
• Kearney & Company: Kearney & Company is a direct peer — a CPA and financial management firm exclusively focused on the federal government, with deep DFAS, DoD, and federal civilian audit engagements. Closely comparable in service mix (financial audits, FISMA, advisory) and target customer base to Williams Adley.
• Cotton & Company (BDO USA): Cotton & Company is a leading federal audit and advisory CPA firm (now part of BDO USA) that competes head-to-head with Williams Adley on financial statement audits for federal agencies, OIG engagements, and grant compliance work. Comparable in scale and government-only focus.
• McConnell & Jones: McConnell & Jones is a Houston-based CPA and advisory firm with a federal services practice providing audit and assurance to federal agencies. Comparable mid-size government-focused CPA peer.
• RMA Associates: RMA Associates is a government-focused CPA and consulting firm providing financial statement audits, FISMA, and advisory services to federal agencies. Highly comparable small-business federal audit peer to Williams Adley.

Broad incumbents

• Booz Allen Hamilton: Booz Allen Hamilton is a major federal services contractor with a large financial management and cyber risk practice competing for the same HHS, DoD, and civilian audit and FISMA engagements that Williams Adley pursues. Broader scale and consulting portfolio make it an incumbent threat.
• Withum Smith+Brown: Withum is a Top-30 U.S. accounting firm with a Government Services practice providing audit, tax, and advisory to federal agencies and contractors. Larger and more diversified than Williams Adley but directly comparable on federal audit offerings.
• Cherry Bekaert: Cherry Bekaert is a Top-25 U.S. accounting and advisory firm with a Government Services practice providing audit, tax, and advisory to federal agencies and government contractors. Comparable in offering mix though broader in industry exposure.
• CliftonLarsonAllen (CLA): CLA is a top-10 U.S. accounting firm with a large government services practice including federal and state audits. Williams Adley's Senior Advisor Sal Ercolano joined from CLA, underscoring the close overlap; CLA is larger and more diversified across industries.
• Guidehouse: Guidehouse (formerly PwC Public Sector) is a major federal advisory firm providing audit support, financial management, and cyber risk services to HHS, DoD, and civilian agencies. Directly comparable on engagements like the HHS BPA but with significantly greater scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/WilliamsAdley
• Facebookfacebook.com/WilliamsAdley
• LinkedInlinkedin.com/company/williams-adley

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Williams Adley