Top Professional Services Companies in Washington, DC (428)

Build what’s next — with tech that matters PwC provides professional services across Audit and Assurance, Advisory and Tax — powered by a global network of over 370,000 people in 149 countries. You may know us for our business expertise, but technology is core to how we help clients move faster, build trust and deliver meaningful outcomes. As a technologist, you’ll work...

The Pan American Health Organization (PAHO) is the specialized international health agency for the Americas, dedicated to improving and protecting public health through technical cooperation, disease control, and health system strengthening.

Legal Aid DC (the Legal Aid Society of the District of Columbia) is the District's oldest and largest general civil legal services organization. Since 1932, it has provided free legal advice and representation to low-income residents in Washington, D.C. The organization focuses on critical issues including housing, domestic violence and family law, public benefits, consumer law, and immigration to ensure...

The Better Business Bureau is a non-profit organization dedicated to fostering marketplace trust by setting standards for ethical business behavior and providing resources for consumer protection and dispute resolution.

Guardians of Honor, LLC is a minority-owned, economically disadvantaged woman-owned professional services firm and government contractor. The company specializes in delivering comprehensive support across multiple domains, including grants and events management, information technology, research and evaluation, logistics, conference planning, and STEM education programs. It provides strategic management and administrative solutions to federal agencies, ensuring high-quality program performance and operational excellence.

Volunteers of America is a faith-based nonprofit organization dedicated to helping those in need rebuild their lives and reach their full potential. It provides comprehensive human services, including affordable housing, healthcare, veteran support, and addiction recovery programs. With a network of affiliates across the United States, the organization empowers individuals and strengthens communities by addressing the physical, emotional, and spiritual...

The American Dental Education Association (ADEA) is the national organization representing academic oral health education. It brings together U.S. and Canadian dental schools, allied and advanced dental education programs, and thousands of professionals and learners. Its work includes research, advocacy, faculty and leadership development, meetings, news and publications, as well as application services for dental education programs. Its mission is...

Aspen Medical is a global provider of innovative healthcare solutions serving clients in the Defense, Mining, Oil & Gas, Government, and Humanitarian sectors. The company is a world leader in delivering healthcare services in various settings, particularly those that are remote, challenging, or under-resourced. They specialize in combining health workforce, facilities, and technology to deliver comprehensive healthcare solutions globally.

Education Strategy Group (ESG) is a mission-driven, national consulting firm founded in 2012 that partners with K-12, higher education, and workforce leaders to improve student success and expand economic opportunity and mobility. Working with states, communities, national organizations, and foundations, ESG helps design, align, and scale policies and strategies that increase educational attainment, strengthen education-to-career pathways, and advance equity and...

SHINE Systems is a professional services and consulting firm supporting government, defense, intelligence, and civilian missions. Founded as a decision-analytics consultancy, it delivers data analytics, technology integration, cybersecurity and IT, executive, mission, and programmatic support. The company develops actionable solutions, provides systems and infrastructure expertise, and supports national-security customers and federal agencies in the United States and internationally across diverse...

OVME is a national network of boutique medical aesthetic studios specializing in injectables, facials, laser treatments, and skincare, founded with a vision to redefine medical aesthetics as a more human, personalized experience.

The German Marshall Fund of the United States (GMF) is a nonpartisan, nonprofit American public policy and grantmaking institution. It is dedicated to strengthening cooperation between North America and Europe to address 21st-century global challenges. GMF advances its mission by conducting in-depth research, developing innovative policy ideas, building next-generation leadership, and convening global experts to shape the transatlantic agenda on...

Edgeworth Economics is a leading economic and quantitative consulting firm that provides economic analysis and expert testimony for clients facing complex litigation, regulatory, and other challenges.

GRSM (Gordon Rees Scully Mansukhani) is a nationwide law firm providing strategic legal guidance across more than 100 practice areas and industry groups. Its lawyers represent individuals and corporate clients in civil and criminal matters, internal audits and investigations, compliance programs, regulatory enforcement, grand-jury proceedings, litigation, and appeals. The firm’s 50-state platform comprises more than 2,000 lawyers and 85+ offices...

RailPros is a comprehensive provider of engineering, field services, training, and media production for the freight and transit rail industries. Founded in 2000 and headquartered in Irving, Texas, the company provides turnkey engineering, project/program and construction management, and flagging safety services to public and private customers throughout North America, ensuring safety and mobility for rail and transit carriers.

CNA is one of the largest U.S. commercial property and casualty insurance companies. Backed by more than 125 years of experience, CNA provides a broad range of standard and specialized insurance products and services for businesses and professionals in the U.S., Canada and Europe. As a company of allies, we understand the importance of fostering an inclusive and supportive culture...

GAP Solutions, Inc. is a professional services and technology firm founded in 1999 and headquartered in Herndon, VA. It provides specialized workforce, health, and mission-focused solutions to the Department of Defense, intelligence community, and federal civilian agencies. The company's expertise spans emergency management, public health initiatives, national security, and information technology services, aiming to promote and protect the health and...

Digital Consultants, LLC is a certified SBA 8(a) small disadvantaged business dedicated to empowering government and enterprise clients through end-to-end IT and cybersecurity services. Their mission is to deliver the highest level of professional solutions while serving as a trusted partner and advisor, driving secure and scalable digital transformation success for customers across the federal, civilian, and private sectors.

Forget what you think you know about professional services. We go beyond what’s expected and help others do the same. Grant Thornton is the U.S. member firm of Grant Thornton International Ltd, one of the world’s leading independent audit, tax and advisory firms. That means our network has more than 60,000 professionals in more than 135 countries who are ready to...

Griswold Home Care is an award-winning pioneer in the non-medical home care industry. The company provides personalized in-home services, including personal care, homemaking, companion care, respite care, and live-in or overnight care. Dedicated to compassion and integrity, Griswold helps seniors, individuals with disabilities, and those coping with illness remain independent, active, and healthy in the place they love.