Crimson Security
HQ: United StatesVerified
Reston, Virginia security compliance and assessment firm listed as a PCI Qualified Security Assessor (QSA) company and a HITRUST External Assessor; its site offers HIPAA-based assessments.
Audit firms in Reston
5 Verified · 1 registry-listed firms with an office in Reston, Virginia · Verified first · All auditors
These firms have a published office in Reston, Virginia. A firm may also have offices elsewhere. Listings are checked facts, not endorsements or rankings.
GuidePoint Security
HQ: United StatesVerified
Reston, Virginia cybersecurity services firm listed as a PCI Qualified Security Assessor (QSA) company; its site offers PCI DSS compliance services.
Intraprise Health
HQ: United StatesVerified
Reston, Virginia healthcare cybersecurity firm listed as a HITRUST External Assessor; offers HIPAA security and privacy assessments.
Kompleye
HQ: United StatesVerified
Reston, Virginia attestation firm listed for SOC, ISO certification, FedRAMP, HITRUST and CMMC assessments.
SecureIT
HQ: United StatesVerified
Reston, Virginia-based cybersecurity advisory and assessment firm; listed on the FedRAMP Marketplace as a recognized independent assessor (3PAO) since October 2013.
Excentium
HQ: United StatesRegistry-listed
Excentium appears on the FedRAMP Marketplace — recognized assessors (3PAO) as of 2026-10-27. This firm appears on the official registry, not independently verified by Agent Index.
Framework pages for this location
Related locations: United States · Virginia · McLean, Virginia · Arlington, Virginia · Norfolk, Virginia · Richmond, Virginia · Tysons, Virginia
FAQ
How many audit firms are listed in Reston?
5 Verified · 1 registry-listed firms have a published office in Reston, Virginia. Pages exist only where at least 3 Verified firms match. This is not a ranking.
Which registry listings do you check?
Firms on this page appear because an official registry listed them for at least one published framework (HITRUST, FedRAMP). Each firm page names the registry row and the date checked.
Which cities in Reston have the most listed firms?
Reston (6).
How do I get matched with a listed firm?
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