Seiso Auditor Profile

Seiso is a cybersecurity and governance, risk, and compliance consultancy headquartered in Pittsburgh, Pennsylvania, with staff distributed nationwide. The firm's name is a play on "CISO" and the Japanese lean principle of cleanliness and order — a nod to its process-driven approach, and its team includes former CISOs, CTOs, and regulatory compliance specialists.

Seiso focuses on helping growing companies with small internal teams achieve and maintain compliance across ISO 27001, SOC 2, CMMC Levels 1 and 2, NIST CSF, NIST 800-171, and NIST 800-53, alongside cloud security and virtual CISO services.

As a consultancy rather than a CPA firm or certification body, Seiso handles readiness, gap remediation, internal audit, and ongoing program management, partnering with licensed auditors for formal attestations. It best serves regulated-industry startups and mid-market firms, including defense suppliers preparing for CMMC.