AASecure Fractional CISO Advisory

vCISO & Fractional CISO Advisory — Denver, CO

vCISO leadership, built from real-world security decisions

Security leadership shaped by advising CISOs across AWS's enterprise customer base, guiding Cognizant through the TriZetto acquisition, and building American Express Global Business Travel's security program through its divestiture — now available as your vCISO or fractional CISO, based in Denver and serving clients nationwide.

Book a Discovery Call See How vCISO Engagements Work
  • Strategic Advisor to Enterprise CISOsAWS
  • M&A Security Due DiligenceCognizant / TriZetto — $2.7B acquisition
  • Divestiture Security Build-OutAmerican Express Global Business Travel
Security Domains Identity & Access Management (IAM) · Security Information & Event Management (SIEM) · Cloud Security (AWS, Azure, GCP) · AI & Agentic Security Governance · Compliance (HIPAA, SOC 2, PCI DSS, ISO 27001, NIST 800-53/CSF, FedRAMP, GDPR, CCPA) · Security Architecture & Strategy · Governance, Risk & Compliance (GRC) · Incident Response & Digital Forensics · Vulnerability & Threat Management · Third-Party & Vendor Risk Management · Zero Trust Architecture · Data Security & Privacy · Business Continuity & Disaster Recovery · Security Awareness & Training · DevSecOps

Why a vCISO / Fractional CISO

Enterprise-grade security judgment, without the enterprise overhead

Most companies don't need a full-time CISO — they need someone who has already made the hard calls: what to fix first after a breach, how to pass due diligence before an acquisition, how to build a security program that survives a leadership transition. That's the experience a vCISO (virtual CISO) or fractional CISO engagement brings, at a fraction of the cost of a full-time executive hire.

I've sat on both sides of the table — advising CISOs at some of the largest enterprises in the world through my work at AWS, and personally leading security through two of the most demanding situations a security leader can face: a multi-billion-dollar acquisition and a corporate divestiture. That's the judgment I bring to every engagement.

"I've sat on both sides of the table — advising CISOs at some of the largest enterprises in the world, and personally leading security through an acquisition and a divestiture."

How We Work Together

Four ways to bring this experience into your organization

  • 01

    vCISO / Fractional CISO

    Ongoing strategic security leadership, scoped to your organization's needs.

  • 02

    M&A & Due Diligence Security Advisory

    Security and compliance due diligence for acquisitions and post-close remediation.

  • 03

    Board & Executive Security Advisory

    Board-level security guidance without a full-time hire.

  • 04

    Project-Based Security Advisory

    Scoped, time-bound engagements.

See Full Engagement Details →

Getting Started

How it works

  1. Discovery Call

    A no-pressure conversation about your security posture, goals, and fit.

  2. Scoped Proposal

    A clear engagement plan: hours, deliverables, and pricing.

  3. Onboarding & Engagement

    Direct, hands-on security leadership begins.

Industries

Where this experience applies

  • Healthcare & Healthcare ITHIPAA compliance, M&A security due diligence
  • Financial Services & Enterprise TravelDivestiture security build-outs, regulatory complexity
  • Enterprise Technology & CloudCloud security architecture, AI/agentic security governance

Let's talk about your security program.

Reach out at allenallison@aasecure.net or schedule a call directly.

Schedule a Discovery Call