Fifteen years leading enterprise security and AI governance that reduces risk exposure, strengthens market defensibility, and aligns security investment to shareholder value.
Now available to growth-stage companies by the month, not the decade.
Are you an MSP? I'm available as a 1099 vCISO contractor. Let's talk →
I'm Nathaniel Egharevba — CISM and AAISM-certified, 15 years at AVP level across banking, telecom, and technology. I advise growth-stage companies on building security and AI governance programs that scale without rebuilding.
My work translates technical risk into board-ready decisions, aligns security to business outcomes, and builds control frameworks that hold up under audit and acquisition scrutiny.
Most growth-stage companies need enterprise-grade security, not a full-time CISO salary. I provide the structure, reporting, and compliance readiness on a flexible model — scaling with your business, not against it.
Available to MSPs and channel partners as a 1099 independent contractor — plug-in vCISO capability without the overhead.
Building risk frameworks aligned to NIST CSF and ISO 27001 that turn threat exposure into decisions the board can actually act on.
Zero trust network architecture, micro-segmentation, and defense-in-depth strategies that embed resilience at every layer of the enterprise.
Security-by-design product leadership: delivering PCI-DSS, SOC 2, and regulated platforms without compromising speed or strategic intent.
NIST AI RMF-aligned governance covering responsible AI oversight, shadow AI risk, and lifecycle controls for organizations adopting AI at scale.
Translating security risk into decisions that matter to the business, not just the security team.
Establishing and maintaining enterprise security frameworks aligned to organizational strategy, risk appetite, and regulatory requirements.
Quantitative and qualitative risk assessment, treatment strategies, and continuous monitoring programs that protect enterprise assets.
Designing, building, and managing enterprise information security programs from policy creation to control implementation.
Incident response planning, crisis communication, forensics coordination, and post-incident improvement processes.
Translated technical risk posture into executive dashboards and leadership presentations aligned to business risk appetite.
Built security governance programs spanning engineering, risk, compliance, and operations across regulated banking and telecom environments.
Developed and aligned security policy libraries to NIST CSF and ISO 27001 across regulated banking and telecom environments.
Designed and ran security awareness programs that measurably changed security behavior across enterprise environments.
Advised leadership on AI risk management, NIST AI RMF implementation, shadow AI governance, and human oversight controls for enterprise AI adoption.
Formal accountability hierarchy ensuring security decisions flow from board risk appetite to operational execution.
Every exception requires documented business justification and formal risk acceptance within delegated authority limits.
I bring Fortune 500 governance discipline to growth-stage companies without the Fortune 500 overhead. Flexible engagement models designed for organizations building their security and AI governance function.
Limited to 5 concurrent engagements to ensure quality delivery. Also available to MSPs and channel partners as a 1099 independent contractor — plug-in vCISO capability, your clients get enterprise governance, your business gets a differentiator. No overhead, no hiring risk.
Current state, gaps, and risk exposure
Quick wins and critical control gaps
Policy, process, and governance frameworks
Compliance achievement and maturation
Governance frameworks, playbooks, and security artifacts built across regulated enterprise environments. These are real deliverables, not templates.
Comprehensive security strategy framework designed for regulated financial institutions, covering governance structure, control objectives, regulatory alignment (PCI-DSS, FFIEC), and executive risk reporting cadence.
✓ Deployed at AVP level across FFIEC-supervised banking — anchored a 40% reduction in post-deployment incidents.
A structured policy library covering information security policies, standards, and procedures, fully aligned to NIST CSF and ISO/IEC 27001 control objectives, designed for enterprise-wide adoption and audit readiness.
✓ Used as the policy foundation for a SOC 2 Type II engagement completed in 4.5 months with zero exceptions.
Enterprise IR playbook covering detection, containment, eradication, and recovery, with crisis communication templates, executive escalation paths, and post-incident improvement frameworks aligned to NIST SP 800-61.
✓ Contributed to MTTR reduction from 6 hours to 2.5 hours across a high-availability telecom platform.
A phased Zero Trust implementation roadmap covering identity-centric access, micro-segmentation strategy, least-privilege enforcement, and continuous verification, designed for large-scale enterprise environments.
✓ Designed for enterprise environments where perimeter-only security was creating unacceptable lateral movement risk.
Executive dashboard and board reporting template translating technical security posture, risk metrics, and control effectiveness into business-language narratives for C-suite and board consumption.
✓ Reduced board reporting prep from 3 days to under 4 hours — used across banking and telecom leadership teams.
Security governance workflow designs covering change management, access review cycles, third-party risk assessment, and exception management, embedded into enterprise ITSM and GRC tooling.
✓ Standardized across enterprise ITSM — contributed to 45% fewer escalations to senior leadership in 12 months.
A structured HIPAA Security Rule compliance framework covering Administrative, Physical, and Technical Safeguards — including risk analysis methodology, BAA governance, PHI data flow mapping, and audit control design aligned to 45 CFR Part 164.
✓ Applicable to covered entities, health-tech platforms, and any organization handling PHI under HIPAA/HITECH obligations.
A structured AI governance framework covering NIST AI RMF alignment, AI lifecycle risk management, shadow AI governance, responsible AI oversight, and enterprise AI risk assessment — designed for organizations adopting AI at scale.
✓ Applicable to organizations deploying generative AI, ML platforms, or AI-assisted operations requiring governance maturity and risk oversight.
A structured framework that maps an organization's security controls directly to cyber insurance underwriting requirements — identifying coverage gaps, hardening the technical control posture, and ensuring the policy reflects actual risk exposure. Covers MFA, EDR, backup integrity, incident response readiness, and carrier questionnaire preparation.
✓ Helps organizations secure coverage, reduce premiums through demonstrable control maturity, and avoid claim denials due to undisclosed gaps.
Third party risk governance from onboarding through continuous monitoring and offboarding — including AI vendor risk assessments, model trustworthiness validation, and AI procurement governance.
Real outcomes from enterprise security governance work. Measured in risk reduction, audit results, and organizations that kept running when things went wrong.
Challenge: Manual transaction workflows and fragmented controls were creating compounding operational risk in an FFIEC-supervised banking environment.
Approach:
Outcome: 85% workflow automation. 40% fewer post-deployment incidents. MTTR reduced from 6 hours to 2.5 hours.
Structured response and escalation paths ensuring severity-appropriate engagement and rapid containment.
Challenge: Inconsistent controls and weak runbooks were causing recurring incidents across a high-availability telecom platform with no unified risk framework.
Approach:
Outcome: Control maturity improved 2 levels in 12 months. 30% fewer recurring incidents. 45% fewer escalations to senior leadership.
Challenge: A platform serving millions of users lacked unified oversight, with disconnected cross-functional coordination and inconsistent operational prioritization.
Approach:
Outcome: Strengthened cross-functional coordination at enterprise telecom scale. Improved operational continuity through structured reviews and analytics-driven prioritization.
Challenge: A 180-person fintech needed SOC 2 Type II for Series C fundraising, but lacked documented controls or a risk framework.
Approach:
Outcome: SOC 2 Type II achieved in 4.5 months, zero exceptions. Enabled $45M Series C. Program now supports enterprise procurement.
These are not talking points. Every one came from a real situation where I had to make a call, defend a position, or hold the line under pressure.
Technology expresses policy, not the other way around. Every firewall rule and detection threshold should trace to a documented risk decision. I establish the control framework first, then deploy tools to enforce it.
Architecture without an agreed risk appetite is guesswork. The board owns the appetite. Security translates it into control objectives, detection thresholds, and investment priority.
Organizations that add resilience after incidents stay one breach behind. True resilience is designed in, embedded in culture, and tested against realistic scenarios before they occur.
Security that cannot speak business language stays underfunded. I translate risk into revenue exposure, regulatory liability, and strategic opportunity. The board responds to business impact, not CVE scores.
Effective security leadership requires technical fluency, not just framework knowledge. I understand the infrastructure I govern — firewalls, network segmentation, cloud, and detection operations — across regulated banking and telecom environments.
Identity-centric security architecture where no user, device, or system is trusted by default, regardless of network location.
In plain terms: Every access request is verified before it succeeds — identity confirmed, device checked, network authorized, and data scoped. No assumed trust, even inside your own walls.
Recovery objectives and continuity controls ensuring business process survival through disruption.
The credentials are current. The learning never stopped.
If you're preparing for compliance, navigating a security gap, or approaching a fundraise or acquisition — let's talk about what your business actually needs.
Thank you for reaching out. I'll review your request and respond within 1 to 2 business days.