Cybersecurity
Advisory

Strategic Advisory

CISO-level guidance to mature your security posture and maintain continuous compliance.

• Regulatory Compliance (SOC 2, HIPAA, ISO 27001)
• Third-party Vendor Risk Management
• Executive Threat Modeling (STRIDE)
• Security Policy & Governance

Technical Defense

Hands-on engineering to secure your infrastructure and reduce day-to-day risk.

• Endpoint Security Engineering (EDR deployment and tuning, including CrowdStrike)
• Workload & Server Hardening
• Network Security Architecture & Segmentation
• Cloud Infrastructure Review (AWS / Azure IAM)
• Penetration Test Coordination & Remediation
• DevSecOps Pipeline Integration
• Custom SIEM Log Aggregation

Cryptography & PKI

The quiet foundation of everything else.

Certificates and encryption keys sit under every service you rely on. When they fail, everything fails. Expired certificates cause outages. Unmanaged certificates cause breaches. Most organizations can't say how many certificates they have, who issued them, or when they expire. We fix that.

• PKI Design & Deployment: Private CA architecture on AWS Private CA and Microsoft ADCS, including root and intermediate hierarchy design for RSA and ECC
• Certificate Lifecycle Management: Discovery, inventory, automated renewal, and ownership tracking so certificates stop expiring by surprise
• Public CA Management: Implementation and administration of Sectigo, DigiCert, and similar platforms
• Machine Identity Programs: Venafi, DigiCert, and Sectigo Certificate Manager deployment, integration, and troubleshooting
• PKI Health Assessments: Review of existing CA infrastructure against current best practices, with a prioritized remediation plan
• Crypto-Agility Planning: Structuring the environment so algorithms and certificate authorities can be swapped without rebuilding everything

Post-Quantum Readiness

Start the migration now. It takes years.

Quantum computing will break the encryption most organizations rely on today. Federal guidance (NIST's post-quantum standards and NSA's CNSA 2.0 timelines) already sets expectations for moving off RSA and ECC. Data stolen today can be decrypted later.

• Cryptographic Inventory: Identify where and how cryptography is used across applications, infrastructure, and vendors
• Quantum Risk Assessment: Prioritize systems by data sensitivity and exposure window
• Migration Roadmap: A phased plan aligned to NIST FIPS 203, 204, and 205 and federal timelines
• Executive Workshops: Briefings that help leadership understand the risk, timeline, and budget impact

AI Security

Your teams are already using AI. Is anyone securing it?

AI adoption is happening whether it is governed or not. This practice pairs with Yawstone's AI & Automation practice: that one builds it, this one secures it.

• AI Risk Assessments: Identify where AI tools and models touch sensitive data, and where the gaps are
• AI Governance & Acceptable Use Policy: Practical guardrails aligned to the NIST AI Risk Management Framework
• LLM Application Security Review: Assessment of prompt injection, data leakage, and access control risks in AI-enabled apps and agents
• Secure AI Adoption: Guidance on deploying AI assistants and automation without expanding the attack surface

Practice lead

Cosmos, CISSP  ·  Partner, Cybersecurity

Cybersecurity leader with deep experience in PKI, cryptography, and infrastructure security across large, regulated financial services enterprises. Holds a Master's in Cybersecurity and leads Yawstone's cryptography, post-quantum readiness, and AI security work.