Technologist · Systems Architect · Trusted Operator

Shaun A. Marshall

Infrastructure · Security · Agentic Engineering

30+ yearsCross-sector leadershipPreviously held Top Secret (SSBI)

Select a capability

Enterprise · Government · Defense · Nonprofit · Small business

Start a conversation Selected work

Core capabilities

From immediate recovery to long-horizon architecture.

Deep technical experience, translated into practical decisions and durable operating systems.

Protect

Security & Governance

Practical security architecture, policy, identity, incident readiness, and risk reduction built for how your organization actually operates.

Security architecture and hardening
IAM, OAuth2, SSO/SCIM, and RBAC
Disaster recovery and incident readiness
Policy, evidence preservation, and digital asset review

Operate

Infrastructure & DevOps

Resilient systems from workstation triage to virtualized, cloud, and bare-metal environments—with day-two operations designed in from the start.

Linux, LAMP/LEMP, and VPS architecture
Proxmox and virtualized environments
Network segmentation and secure remote access
Automation, monitoring, backup, and recovery

Amplify

Agentic AI & Automation

Local-first AI systems, governed pilots, and agent workflows that improve productivity without treating privacy or operational control as afterthoughts.

Local LLM and RAG architecture
Agent orchestration and tool governance
Secure workflow automation
Knowledge systems and human-in-the-loop operations

Advance

Technical Strategy & Recovery

Direct, experienced guidance for leaders, small businesses, and technical teams facing high-consequence decisions or difficult operational problems.

Executive technical advisory
Program and vendor management
Data recovery and digital forensics
Web presence and technology modernization

Operating principle

Security and maintainability are not finishing touches.

Understand the real constraint

Start with mission, risk, people, and day-two operations—not a fashionable product.

Design for controlled change

Prefer observable, reversible systems with clear ownership and least-privilege access.

Transfer capability

Document the system and enable the people who will operate it after the engagement.

Selected work

Public engineering and discreet client outcomes.

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Public research & tooling

Governed Knowledge Operations

A public pre-standard and supporting engines for preserving evidence, governing human and AI-generated information, and authorizing trustworthy use.

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Open-source engineering

Agentic Systems & Orchestration

Modular TypeScript systems exploring cognitive workflows, controlled tool use, memory architecture, and dependable multi-agent collaboration.

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Selected private engagement

Privacy-Preserving AI Architecture

Designed local-first, microservice-oriented AI workflows for sensitive records, emphasizing least privilege, controlled ingestion, auditability, and avoidance of unnecessary public-cloud exposure.

Engagement details intentionally limited.

Nonprofit transformation

Security-First Digital Foundation

Established infrastructure, identity, email authentication, knowledge systems, policy, automation, and operating practices for a distributed nonprofit organization.

Engagement details intentionally limited.

Enterprise operations

Executive Technology & Crisis Enablement

Delivered high-trust technical advisory, secure remote-work enablement, identity integrations, evidence preservation, and rapid response across complex enterprise environments.

Engagement details intentionally limited.

Let’s make the next decision count

Bring the problem. I’ll bring context, candor, and a path forward.

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