I'm Jerhyn. I have a background in electromagnetic spectrum operations and secure communications, As a developer I am self taught and specialize in developing infrastructure and software that stay secure, reliable, and responsive when the situation demands more.

• 💻 Full-Stack Development: C#, ASP.NET, SSO (OIDC/SAML), REST APIs, backend services, and responsive front-end interfaces
• 🛡️ Security-Focused Engineering: System hardening, defense-in-depth, least privilege, and compliance-first design
• 🔧 Infrastructure & Operations: Windows Server, AD/GPO, Hyper-V, VLAN segmentation, DHCP/DNS management, and client system provisioning
• 🌐 Network Architecture: Design and deployment of enterprise ready Cisco and UniFi networks, topologies, inter-VLAN routing, firewall rules, QoS policies, and segmentation strategies
• 🔐 Remote Access & Security: Site-to-site VPNs, reverse proxies, secure remote access solutions, and ZTNA principles
• 📦 Endpoint Management: Microsoft 365/Intune MDM/EntraID, configuration/compliance profiles, Windows update rings, and policy enforcement
• 🧩 Automation & DevOps: Docker, Linux system administration, PowerShell/Bash scripting, and CI/CD pipelines
• 📋 Compliance & Resilience: Implementation of system baselines, role-based access, patching workflows, and hardened OS images

I don’t just ship code; I build systems that scale, secure themselves, and survive chaos-prone environments.
Whether I’m writing software or standing up infrastructure, I engineer with purpose, precision, and adaptability enabling my work to thrive in even the most austere environments.

• Discord: ThatOneCodeDev
• Email: jerhynh@sentinelsec.studio

All content on this profile reflects my personal work and views, not those of any military or government entity.