John Hallman
Download PDFHighly analytical Cybersecurity Professional with a B.S. in Cybersecurity and Information Assurance and over six years of progressive IT experience spanning systems administration, network security, and infrastructure support. Proven track record in monitoring networks, analyzing security logs (SIEM), managing threat defense (EDR/MFA), and hardening perimeter firewalls. Experienced in vulnerability management, Active Directory administration, and incident response execution.
Experience
Deskside Support Technician
April 2026 – Present | Allied Digital (Vance, AL)
- Provide Tier 2 technical support for enterprise hardware, business apps, and core network connectivity across corporate endpoints.
- Diagnose and resolve system performance degradation, reducing downtime and maintaining target operational availability.
- Partner with infrastructure teams to remediate endpoint vulnerabilities, deploy system patches, and enforce compliance with baseline security policies.
I.T. Technician
Sept 2024 – April 2026 | Kronospan (Eastaboga, AL)
- Managed identities, user rights, and group policies via Active Directory and Microsoft Exchange, enforcing strict IAM and least-privilege standards.
- Maintained comprehensive infrastructure documentation, system change logs, and security runbooks.
- Monitored network systems for anomalous activity, maintained multi-factor authentication (MFA) layers, and supported perimeter security control integration.
Junior Network & Systems Administrator
Aug 2022 – Aug 2024 | Multimetco (Anniston, AL)
- Administered Microsoft 365, Defender, and Sophos endpoints; configured Conditional Access policies and enforced email hygiene.
- Hardened Windows Server and Linux environments, executed regular vulnerability assessments, and coordinated patch rollouts.
- Analyzed security event logs using open-source SIEM utilities (Graylog) to investigate, triage, and contain potential threats.
- Configured firewall Access Control Lists (ACLs), managed secure IPsec/SSL VPN tunnels, and validated VLAN routing boundaries.
Education
Bachelor of Science in Cybersecurity and Information Assurance
2022 – 2025 | Western Governors University
Certifications
CompTIA CySA+ ↗
CompTIA PenTest+ ↗
CompTIA Security+ ↗
CompTIA Network+ ↗
CompTIA A+ ↗
CompTIA Project+ ↗
Associate of ISC2 (SSCP)
* Holds CompTIA Stackable Designations including CSAP (Security Analytics Professional) & CNVP (Network Vulnerability Assessment Professional).
Technical Skills
Security & Defensive Ops
- Graylog SIEM & Incident Triage
- Microsoft Defender / Sophos EDR
- Vulnerability Assessment & Patching
- Conditional Access & MFA
- Identity & Access Management (IAM)
Networking & Systems
- pfSense & Firewall ACLs
- VLAN Routing & Subnetting
- Site-to-Site / Remote VPNs
- Active Directory & Microsoft 365
- Linux (Pop!_OS/Debian) & Windows Server
Infrastructure & Homelab
- Proxmox VE & LXC Containers
- Tailscale Mesh Networking
- AdGuard Home / DNS Sinkholing
- VS Code Remote Development
- Git / GitHub / Cloudflare Pages