Daniel MacCarthy

[email protected] View PDF Resume

Network Security Engineer with hands-on experience securing enterprise and DoD-adjacent environments using Palo Alto firewalls, Zero Trust architectures, and network segmentation. Proven ability to monitor, analyze, and respond to security events while supporting compliance initiatives including CMMC Level 2 and Microsoft GCC-High migrations. Strong background in Cisco networking, virtualization, and Linux-based security operations.

Technical Skills

  • Cisco Routing & Switching (VLANs, STP, OSPF, BGP)
  • Network Configuration & Administration
  • Meraki Wireless Design & RF Optimization
  • Linux & Windows Server Administration
  • Virtualization (VMware)

Cybersecurity

  • Palo Alto & Cisco Firewalls
  • Zero Trust Architecture
  • Incident Response & Log Analysis
  • Network Access Control (NAC)
  • Security Policy Development

Certifications & Awards

  • CompTIA Security+
  • Best Paper – IEEE 13th CCWC
  • Best Presenter – IEEE 13th CCWC
  • National Cybersecurity Honors Society

Frequency Electronics Inc.

Uniondale, NY

IT Network Supervisor | Nov 2025 – Present

Lead the design and security of enterprise network infrastructure supporting CMMC Level 2 compliance in a DoD subcontractor environment. Implemented Zero Trust principles, VLAN segmentation, and Network Access Control to strengthen internal security and reduce lateral movement risk.

Supported the secure migration from on-prem Exchange to Microsoft GCC-High, assisting with environment hardening and access controls. Developed and audited Palo Alto firewall policies to balance threat prevention with operational availability.

Automated containerized deployment of internal AI chatbot solutions using Rasa/RAG architectures for isolated on-prem use. Integrated Linux systems with Active Directory, Duo MFA, and network shares, and managed VMware infrastructure and Veeam backups to ensure system availability.

99.9% network uptime Reduced security incidents Compliance-aligned architecture

Frequency Electronics Inc.

Uniondale, NY

Network Support Specialist | Jan 2024 – Nov 2025

Configured and maintained Cisco routing and switching infrastructure supporting enterprise operations. Troubleshot complex Layer 2 and Layer 3 issues involving VLANs, STP, OSPF, and BGP to improve reliability and security.

Designed and implemented Meraki wireless networks, including access point placement and RF optimization to ensure secure and consistent connectivity.

Faster incident resolution Improved wireless reliability

Marist College

Poughkeepsie, NY

Senior Lead Network Technician | Feb 2022 – May 2023

Managed Cisco ISE and DNA Center, optimizing network access control, policy enforcement, and automation Maintained and upgraded both wireless and wired networks across campus.

Ran fiber for and installed new Cisco distribution switches for each OSPF area on campus. Installed and maintained and helped configure various Cisco products: Access Points, Switches, and Firewalls.

Security Labs & Projects

Built and maintained an enterprise-style home lab using Cisco ASA firewalls, routers, switches, and access points to simulate segmented production networks. Implemented firewall rules, inter-VLAN routing, DHCP, DNS, and Active Directory for hands-on security testing.

Deployed a virtual Palo Alto PAN-OS firewall, configuring NAT, VPN tunnels, and threat inspection profiles to simulate SOC monitoring and policy enforcement scenarios.