Years of Security & Network Experience
Career spans security engineering, network administration, LAN/WAN operations, penetration testing, help desk support, entitlement management, and classified DoD environments.
Security Engineering · Network Security · DoD Classified Environments · Ethical Hacking · TS/SCI
John
Nuncio
// Security Engineer · CCNP Security · SecurityX · Network Security · DoD Enclaves · CEH
TS/SCI-cleared Security Engineer with 10+ years of progressive experience designing, implementing, and securing enterprise networking infrastructures across classified DoD environments including NIPR, SIPR, and SECRET//REL. John’s background spans security engineering, network architecture, firewall management, penetration testing, access control, and service desk operations in high-stakes SOUTHCOM and federal environments. He combines hands-on technical depth with mission-focused execution, continuous learning, and strong leadership by example.
10+ Years Experience
TS/SCI Cleared
CCNP Security · SecurityX
CCNA · CEH
NIPR · SIPR · SECRET//REL
10+
Years of progressive experience across security engineering, network security, service desk operations, penetration testing, and classified DoD support
2,700+
Users supported across SOUTHCOM and partner-nation environments through entitlement management, access control, troubleshooting, and secure service delivery
8+
Years of U.S. Army service, including deployment to Iraq, shaping disciplined execution and mission-driven accountability
3
Core classified environments supported: NIPR, SIPR, and SECRET//REL
// 01
By the Numbers
Users Supported
Delivered Tier I and Tier II support, account administration, provisioning, and issue resolution for a large SOUTHCOM environment and partner nations.
Years of Military Service
Served in the U.S. Army as a combat veteran with deployment to Iraq, reinforcing mission focus, resilience, and operational discipline.
Years in Security Engineering
Recent experience centers on enterprise security operations, secure network architecture, firewall strategy, threat mitigation, and compliance-driven engineering.
// 02
Operational Highlights
Leads Enterprise Security Operations and Hardening
At Hotwire Communications, John leads security engineering initiatives for enterprise networks, strengthening critical infrastructure through firewall configuration, vulnerability assessment, secure architecture design, and continuous monitoring.
NGFW
Threat Mitigation
VPN Security
Compliance
Designed and Secured Mission-Critical DoD Networks
Across SOS International and Jacobs, he engineered and optimized classified enterprise networking environments supporting SOUTHCOM operations throughout the United States and South America, including NIPR, SIPR, and SECRET//REL enclaves.
SOUTHCOM
NIPR / SIPR
SECRET//REL
CAN/LAN/WAN
Supported 2,700+ Users in Classified Environments
In entitlement and service desk roles, John managed Active Directory administration, provisioning and de-provisioning, audit readiness, case ownership, and remote diagnostics across multinational support environments with strong customer communication and technical depth.
Active Directory
Access Control
ServiceNow
HEAT
Applied Offensive Security Tools to Reduce Risk
His penetration testing background includes vulnerability management assessments, client remediation guidance, technical control reviews, and use of tools such as Kali, Nessus, Metasploit, Nmap, Burp Suite, SpiderFoot, and SET.
Pen Testing
Nessus
Metasploit
Burp Suite
// 03
Experience
Jul 2022 — Present
Security Engineering · Firewall Strategy · Threat Mitigation
Security Engineer
Hotwire Communications Ltd · Miami-Fort Lauderdale Area
- Leads security operations and engineering initiatives for enterprise networks to protect critical infrastructure through advanced firewall configurations, threat mitigation, and continuous monitoring.
- Designs and implements secure network architectures supporting classified and commercial environments while maintaining alignment with DoD and industry standards.
- Collaborates with cross-functional teams to evaluate and harden controls, perform vulnerability assessments, and respond to emerging threats.
- Provides technical leadership for projects involving next-generation firewalls, VPN technologies, secure remote access solutions, mentoring, and process improvement.
Jan 2021 — Jul 2022
Network Engineering · SOUTHCOM · DoD Enclaves
Network Engineer (SOUTHCOM)
SOS International LLC · Miami-Fort Lauderdale Area
- Designed and implemented enterprise-wide CAN, LAN, and WAN infrastructures across multiple classified enclaves supporting operations throughout the United States and South America.
- Configured and maintained Cisco routers, switches, ASA 5500-X firewalls, CUCM, Aruba Mobility Controllers, TACLANEs, and COMSEC devices including KG-175 and KG-250.
- Deployed and troubleshot DMVPN, mGRE, BGP, EIGRP, IPsec, IKE, HSRP, EtherChannel, QoS, and NGFW solutions.
- Ensured secure connectivity and ongoing optimization for NIPR, SIPR, and SECRET//REL environments using SolarWinds Orion and Cisco ASDM.
Jun 2019 — Jan 2021
LAN/WAN Administration · Secure Communications · SOCSOUTH
Network LAN/WAN Administrator (SOCSOUTH)
Jacobs · Miami-Fort Lauderdale Area
- Administered and optimized LAN/WAN infrastructure supporting secure communications across classified and unclassified domains.
- Performed advanced troubleshooting, configuration, and maintenance of enterprise networking equipment in a fast-paced operational environment.
- Collaborated with stakeholders to implement network enhancements and resolve complex connectivity issues impacting mission operations.
- Maintained reliable, secure network performance through strong infrastructure optimization and compliance-focused execution.
Oct 2017 — Jun 2019
Service Desk · Entitlement Management · Access Control
Tier I / Tier II Service Desk Specialist & Entitlement Manager (SOUTHCOM)
C4 Planning Solutions · Miami-Fort Lauderdale Area
- Delivered Tier I and Tier II technical support to more than 2,700 users across SOUTHCOM and partner nations, resolving desktop, laptop, network, and peripheral issues.
- Managed Active Directory users, security groups, distro lists, provisioning and de-provisioning requests, terminations, and internal access audits.
- Provided remote diagnostic support for NIPR and SIPR environments while documenting resolutions and escalating complex cases as needed.
- Owned issues from initial case intake through full resolution, demonstrating strong communication, case management, and compliance discipline.
Oct 2016 — Oct 2017
Help Desk · Endpoint Support · Firewall & WiFi
Helpdesk Technician I
ADS Technology · Miami, Florida
- Worked within ConnectWise and remote support tooling to troubleshoot endpoints, connectivity, imaging, email, malware, printers, scanners, and cloud services.
- Handled Sophos UTM 9 firewall configurations, GFI content filtering, port forwarding, and spam service configuration.
- Supported Dell hardware, LAN/WiFi troubleshooting, Ubiquiti UniFi AP deployments, Netgear ProSafe switches, and Active Directory tasks.
- Used Acronis for creating and deploying images and supported Outlook configurations and remediation of user issues.
May 2016 — Aug 2016
Risk Advisory · Penetration Testing · Vulnerability Management
Risk Advisory / Penetration Tester
Eide Bailly LLP
- Participated in vulnerability management assessments and penetration tests while providing client-facing remediation recommendations.
- Identified areas of non-compliance, operational weakness, inefficiency, and technical risk.
- Assisted with technical control reviews surrounding vulnerability management and broader IT security consulting work.
- Worked with tools including Kali, Bomgar, Nessus, Metasploit, SET, Nmap, Burp Suite, SpiderFoot, and Fierce.
Jul 2005 — Sep 2013
Military Service · Combat Veteran · Mission Discipline
Combat Vet
U.S. Army · Deployed to Iraq
- Served more than eight years in the U.S. Army, including deployment to Iraq.
- Built a durable foundation in discipline, accountability, resilience, and mission-first execution.
- Military service continues to shape John’s leadership style, humility, and performance under pressure.
- Provides veteran perspective and composure in high-stakes technical and operational environments.
// 04
Credentials & Qualifications
Clearance
TS/SCI Cleared
Trusted to operate in high-security environments requiring discipline, confidentiality, and precise adherence to mission-critical standards.
Core Certifications
CCNP Security · SecurityX · CCNA · CEH
John’s profile reflects a strong blend of network security, routing and switching, ethical hacking, and advanced security engineering alignment.
Accumentum®
Fortinet NSE 4 · FortiOS 7.6 Administrator
Accumentum-listed training adds Fortinet administrative depth to John’s already strong security engineering and network defense profile.
Classified Environment Expertise
NIPR, SIPR, SECRET//REL, COMSEC, TACLANE
Demonstrated experience supporting secure enclave operations, encrypted communications, firewall strategy, VPNs, and mission-critical network resilience.
// 05
Technical Skills
// Security Engineering & Defense
Core Security Capability
Security EngineeringCore
Firewall ManagementAdvanced
Threat MitigationAdvanced
Compliance & Risk ManagementStrong
// Networking & Infrastructure
Enterprise Network Operations
CAN / LAN / WAN DesignCore
Routing & SwitchingAdvanced
VPN / IPsec / DMVPNAdvanced
Cisco / Aruba / TACLANEStrong
// Access, Support & Operations
Secure User Environment Support
Access ControlCore
Service Desk OperationsAdvanced
Active DirectoryAdvanced
Case ManagementStrong
// Offensive Security & Tooling
Assessment and Testing
Penetration TestingStrong
Vulnerability AssessmentAdvanced
Nessus / Metasploit / NmapStrong
Burp Suite / Kali / SETStrong
// 06
Let’s Put John To Work
Best aligned for security engineering, network security, secure enclave operations, firewall and VPN administration, penetration testing, access control, and mission-critical roles that require technical depth, clearance readiness, and disciplined execution in regulated or federal environments.
// 07
Education
Accumentum®
Fortinet NSE 4 · FortiOS 7.6 Administrator
Recent Accumentum training adds Fortinet administration capability that complements John’s enterprise firewall, VPN, and secure infrastructure experience.
Accumentum®
Cisco Certified Network Professional (CCNP) Security
Accumentum-supported CCNP Security preparation reinforces John’s advanced positioning in secure enterprise networking and defense-in-depth infrastructure support.
Boise State University
B.B.A. · Information Technology Management
Completed with a network management emphasis and a minor in Cyber Security, supporting John’s blend of operational networking and security expertise.
The Academy of South Florida
Associate’s Degree · Information Technology Professional / Networking and Security
Formal education in networking and security provides the technical foundation behind John’s work in enterprise infrastructure, secure operations, and classified environments.
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