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Security Engineering · Network Security · DoD Classified Environments · Ethical Hacking · TS/SCI

John Nuncio

// Security Engineer · CCNP Security · SecurityX · Network Security · DoD Enclaves · CEH

10+ Years ExperienceTS/SCI ClearedCCNP Security · SecurityXCCNA · CEHNIPR · SIPR · SECRET//REL

TS/SCI-cleared Security Engineer with 10+ years designing, implementing, and securing enterprise networking across classified DoD environments including NIPR, SIPR, and SECRET//REL. Background spans security engineering, firewalls, penetration testing, and access control. Holder-asserted CCNP Security, SecurityX, and CEH.

CCNP SecuritySecurityXCEH
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// 01

By the Numbers

10+

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.

2,700+

Users Supported

Delivered Tier I and Tier II support, account administration, provisioning, and issue resolution for a large SOUTHCOM environment and partner nations.

8+

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.

4+

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

Security Engineering · Threat Mitigation · NGFW

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.

NGFWThreat MitigationVPN SecurityCompliance

SOUTHCOM · CAN/LAN/WAN · Classified Enclaves

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.

SOUTHCOMNIPR / SIPRSECRET//RELCAN/LAN/WAN

Access Control · Service Desk · Active Directory

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 DirectoryAccess ControlServiceNowHEAT

Ethical Hacking · Pen Testing · Security Consulting

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 TestingNessusMetasploitBurp 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.

Vendor certifications are holder-asserted.

// 05

Technical Skills

// Security Engineering & Defense

Security EngineeringCore · 95
Firewall ManagementAdvanced · 92
Threat MitigationAdvanced · 90
Compliance & Risk ManagementStrong · 87

// Networking & Infrastructure

CAN / LAN / WAN DesignCore · 94
Routing & SwitchingAdvanced · 91
VPN / IPsec / DMVPNAdvanced · 90
Cisco / Aruba / TACLANEStrong · 88

// Access, Support & Operations

Access ControlCore · 93
Service Desk OperationsAdvanced · 89
Active DirectoryAdvanced · 90
Case ManagementStrong · 86

// Offensive Security & Tooling

Penetration TestingStrong · 88
Vulnerability AssessmentAdvanced · 90
Nessus / Metasploit / NmapStrong · 87
Burp Suite / Kali / SETStrong · 85

// 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.

Content from this professional’s Accumentum Alumni Success Profile.

Credentials

Certifications are listed by the professional. Click Verify to confirm one with the issuing organization.

  • CCNP Security

    Cisco

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  • SecurityX

    CompTIA

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  • CEH

    EC-Council

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