Pedro A. Rivera
Philadelphia,PA
Summary
Security-cleared Systems Engineer and Windows/Linux Administrator with 8+ years of experience supporting classified DoD and IC missions. Skilled in Active Directory, Group Policy, SPIR/NPIR networks, VMware/Hyper-V virtualization, and Linux/Windows server administration. Hands-on background in identity and access management, two-factor authentication, STIG/RMF compliance, and large-scale system administration (2,000+ VMs, 500+ servers). Experienced with system lifecycle management, configuration, and backup/disaster recovery in highly secure, mission-critical environments.
Overview
13
13
years of professional experience
1
1
Certification
Work History
Systems Engineer
Gnostech
08.2025 - Current
- Optimized networked software and operating systems by applying updates and patches.
- Maintained stability, integrity and efficient operation of information systems supporting organizational functions.
- Completed software updates and assessed security patches for optimized computer use.
- Verified compliance with applicable performance metrics and compatibility expectations.
Systems Engineer
Apex Systems / Lockheed Martin SPACE
03.2023 - 08.2025
- Administer Active Directory and Group Policy across six classified enclaves, enforcing STIG and RMF compliance.
- Managed 2,000+ VMs and 40+ physical servers in VMware and Hyper-V environments.
- Automated patching/configuration for 500+ Windows/Linux nodes using SCCM, Ansible, and PowerShell.
- Oversaw PKI enforcement, CAC two-factor authentication, and privileged identity management.
- Ensured 99.9% uptime and readiness of mission-critical systems.
- Facilitated audits, vulnerability remediation, and DISA compliance for secure data centers.
- Developed comprehensive engineering documents for all projects.
Senior End User Technician
CACI / Cybersecurity and Infrastructure Security Agency (CISA)
01.2022 - 01.2023
- Managed Active Directory accounts, group memberships, and privileged access across federal systems.
- Automated software deployment and system hardening via PowerShell/SCCM.
- Provided Tier 2/3 Windows/Linux support with strict SLA adherence.
- Supported installation and configuration of Windows laptops, printers, VoIP, and secure devices.
- Performed troubleshooting and diagnosis on malfunctioning equipment.
Systems Administrator
RPT Group Inc. / U.S. Air Force
01.2021 - 01.2022
- Maintained mission systems on SPIR/NPIR classified networks supporting tactical communications.
- Monitored and troubleshot servers, ensuring operational readiness in high-security environments.
- Performed preventive maintenance, system upgrades, and vulnerability remediation.
Communications & Systems Technician
United States Navy
01.2016 - 01.2021
- Administered and secured SPIR/NPIR networks, classified messaging, and cryptologic systems.
- Enforced Group Policy, performed patching, and maintained compliance for Windows/Linux servers.
- Provided Tier 2 network/system troubleshooting for classified satellite and tactical comms.
- Delivered training, continuity plans, and SOPs for secure communications.
Special Intelligence Communications System Operator
United States Navy
01.2013 - 01.2015
- Maintained 50+ classified messaging connections to JCS and Intelligence Community customers.
- Performed Tier 2 troubleshooting of network transmission issues, improving uptime and reliability.
- Supported Continuity of Operations Plans (COOP) and disaster recovery readiness.
Deck Seaman
United States Navy
01.2013 - 01.2015
- Managed maintenance projects on critical Navy vessel components (life rafts, cranes, life vests).
- Supervised a 3-person team, ensuring best practices, safety compliance, and mission readiness.
Education
B.S. - Cloud Computing
Western Governors University
Salt Lake City, UT07-2027
Skills
- Active Directory & Group Policy (GPO)
- SPIR/NPIR Network Administration
- Windows Server 2012–2019, Windows 10
- Red Hat, Rocky Linux, Solaris 10
- VMware ESXi, Hyper-V, iDRAC
- Identity & Access Management (PKI, CAC, SCCM)
- DoD STIG/RMF Compliance Vulnerability Remediation
- Backup & Disaster Recovery High Availability
- PowerShell & Ansible Automation
- Cisco Routing, JunOS, DNS, DHCP
- Monitoring: WhatsUp Gold (WUG), SCOM, Trellix ePO
- ServiceNow, Remote Device Management, VoIP
Certification
- CompTIA Security+ CE
- CompTIA A+
- Information Systems Technician (Class “A”) – 2016
- Transmission System Technician – 2019
- Journeyman Communications (JCC) – 2019
- Additional Navy Technical Schools: Electronic Equipment Repairman, Submarine Damage Control, Seaman, Infantry/Gun Crews
TECHNICAL ENVIRONMENT
- Operating Systems: Windows Server 2012–2019, Windows 10, RHEL, Rocky Linux, Solaris 10
- Directory Services: Active Directory, GPO, PKI, SCCM, Two-Factor Authentication (CAC)
- Virtualization: VMware ESXi, Hyper-V, iDRAC
- Networking: Cisco Routing, JunOS, DNS, DHCP
- Security & Compliance: STIG, RMF, Vulnerability Remediation
- Tools: Trellix ePO, WhatsUp Gold, SCOM, ServiceNow, VoIP, Remote Device Management
Timeline
Systems Engineer
Gnostech
08.2025 - Current
Systems Engineer
Apex Systems / Lockheed Martin SPACE
03.2023 - 08.2025
Senior End User Technician
CACI / Cybersecurity and Infrastructure Security Agency (CISA)
01.2022 - 01.2023
Systems Administrator
RPT Group Inc. / U.S. Air Force
01.2021 - 01.2022
Communications & Systems Technician
United States Navy
01.2016 - 01.2021
Special Intelligence Communications System Operator
United States Navy
01.2013 - 01.2015
Deck Seaman
United States Navy
01.2013 - 01.2015
B.S. - Cloud Computing
Western Governors University
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