411 System Admin jobs in Dumfries,VA

SimVentions, Inc - Glassdoor✪ 4.6

Fredericksburg, VA 22405

Leidos

Lorton, VA 22079

Bachelors degree and (8)+ years of prior relevant experience or Masters with (6)+ years of prior relevant experience
Cisco Certified Network Professional (CCNP)
Engineering, Deployment and operations of LAN and WAN Switches, and Firewalls ensuring seamless integration into existing network infrastructure
Working knowledge of defense-in-depth principles, network/HW/SW security architecture, network topology, IT device integrity, and common security elements
Installs, configures, and maintain equipment including Cisco network and FW gear Cisco 2900, 4500, 9300, 9400, 6800 and Nexus 9000, and Cisco Firepower, ASA.
Experience with and proven methods for managing the information security incident lifecycle, including incident response, mitigation, post-action reporting, and mapping a path forward.
Network Management experience with Solarwinds, or WhatsUP Gold, NetQoS, NetBrain
Cross platform familiarity and experience with VMWARE, Linux, Microsoft Server and AD.
Build firewall policy and optimized rule sets for improved efficiency and threat prevention.
Deploy new network configuration to meet NIST/FISMA/STIG compliance requirements
Support ATO reviews and Audits
Ability to obtain DHS EOD SCI

L3Harris Technologies

Chantilly, VA 20151

Bachelor's Degree and minimum 6 years of prior relevant experience.
Graduate Degree and a minimum of 4 years of prior related experience.
In lieu of a degree, minimum of 10 years of prior related experience.
Must have active TS/SCI security clearance.
Ability to obtain and maintain Special Access Program (SAP) clearance after hire is required.
DoD 8140.03 Level 3 or 4 certification.
This position is performed 100% onsite and cannot be performed remotely.

U.S. Navy

Dumfries, VA 22025

ManTech

Stafford, VA 22554

ABC Imaging

Annandale, VA 22003

Dell

Manassas, VA 20110

Secret, TS/SCI required
Lead Solution Architect
On-premise private cloud ecosystem
Linux/Windows
Storage arrays
Software-defined networking
Unified communications (voice/video)
Infrastructure as Code (IaC)
GitOps-driven deployment strategy
Bare-metal provisioning platforms like Tinkerbell
Secure, and resilient infrastructure
Cross Domain Solutions (CDS)
Multi-level security enclaves
Scaled Agile Framework (SAFe)
Experience guiding cross-functional agile teams from architectural design through execution
Private Cloud Architecture & Integration: Design and oversee the implementation of a highly available, multi-tenant on-premise private cloud
Host enterprise Linux and Windows Server workloads at scale
Network Automation & S Architect automated provisioning workflows from bare-metal up to the hypervisor/OS layer using platforms such as Tinkerbell, Canonical MAAS, or similar IaaS provisioning tools
GitOps & Infrastructure as Code (IaC): Define, champion, and enforce a Git-centric (GitOps) deployment strategy
Infrastructure and OS-level configurations are version-controlled in Git and executed via automated, declarative CI/CD workflows
Cross Domain & DoD/IC Security: Architect