Network Engineer with Security Clearance

Job Title: Network Engineer
Opportunity Type: Evergreen
Location: Arlington, VA (Onsite)
Clearance: Active Secret Clearance Required (TS/SCI Preferred)
Company: Quantum Science Solutions (QSS)
Compensation: Open Rate
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Position Overview
Quantum Science Solutions (QSS) supports mission-critical federal cybersecurity programs that provide onsite incident response services to civilian Government agencies and critical infrastructure organizations experiencing cyber-attacks.

These teams investigate security incidents, assess the severity of breaches, develop mitigation strategies, and assist customers with restoring affected systems and services. We are seeking a Network Engineer to implement, maintain, secure, and support network infrastructure within a technical lab environment. This position focuses on network design and administration, infrastructure integration, virtualization, enterprise storage, system security, and troubleshooting across complex lab environments.

The successful candidate will bring strong network engineering and systems administration experience to maintain reliable infrastructure, integrate new technologies, resolve complex technical issues, and ensure lab systems remain secure and available.
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Key Responsibilities

• Design, implement, maintain, and optimize network infrastructure supporting technical lab environments.
• Configure and administer routers, switches, firewalls, VPNs, and other network technologies.
• Assess network topology and device configurations to identify security vulnerabilities and recommend remediation strategies.
• Integrate new technologies, systems, and equipment into existing lab environments.
• Develop and maintain Standard Operating Procedures (SOPs), policies, and technical documentation.
• Provide technical support for Virtual Private Networks (VPNs), Virtual Desktop Infrastructure (VDI), Citrix, macOS, and iOS platforms.
• Troubleshoot and resolve network, system, and infrastructure issues ranging from routine problems to complex technical incidents.
• Implement and maintain granular access controls, backup protocols, and infrastructure security measures.
• Monitor network and system performance, availability, and accessibility.
• Diagnose and resolve enterprise storage issues across local and wide area networks.
• Support storage replication strategies and remediation of storage-related incidents.
• Configure, maintain, and update network devices while performing IP address audits and related network administration activities.
• Support virtualization environments and infrastructure optimization.
• Enforce system and network standards to maintain secure and reliable operations.
• Collaborate with technical teams and stakeholders to improve infrastructure performance and mission capabilities.

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Mandatory Skills

• U.S. Citizenship.
• Active DoD Secret Clearance (TS/SCI preferred).
• Ability to obtain Department of Homeland Security (DHS) Suitability.
• Five (5) or more years of directly relevant experience in network administration, network engineering, or related infrastructure environments.
• Strong knowledge of network administration and enterprise networking concepts.
• Hands-on experience configuring and maintaining routers, switches, firewalls, and VPNs.
• Proficiency administering multiple operating systems, including Linux/Unix and macOS.
• Experience supporting virtual desktop and virtualization environments such as Citrix and VMware.
• Experience troubleshooting complex network and infrastructure issues.
• Understanding of network security, access controls, system hardening, and infrastructure monitoring.
• Strong analytical and technical problem-solving skills.
• Ability to collaborate effectively with teams across multiple physical locations.

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Preferred Skills
Experience with two or more of the following:

• Palo Alto firewalls.
• Cisco switches and networking technologies.
• NetApp enterprise storage systems.
• Converged infrastructure solutions such as FlexPod.
• Cisco Intersight.
• VMware vCenter.
• Virtualization automation and infrastructure optimization.
• Network design, implementation, and performance tuning.
• Network device and infrastructure hardening.
• Enterprise storage, replication, backup, and recovery.
• Creating and maintaining network diagrams.
• Developing technical procedures and Standard Operating Procedures (SOPs).
• Project coordination and technical project management.

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Education
Bachelor's degree in Computer Science, Computer Engineering, Computer Information Systems, Computer Systems Engineering, or a related technical discipline.
OR
High School Diploma with seven (7) or more years of directly relevant experience in network administration, network engineering, or systems administration.
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Desired Certifications

• DoD 8140.01 IAT Level II
• CompTIA Network+
• Cisco Certified Network Associate (CCNA)

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Why QSS?
At QSS, you'll support mission-critical cybersecurity operations by maintaining the secure network and systems infrastructure that technical teams rely on every day. You'll work with a diverse range of networking, virtualization, storage, and security technologies while helping ensure lab environments remain reliable, secure, and ready to support critical operations.
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Benefits Include:

• Competitive compensation with annual performance bonuses
• Premium Medical, Dental & Vision coverage
• Generous PTO plus Federal Holidays
• 401(k) with company match