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7 results for Network Security Administrator in Bethesda, MD

Network Engineer

Manassas, VA
onsite
Temporary / Contract
58.957 - 68.266 USD / Hourly
We are looking for an experienced Network Engineer to support and enhance enterprise network operations in Manassas, Virginia. This Long-term Contract position focuses on maintaining secure, reliable connectivity across critical infrastructure while contributing to ongoing improvements in routing, firewall administration, and switching environments. The ideal candidate brings strong hands-on knowledge of Cisco networking technologies, Palo Alto security platforms, and Aruba solutions to help deliver stable and well-managed network performance. Responsibilities: • Manage and optimize network infrastructure that includes Cisco routing technologies, enterprise switching, and perimeter security platforms. • Administer Palo Alto firewalls and use Strata Cloud Manager to monitor performance, enforce security policies, and support ongoing operational needs. • Configure and support Aruba switching environments while leveraging Aruba Central for visibility, device management, and issue resolution. • Maintain and troubleshoot Border Gateway Protocol (BGP) configurations to ensure dependable routing and external connectivity. • Support Cisco ASA firewall environments by applying configuration updates, reviewing access controls, and resolving network security issues. • Diagnose network incidents, identify root causes, and implement corrective actions to minimize downtime and service disruption. • Collaborate with technical teams to plan, test, and implement infrastructure changes while maintaining network stability and security. • Create and maintain clear technical documentation for configurations, procedures, diagrams, and support activities.
2026-05-04T00:00:00Z

Network Engineer

Manassas, VA
onsite
Temporary / Contract
61.351 - 71.038 USD / Hourly
We are looking for a Network Engineer to support and enhance enterprise network operations in Virginia. This is a Contract position suited for a detail-oriented candidate who can manage routing, firewall administration, and switching technologies across a complex environment. The ideal candidate will bring strong hands-on expertise with Cisco infrastructure, Palo Alto security platforms, and Aruba networking tools while helping maintain reliable and secure connectivity. Responsibilities: • Administer and optimize network infrastructure built on Cisco routing technologies to ensure stable and efficient connectivity. • Manage Palo Alto firewall environments, including policy updates, security rule administration, and ongoing performance tuning. • Support cloud-based firewall oversight and operational visibility through Strata Cloud Manager. • Configure and maintain Aruba switching solutions while promoting consistent performance across the network environment. • Use Aruba Central to monitor devices, troubleshoot issues, and improve centralized network management. • Implement and support Border Gateway Protocol configurations to maintain resilient external and internal routing paths. • Maintain and troubleshoot Cisco ASA security appliances as part of the broader network security framework. • Investigate network incidents, identify root causes, and deliver timely resolutions to minimize service disruption.
2026-05-04T00:00:00Z

Information Security Engineer

Washington, DC
onsite
Temporary / Contract
55.66 - 55.66 USD / Hourly
We are looking for an Information Security Engineer to support the client’s cybersecurity mission. This role is responsible for designing, implementing, and maintaining secure systems that protect critical infrastructure and sensitive data across organization environments. The role will collaborate with federal leadership and cross-functional teams to strengthen endpoint security, mitigate threats, and ensure compliance with federal cybersecurity standards.This position operates in a highly complex environment, requiring independent decision-making, technical leadership, and the ability to translate security and business requirements into effective technical solutions. Key Responsibilities:· Design, configure, and validate secure systems and endpoint protection solutions.· Implement and manage Endpoint Detection and Response (EDR) tools.· Support integration of endpoint security data into SIEM/log aggregation systems.· Collaborate with application and infrastructure teams to troubleshoot security issues.· Participate in incident response and cybersecurity operations (SecOps) activities.· Enforce and implement security requirements aligned with FISMA and NIST 800 series.· Monitor emerging threats, vulnerabilities, and security best practices.· Work ServiceNow ITSM tickets through completion for security operations.· Participate in cybersecurity meetings and provide recommendations to enhance security posture.
2026-05-20T00:00:00Z

Systems Administrator

Washington, DC
onsite
Permanent / Full Time
95000 - 115000 USD / Yearly
We are looking for a skilled Systems Administrator to join our team in Washington, District of Columbia. This role involves managing and optimizing IT infrastructure to ensure seamless operations and security across the organization. The ideal candidate will bring a strong background in cloud platforms, virtualization, and network solutions. Responsibilities: • Oversee the administration and maintenance of Microsoft 365, Azure, and other cloud platforms to ensure optimal performance. • Configure and manage virtualization technologies such as VMware and Hyper-V to support organizational needs. • Implement and maintain endpoint security measures to safeguard systems and data. • Collaborate on the design and deployment of new network solutions to enhance operational efficiency. • Install, configure, and manage network hardware, including servers, routers, switches, firewalls, and wireless infrastructure.
2026-05-05T00:00:00Z

INFO SECURITY ANALYST IV

Columbia, MD
onsite
Temporary / Contract
52 - 57 USD / Hourly
Cybersecurity Test & Evaluation Engineer (FIPS / Cryptography)Employment Type: 6 month contract, Potential for Extension or Conversion Location: Columbia, MD (preferred) | Onsite/Hybrid as applicablePosition OverviewWe are seeking a Cybersecurity Test & Evaluation Engineer to support accredited testing and evaluation efforts aligned with FIPS 140 and Common Criteria standards. This role provides the opportunity to work in a hands-on lab environment, performing security testing and validation on products designed to support secure communications in highly regulated and mission-critical environments.This position is ideal for individuals with a strong foundation in cryptography, security testing, and software development, who are interested in working across a variety of technologies and contributing to high-impact security initiatives.Key Responsibilities<ul><li>Support FIPS 140 validation projects and related evaluation efforts</li><li>Perform security analysis, vulnerability testing, and system-level assessments</li><li>Conduct cryptographic and PKI testing, including algorithm validation</li><li>Evaluate products against established security standards and technology requirements</li><li>Execute physical security testing and architecture-level design analysis</li><li>Perform source code reviews to identify vulnerabilities and compliance gaps</li><li>Develop and execute test cases and automation scripts</li><li>Build and maintain test environments and supporting tools</li><li>Document and deliver technical reports and findings</li><li>Collaborate with cross-functional teams to support testing, validation, and documentation processes</li></ul>
2026-05-26T00:00:00Z

Systems Administrator IV

Washington, DC
remote
Temporary / Contract
50 - 55 USD / Hourly
Position OverviewWe are seeking a highly experienced Senior Systems Engineer to support enterprise infrastructure with a focus on Active Directory, authentication services, and certificate management. This role will partner closely with infrastructure leadership to design, implement, and maintain secure and scalable identity and directory services.The ideal candidate will bring deep expertise in Windows Server, Active Directory, DNS, certificate authorities, and authentication frameworks, combined with strong scripting capabilities and a proactive, problem‑solving mindset. This role requires ownership, collaboration across engineering teams, and the ability to operate in complex, multi-tiered environments. Key ResponsibilitiesIdentity & Directory Services<ul><li>Configure, maintain, and troubleshoot Active Directory, DNS, and Certificate Authority environments</li><li>Manage authentication systems including ADFS, SAML, SSO, and Okta</li><li>Administer certificate lifecycle management across enterprise systems</li></ul>Infrastructure Engineering & Automation<ul><li>Develop PowerShell scripts to monitor system health and automate operations</li><li>Support scalable infrastructure across physical, virtual, and cloud environments</li><li>Implement Group Policy and role-based access management</li></ul>Security & Compliance<ul><li>Apply NIST and DISA security standards and system hardening practices</li><li>Manage certificate issuance and ensure zero-downtime implementation</li><li>Apply patches, enforce compliance, and maintain system integrity</li></ul>Operations & Support<ul><li>Provide Tier II / III support in Windows Server and Windows 11 environments</li><li>Troubleshoot and resolve complex infrastructure issues</li><li>Maintain system documentation and architecture design artifacts</li></ul>Collaboration & Optimization<ul><li>Work closely with engineering, system owners, and cross-functional stakeholders</li><li>Identify process improvements and implement infrastructure optimizations</li><li>Support project delivery, timelines, and operational priorities</li></ul>
2026-05-12T00:00:00Z

Systems Engineer

Herndon, VA
onsite
Temporary / Contract
55 - 65 USD / Hourly
Robert Half Technology is seeking a Senior IT Systems Engineer to support a client in the aerospace and technology industry. This role will serve as a senior technical resource responsible for supporting and modernizing enterprise infrastructure across hybrid cloud and on-premises environments.The ideal candidate will have strong experience supporting Microsoft and cloud infrastructure environments, identity and access management, systems automation, security hardening, and enterprise operations across Windows, Linux, Azure, and AWS platforms. Duration: Contract-to-hireLocation: Hybrid in Greater Seattle AreaPay Rate: $55-$65/hourly Key Responsibilities<ul><li>Design, implement, and support hybrid cloud infrastructure across Microsoft Azure and AWS environments </li><li>Administer and support enterprise identity services including Active Directory, Entra ID (Azure AD), SSO, Conditional Access, MFA, and hybrid identity integrations </li><li>Support Windows Server and Linux environments across both on-premises and cloud infrastructure </li><li>Manage virtualization environments including Hyper-V and related infrastructure technologies </li><li>Develop and maintain automation and Infrastructure-as-Code (IaC) solutions using Terraform, PowerShell, Bash, and related tools </li><li>Implement security hardening, vulnerability remediation, patching, and secure configuration baselines across enterprise systems </li><li>Support enterprise networking and authentication infrastructure including DNS, DHCP, VPNs, firewalls, load balancing, and cloud networking </li><li>Partner closely with Information Security teams to support compliance initiatives, infrastructure resiliency, and operational security standards </li><li>Support Microsoft 365 technologies and endpoint management solutions including Intune and Autopilot </li><li>Build and maintain monitoring, alerting, logging, and operational documentation for enterprise systems </li><li>Troubleshoot complex infrastructure, authentication, and cloud-related issues across hybrid environments </li><li>Support disaster recovery, backup, and business continuity planning initiatives </li><li>Serve as a senior escalation point for infrastructure and systems-related incidents and operational support </li></ul>
2026-05-29T00:00:00Z