Network Security Engineer (Firewall & Vulnerability Management)

VulnU; Washington (District of Columbia); Hybrid; USD 135.000 - 216.000; Vollzeit

Benefits dieser Stelle

Paid parental leave

25 days PTO

Zusammenfassung

Peraton is seeking an experienced Network Security Engineer in Washington, DC, with hands-on firewall and vulnerability management expertise. The role supports federal programs in a hybrid environment, mixing on-site and remote work days.

You will own technical deliverables from assessment through implementation, collaborating across IAM, patching, and cloud security disciplines. A strong background in Check Point, Palo Alto, and Defender suites is essential.

Qualifikationen

• Bachelor's degree required with 12+ years of relevant experience.
• Hands-on enterprise cybersecurity with vulnerability management and patching.
• Proven ability to configure and harden security controls in production environments.

Aufgaben

• Configure and harden firewall security policies and rules.
• Lead vulnerability remediation across on-prem, cloud, and VDI environments.
• Tune and integrate vulnerability scans with SIEM for insights and reporting.
• Manage patch deployment and server hardening across Windows and Linux.
• Produce runbooks, SOPs, and audit-ready documentation.

Kenntnisse

Firewall Security Engineering

Endpoint Security

Vulnerability Management

Cloud Security (AWS/Azure)

Security Hardening

SIEM & Monitoring

Ausbildung

Bachelor's degree

Tools

Check Point

Palo Alto Networks

Cisco

Microsoft Defender

Nessus

MECM/Ivanti/Jamf

Microsoft Entra ID/AD

Jobbeschreibung

# Network Security Engineer (Firewall & Vulnerability Management)Peraton · peraton.comCategory: Vulnerability ManagementLocation: Washington, DCSalary: $135,000 – $216,000Clearance: Public Trust## Quality of lifeWhat the posting states. Hover or tap a perk to see the line it came from.* Paid parental leave* 25 days PTOPeraton OverviewPeraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace. The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees do the can’t be done by solving the most daunting challenges facing our customers. Visit peraton.com to learn how we’re keeping people around the world safe and secure.ResponsibilitiesPeraton is currently hiring an experienced Network Security Engineer (Firewall & Vulnerability Management) with hands-on experience implementing security configurations for its’ Federal Strategic Cyber programs.Location: Washington, DCWork Arrangement: Hybrid – On-site Monday through Wednesday; up to two remote days per weekSecurity Requirement: Tier 2 Public TrustPosition OverviewWe are seeking an experienced, hands-on Network Security Engineer (Firewall & Vulnerability Management) to execute critical cybersecurity improvement initiatives within a hybrid Microsoft, AWS, and Azure federal enterprise environment.This is a project-driven cybersecurity engineering and implementation position, not a traditional security assessment, advisory, compliance, or steady-state security operations role.Serving as the single dedicated technical engineering resource, the selected candidate will independently execute ten security improvement projects spanning vulnerability management, endpoint protection, patch management, firewall and network security, identity and access management, and security governance.The successful candidate must demonstrate experience personally configuring, implementing, hardening, troubleshooting, and validating enterprise security technologies and controls. Responsibilities extend beyond identifying vulnerabilities and recommending corrective actions to directly implement approved security configuration changes, executing technical remediation, optimizing security platforms, and delivering measurable improvements to the organization's security posture.The engineer will take ownership of technical deliverables from initial assessment and solution design through implementation, testing, validation, documentation, and completion. The customer retains responsibility for risk acceptance and policy approvals, while the engineer is accountable for executing approved technical security improvements.The environment operates under federal cybersecurity requirements, including IRS Publication 1075, NIST SP 800-53 Revision 5, and the NIST Risk Management Framework (RMF).Key ResponsibilitiesVulnerability Assessment, Remediation & GovernanceConduct authenticated and unauthenticated vulnerability assessments across enterprise servers, endpoints, network devices, SQL Server, virtual desktop infrastructure (VDI), and AWS/Azure workloads.Directly implement and validate technical remediation activities, including secure configuration changes, system hardening, and vulnerability resolution.Develop a risk-based vulnerability prioritization matrix incorporating Common Vulnerability Scoring System (CVSS) ratings, asset criticality, and exploitability.Establish a comprehensive vulnerability remediation governance framework, including ownership models, service-level agreement (SLA) targets, remediation closure standards, and escalation workflows.Deliver a formal Vulnerability Remediation Governance Plan within the first 60 days.Drive vulnerability backlog reduction through root cause analysis of deferred findings, targeted remediation plans, direct technical remediation, and measurable burn-down tracking.Vulnerability Scanning Optimization & SIEM CorrelationConfigure, tune, and optimize Tenable Nessus vulnerability scanning policies and infrastructure.Troubleshoot and resolve credentialed-scan failures and eliminate scanning coverage gaps across on-premises, cloud, and VDI environments.Correlate vulnerability findings with Microsoft Sentinel, Varonis, and Splunk to validate results, identify discrepancies, and suppress false positives.Implement improvements to vulnerability scanning accuracy, effectiveness, and reporting.Develop and maintain dashboards and metrics for technical and executive audiences, including:Mean Time to Remediate (MTTR)Vulnerability agingPatch complianceSecurity exception trackingEndpoint Security & Server Patch ManagementConfigure, implement, and optimize enterprise patch management solutions using Microsoft Endpoint Configuration Manager (MECM), Ivanti, and Jamf.Design and implement patch deployment rings, maintenance windows, and automated patching workflows.Develop and execute risk-based Windows and Linux server patching plans.Implement endpoint and server security hardening measures to address identified vulnerabilities and configuration weaknesses.Prepare, submit, and track formal change requests, including implementation procedures, testing, validation, and rollback documentation.Update business continuity and disaster recovery documentation related to patch management activities.Firewall, Network & Cloud Security EngineeringDirectly configure, implement, and harden enterprise firewall security policies, including remediation of misconfigurations, overly permissive rules, deprecated objects, and unnecessary access permissions through approved change-control procedures.Work within the customer's existing Check Point firewall environment to assess, configure, implement, troubleshoot, and validate security improvements.Apply hands-on enterprise firewall engineering experience with Check Point, Palo Alto Networks, or Cisco technologies to support firewall security configuration, rule management, access controls, and system hardening.Configure, implement, and tune Microsoft Defender security policies for Windows and macOS endpoints in alignment with NIST SP 800-53 Revision 5.Assess, troubleshoot, and implement network security configuration improvements involving:Firewall rule sets and access control lists (ACLs)Network Address Translation (NAT)Domain Name System (DNS)Network segmentation and routingVirtual Private Networks (VPNs)Proxy servicesIntrusion Prevention and Detection Systems (IPS/IDS)Conduct AWS and Azure cloud security posture reviews and implement approved security configuration improvements.Assess Zero Trust Network Access (ZTNA) gateway configurations and recommend and implement appropriate security enhancements.Identity & Access Management (IAM)Configure, implement, and enhance Microsoft Entra ID and Active Directory security controls, including Conditional Access policies.Assess and improve Privileged Identity Management (PIM) configurations and Multi-Factor Authentication (MFA) enforcement.Identify and remediate identity and access management security gaps through approved configuration changes.Support penetration testing and red team exercises, including findings validation and technical remediation.Prepare formal Security Assessment Reports documenting identified risks, implemented remediation measures, and remaining security considerations.Technical Documentation, Reporting & Knowledge TransferDevelop and maintain comprehensive technical documentation, including:Security engineering runbooks and playbooksStandard Operating Procedures (SOPs)Secure configuration baselines and referencesTechnical implementation and validation proceduresKnowledge transfer and operational transition documentationPrepare and deliver weekly project status reports.Produce monthly patch compliance and vulnerability management reports.Provide critical vulnerability notifications in accordance with customer-defined SLAs.Document implemented security configuration changes, remediation outcomes, and technical deliverables to support operational continuity and audit readiness.Strong technical writing and documentation skills are essential functional requirements of this position.QualificationsRequired Qualifications:Education & Professional Experience:Bachelor's degree and 12 years of relevant experience. An additional 4 years of experience will be considered in lieu of the bachelor's degree.Must have a minimum of 5 years of hands-on enterprise cybersecurity experience, including vulnerability assessment, endpoint security, system hardening, and penetration testing.Demonstrated experience directly configuring, implementing, hardening, troubleshooting, and validating enterprise security technologies and controls.Proven ability to independently execute technical security improvement initiatives from assessment and design through implementation, validation, and documentation.Experience performing security configuration changes and remediation activities within production enterprise environmentsTechnical Skills & Experience: Must have strong hands-on implementation experience in and with:Firewall Security Engineering:Hands-on enterprise firewall configuration and implementation experience with at least one of the following technologies:Check Point firewallsor Palo Alto Networks or Cisco – acceptable alternativeDemonstrated experience personally configuring, modifying, implementing, troubleshooting, and validating firewall security policies, rules, access controls, and security hardening measures.Experience performing firewall security remediation and configuration changes within production enterprise environments using formal change-management procedures.Ability to apply existing firewall engineering expertise to the customer's Check Point environment.Endpoint Security & Vulnerability Management Tools:Hands-on configuration and implementation experience involving:Microsoft Defender: Endpoint protection configuration, policy implementation, and security tuning for Windows and macOS.Tenable Nessus: Vulnerability scan configuration, credentialed scanning, troubleshooting, and optimization.MECM, Ivanti, and Jamf: Endpoint management, patch deployment, configuration management, and automation.Microsoft Entra ID / Active Directory: Conditional Access, Privileged Identity Management (PIM), Multi-Factor Authentication (MFA), and identity security controls.Vulnerability Management, Remediation & Governance:Experience identifying, prioritizing, and directly remediating enterprise security vulnerabilities.Ability to develop remediation governance frameworks, patching workflows, ownership models, and escalation procedures.Experience implementing and validating security hardening configurations and remediation changes.Knowledge of formal change-management processes, including testing, implementation, rollback planning, and documentation.Experience developing technical runbooks, SOPs, and secure configuration documentation.Security Frameworks & Compliance:Working knowledge of:NIST SP 800-53 Revision 5NIST Risk Management Framework (RMF)Zero Trust security principlesIRS Publication 1075Security Monitoring & SIEM:Experience with at least one of the following:Microsoft SentinelVaronisSplunkScripting & Automation:Hands-on scripting experience using one or more of the following:PythonPowerShellC#Network & Cloud Security:Continue reading the full posting on Peraton's careers page →