Junior Security Engineer – TS/SCI

Xcelerate Solutions

. Perform day-to-day security activities under senior security personnel direction and escalate risks, technical issues, and blockers .

Posted 10/8/2026full-timeBethesda • Maryland • United StatesJuniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in vulnerability management, security control implementation, and compliance with NIST standards. Proficient in security monitoring and remediation across various operating systems and network environments.

Highest-signal resume keywords

Active TS/SCI ClearanceVulnerability ManagementNIST SP 800-53 ComplianceSplunk Security MonitoringSecurity+ CE Certification

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Vulnerability ScanningSecurity Control ImplementationNetwork TroubleshootingWindows Server 2016/2019Active Directory ManagementSTIG ImplementationMalware Prevention ToolsTechnical DocumentationSecurity Audit ReviewsRisk Assessment

Soft Skills

CommunicationCollaborationProblem-SolvingAttention to DetailAnalytical Thinking

Tools & Technologies

ACASTenable/NessusSplunkMS VisioMS ProjectMS ExcelMS WordMcAfee HBSSIISDNS

Certifications & Qualifications

Security+ CECCNA-SecurityGSECSSCPCISSPCASP

Industry Keywords

RMF/ATO ActivitiesBody of EvidenceContinuous MonitoringCompliance EvidenceTechnical Exchange MeetingsEncryptionData SecurityAudit Log ReviewsAccount ReviewsConfiguration Changes

Tech Stack

Tools & technologies

DNSLinuxSplunkTCP/IPTypeScript

About the role

Key responsibilities & impact

Perform day-to-day security activities under senior security personnel direction and escalate risks, technical issues, and blockers
Support vulnerability management from identification through closure, including analysis, remediation, validation, and documentation
Perform vulnerability scanning and analyze findings using ACAS, Tenable/Nessus, or equivalent technologies
Work with Windows, Linux, network, desktop support, and engineering teams on vulnerability remediation and security issues
Implement and validate DISA STIGs and approved security configuration baselines
Perform recurring security activities, including audit log reviews, account reviews, vulnerability reviews, security control validation, and continuous monitoring
Support RMF/ATO activities, security documentation, control evidence, Body of Evidence, POA&Ms, and compliance with NIST SP 800-53, ICD 503, and applicable security directives
Review system and configuration changes for security impact and document findings for senior security personnel and the ISSM
Support isolated or restricted environments through vulnerability scanning, logging, patching, hardening, and security monitoring
Review security logs and events using Splunk or equivalent SIEM/log-management technologies
Maintain security procedures, documentation, compliance evidence, and vulnerability remediation records
Track security findings, remediation activities, and action items through completion and provide status updates
Participate in security reviews, engineering meetings, and Technical Exchange Meetings
Research vulnerabilities, technical requirements, and remediation approaches and provide recommendations
Develop technical knowledge and take on increased security responsibility as proficiency grows

Requirements

What you’ll need

Active TS/SCI clearance with Polygraph required, or active TS/SCI and willingness to get a Poly
Bachelor's degree with at least 2 years of relevant experience; additional years of experience may be considered in lieu of degree
Experience with application performance and latency problems related to security requirements from front, middle, and back end
Working experience with Windows Server 2016/2019, Active Directory, IIS, DNS, DHCP, Exchange, and DFS
Experience implementing security controls on file, email, and Active Directory services across geographically dispersed sites
Experience with networking technologies and security assessment, including STIGs
Experience implementing and supporting enterprise system security and malware monitoring/prevention tools such as Splunk, McAfee HBSS, and ACAS
Network and systems troubleshooting experience with TCP/IP, Internet security, and encryption for data at rest and in transit
Ability to produce documents and diagrams using MS Visio, MS Project, MS Excel, and MS Word
Must meet DoD 8570.11 IAT Level II certification requirements, currently Security+ CE, CCNA-Security, GSEC, or SSCP with an appropriate computing environment certification
Preferred: CISSP or CASP certification

Benefits

Comp & perks

Growth and development opportunities
4.6-star Great Place to Work certification and 99% CEO approval Glassdoor rating
Reasonable accommodations for applicants or employees with disabilities