Cyber Security Systems Engineer with Security Clearance

VTG; Chantilly (VA); On-site; USD 150,000 - 190,000; Full time

Job summary

VTG is seeking a Cyber Security Systems Engineer to support customer A&A projects, with TS clearance and polygraph. You will liaison between technical teams and security stakeholders, and develop SSPs/CONOPS for RMF and ICD 503 processes.

Ideal candidates have 11+ years of experience in complex enterprise environments, proficiency with security documentation, and hands-on use of tools like Greenlight, Splunk, and Rapid7. This on-site role is based in Chantilly, VA.

Qualifications

• Bachelor's or Master's preferred in a related field; waiver for direct ISSE support.
• Top Secret clearance with polygraph is required.
• Extensive experience (11+ years) in security engineering and A&A processes.
• Proven ability to document controls, develop SSPs/CONOPS, and coordinate audits.

Responsibilities

• Translate complex security concepts to clear documentation for stakeholders.
• Support RMF/ICD 503 A&A activities across multiple network enclaves.
• Develop and maintain SSPs and CONOPS using tools like Greenlight.
• Collect A&A artifacts (CP, GUG, PUG, SOPs) and support SCA/ISSO during reviews.
• Coordinate across engineering, contractors, and program teams for security artifacts.
• Track POA&Ms and monitor A&A lifecycle including re-accreditation timelines.

Skills

Communication

Multitasking

Facilitation

RMF ICD503

ISSE experience

ISSO experience

Cloud security

Vuln mgmt

Security documentation

Education

Bachelor's or Master's degree (preferred)

Tools

Greenlight

RoadRunner

Rapid7

WebInspect

AppDetective

Splunk

AWS

Azure

VMware

VDI

PKI

STIG

Job description

Overview

We are actively seeking Cyber Security Systems Engineers to support the customer's Division level A&A projects which has several Branches within it. The A&A projects are therefore at various levels within the customer organization depending upon which team is responsible for initial development and accreditation vs. long term Operations and Maintenance support. Bachelor's or Master's Degree are preferred in one or more discipline but can be waived if previous direct ISSE support to this customer's agency.

What will you do?

• Serve as the primary liaison between technical teams and security stakeholders, translating complex technical concepts into clear security documentation and requirements
• Support multiple complex network environments involving shared infrastructure and multiple security enclaves
• Document security control implementations and gather supporting artifacts for RMF and ICD 503 Assessment & Authorization (A&A) activities
• Develop and maintain System Security Plans (SSPs) and CONOPS documentation using tools such as Greenlight
• Collect and compile A&A documentation including Contingency Plans (CP), General User Guides (GUG), Privileged User Guides (PUG), and Standard Operating Procedures (SOPs)
• Support Security Controls Assessors (SCA) and Information System Security Officers/Managers (ISSO/M) during A&A reviews and assessments
• Track and manage Plans of Action and Milestones (POA&Ms), including mitigation status and evidence collection
• Coordinate with engineering teams, contractors, and stakeholders to gather required security documentation and artifacts
• Navigate customer A&A processes to support Authorization to Develop (ATD), Interim Authority to Test (IATT), and Authority to Operate (ATO) approvals
• Monitor and track A&A lifecycle status across multiple projects, including re-accreditation and extension timelines Do you have what it takes?
• Must have a Top Secret Clearance with Polygraph
• Minimum of eleven (11) years' experience.
• Strong multi-tasking, communication, and facilitation skills with the ability to work across technical and non-technical audiences
• Experience working in complex enterprise environments with shared networks and multiple security enclaves
• Ability to understand and communicate technical implementation details in security and compliance terms
• Experience supporting RMF and ICD 503-based Assessment & Authorization (A&A) processes
• Experience developing and maintaining security documentation and compliance artifacts
• Familiarity with coordinating across engineering, security, and program stakeholders in a structured environment Preferred Education, Experience, & Skills:
• Prior experience as an ISSE supporting the customer environment
• Prior experience as an ISSO supporting enterprise security operations
• Experience with security and vulnerability management tools such as Greenlight, RoadRunner, Rapid7, WebInspect, AppDetective, and Splunk
• Experience working in cloud environments (AWS, Microsoft Azure, or similar platforms)
• Experience with virtualization technologies such as VDI and VMware
• Basic understanding of cloud security controls, PKI, STIG compliance, vulnerability management, and SecDevOps practices
• Certifications such as CISSP or GSLC
• AWS Certified Security - Specialty certification
• Proficiency with Microsoft Office 365 tools, including Excel for tracking and reporting