Cyber Security Systems Engineer (ISSE) (Expert)

Cyber Security Systems Engineer (ISSE) (Expert)

Insight Xcite is seeking a Cyber Security Systems Engineer (ISSE) at the Expert level for onsite work in Herndon, Virginia. Support RMF and ICD-503 assessment and authorization efforts, from initial system authorization through continuous monitoring.

Key Responsibilities

• Develop RMF and ICD-503 security documentation, including contingency plans.


• Gather and validate artifacts supporting security controls and closure of risk elements.


• Guide new systems through assessment and authorization phases toward an Authorization to Operate.


• Support continuous monitoring and convert risk findings into Plans of Action and Milestones (POA&M).


• Communicate technical and security requirements clearly with engineers, ISSMs, assessors, auditors, and other stakeholders.

Required Qualifications

• Minimum of 11 years of relevant ISSE experience.


• Demonstrated RMF and ICD-503 documentation, control evidence, A&A, ATO, continuous monitoring, and POA&M skills.


• Strong verbal and written communication, multitasking, and problem-solving skills.


• Ability to work independently and collaboratively.

Preferred Qualifications

• Bachelor’s or master’s degree in a relevant technical discipline.


• Coordination across leadership, project managers, and engineers for ATD, IATT, and ATO requirements.


• Security tooling and reporting using Greenlight, Rapid7, WebInspect, or Splunk.


• Public or private cloud experience with AWS, Google Cloud, Azure, or similar providers.

Clearance Requirement

Applicants must currently possess an active TS/SCI with Full-Scope Polygraph (FSP). Insight Xcite does not sponsor or process security clearances at this time.

Work Location

This position is onsite in Herndon, Virginia. Remote and hybrid work are not offered.

What We Offer

• 100% employer-paid medical, dental, and vision coverage for employees


• Flexible paid time off, subject to manager approval and business needs, plus annual Flex Bonus earning opportunities


• Annual compensation and performance review process


• 401(k) with immediate vesting and company contributions with no employee match requirement


• Insight Essentials lifestyle and wellness benefit


• Employee referral bonus program


• Professional development and career growth support

Candidate Authenticity and Use of AI

AI tools may be used to help format or draft application materials; all submitted information must accurately represent your own experience, qualifications, and work history. Be prepared to discuss and verify the information provided. Do not include classified or sensitive customer information.

About Insight Xcite

Insight Xcite is a mission-focused consulting firm supporting critical government programs through data-driven engineering, technology, cybersecurity, analytics, and operational expertise. We partner with customers across the national security community to deliver innovative solutions in highly secure, fast-paced environments.

Our teams are composed of experienced professionals who thrive on collaboration, accountability, and supporting mission success. We value technical excellence, integrity, and employees who are committed to solving complex challenges and making an impact.

The pay range for this role is:

170,000 - 230,000 USD per year (Government Client Site – Herndon VA)