Senior Information Systems Security Officer

LinTech Global; Washington (District of Columbia); On-site; USD 100,000 - 130,000; Full time

Job summary

EmergencyMD is seeking a Senior Information Systems Security Officer to support cybersecurity efforts within the DHS in Washington, D.C. The position requires managing cybersecurity activities, ensuring compliance, and assessing security posture.

The ideal candidate will have at least 10 years of experience in cybersecurity, including expertise in A&A, FISMA compliance, and NIST security controls. A Top Secret Security Clearance is required for this role.

Qualifications

• At least 10 years of related experience.
• Experience with NIST 800 series and CNSSI 1253.
• Familiarity with security risk management practices.

Responsibilities

• Manage cybersecurity activities for assigned systems.
• Ensure systems maintain compliance with DHS requirements.
• Coordinate implementation of cybersecurity requirements.

Skills

A&A

FISMA compliance

IC cybersecurity policy

Continuous monitoring

Secure cloud engineering

Education

Bachelor's degree in a related field

Job description

Senior Information Systems Security Officer

Dexian Government Solutions is recruiting for a Senior Information Systems Security Officer to support our proposal effort for the DHS CIETS in DC Metro area.

Position Overview

Serves as DHS I&A's senior offensive security and technical assessment specialist. This position is responsible for identifying vulnerabilities, assessing system security posture, validating security control effectiveness, conducting penetration testing activities, evaluating software assurance risks, and providing actionable remediation recommendations across classified and unclassified environments. The Senior ISSO serves as the day‑to‑day cybersecurity lead for assigned systems and acts as the principal interface between system owners, program managers, system administrators, security engineers, ISSMs, and Security Control Assessors (SCAs). The position ensures systems remain compliant, authorized, and secure throughout their operational lifecycle.

Job Duties

System Security Management, the Senior ISSO shall:

• Manage cybersecurity activities for assigned systems.
• Ensure systems maintain compliance with DHS and Intelligence Community requirements.
• Monitor system security posture.
• Coordinate implementation of cybersecurity requirements.
• Provide ongoing security oversight throughout the system lifecycle.

RMF and Authorization Support, the Senior ISSO shall:

• Develop and maintain RMF documentation.
• Support Assessment & Authorization (A&A) activities.
• Maintain System Security Plans (SSPs).
• Assist with Security Assessment Reports (SARs).
• Manage Plan of Action and Milestones (POA&M) documentation.
• Support ATO and ongoing authorization efforts.
• The ISSO is typically the individual most directly responsible for maintaining authorization artifacts on a day‑to‑day basis.

Continuous Monitoring, the Senior ISSO shall:

• Execute continuous monitoring activities.
• Review vulnerability scan results.
• Track remediation actions.
• Support recurring security assessments.
• Ensure systems remain compliant between authorization cycles.
• Report security posture changes to leadership.

Vulnerability Management, the Senior ISSO shall:

• Coordinate remediation efforts with system administrators and engineers.
• Validate corrective actions.
• Maintain POA&M records.
• Monitor remediation timelines.
• Escalate unresolved cybersecurity risks.

Audit and Compliance Support, the Senior ISSO shall:

• Support cybersecurity audits and inspections.
• Provide evidence supporting compliance assessments.
• Respond to auditor requests.
• Support OIG and Intelligence Community inspections.

Security Control Management, the Senior ISSO shall:

• Verify implementation of required security controls.
• Coordinate control testing activities.
• Support Security Control Assessors during assessments.
• Validate remediation of identified findings.
• Assist in maintaining compliance with NIST and Intelligence Community control requirements.

Risk Management Support, the Senior ISSO shall:

• Identify and document cybersecurity risks.
• Participate in risk assessments.
• Coordinate with ISSMs and risk management personnel.
• Assist in preparing risk recommendations for Government review.

Stakeholder Coordination, the Senior ISSO shall:

• Coordinate with system owners regarding cybersecurity requirements.
• Support engineering and architecture reviews.
• Participate in change control activities.
• Support implementation of new technologies.
• Facilitate communication between technical and cybersecurity stakeholders.

Stakeholder Interaction, the Senior ISSO routinely interfaces with:

• Information Systems Security Managers (ISSMs)
• Security Control Assessors (SCAs)
• Security Risk Management Engineers
• Cybersecurity Engineers
• System Owners
• Program Managers
• System Administrators
• Authorizing Officials and their representatives

Required Qualifications

• At least two (2) years of recent experience in each of the following areas: A&A, FISMA compliance, IC cybersecurity policy and standards, continuous monitoring, CDS, and secure cloud and hybrid engineering, with a total of at least 10 years of total related experience.
• Experience in emerging and evolving security risk management practices including automating A&A and continuous monitoring activities.
• Experience in applying NIST 800 series and CNSSI 1253 security controls and risk management framework principles and guidance.

Certification Requirements

• CISM + CAP or GRC.

Clearance Requirements

• TS/SCI with CI Polygraph.

EEO Statement

Dexian Government Solutions is proud to be an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All employment is decided based on qualifications, merit, and business need.

All applicants will be considered for employment without attention to race, religion, color, national origin, ancestry, physical or mental disability, medical condition, pregnancy (including childbirth, lactation and related medical conditions), marital status, genetic information (including characteristics and testing), gender, sexual orientation, gender identity or expression, military and veteran status, or any other status protected under federal, state, or local law in the locations where we operate.

If you are an individual with a disability and would like to request a reasonable accommodation as part of the employment selection process, please contact Human Resources. The Company invites any applicant and/or employee to review the Company's written Aff… This plan is available for inspection upon request.

This role requires an active Top Secret Security Clearance, customer approval, and successful completion of a pre‑employment background screening.