Senior ISSO - On-Site Cyber Defense Lead (Vienna, VA)

Data Intelligence LLC; Vienna (VA); On-site; USD 130,000 - 180,000; Full time

Job summary

Data Intelligence, LLC is seeking a skilled Senior Information Systems Security Officer (ISSO) to support a top-tier federal client in national security and counterterrorism. This full-time on-site role is located in Vienna, VA and requires an active TS/SCI w/poly clearance.

The ISSO will secure complex IT systems and collaborate with government and contractor stakeholders to manage risk and defend against cyber threats.

Qualifications

• 5+ years experience as an ISSO or in information security leadership.
• Proven ability to implement security requirements and policy.
• Experience with government frameworks and standards (NIST, CIS, ISO).
• Active TS/SCI with poly clearance is required.
• Familiarity with risk management and incident response processes.

Responsibilities

• Implement, maintain, and enforce information systems security requirements, policies, standards, and procedures.
• Monitor system security posture, identify threats, coordinate incident response and remediation.
• Conduct security risk assessments, vulnerability assessments, and system scans.
• Configure, manage, and maintain cybersecurity tools incl. firewalls, IDS/IPS, SIEM.
• Analyze security monitoring data, logs, and vulnerability results to identify risks.
• Support compliance with FISMA and federal cybersecurity requirements.
• Apply security frameworks including NIST, ISO 27001, and CIS Controls.
• Develop, implement, and maintain internal security policies and procedures.
• Evaluate network architecture and configurations to identify security risks.
• Assess encryption technologies and key management practices.
• Evaluate security across Windows and Linux operating systems.
• Collaborate with teams to address findings and drive improvements.

Skills

ISSO expertise

Incident response

NIST / ISO 27001 / CIS Controls

FISMA compliance

Threat monitoring platforms

Firewalls / IDS/IPS / SIEM

Windows and Linux security

Encryption & key management

Security policies & risk assessments

Network protocols knowledge

TS/SCI with poly clearance

Education

CISSO / CISA / CISM / CISSP certifications

Tools

Firewalls

IDS/IPS

SIEM

Job description

Data Intelligence, LLC is seeking a skilled Senior Information Systems Security Officer (ISSO) to support a top-tier federal client in national security and counterterrorism. This full-time on-site role is located in Vienna, VA and requires an active TS/SCI w/poly clearance.

The ISSO will secure complex IT systems and collaborate with government and contractor stakeholders to manage risk and defend against cyber threats.