Senior Information Systems Security Officer – Technical Lead

Guidehouse

Senior Information Systems Security Officer providing cybersecurity guidance and leading audits for federal clients. Overseeing security compliance and mentoring junior staff within a comprehensive cybersecurity framework.

Posted 5/12/2026full-timeArlington • Virginia, Washington • 🇺🇸 United StatesSenior💰 $113,000 - $188,000 per yearWebsite

Tech Stack

Tools & technologies

AWSAzureCloudCyber SecurityGoogle Cloud PlatformSplunk

About the role

Key responsibilities & impact

Lead the implementation, assessment, and enhancement of NIST 800‑53 security controls across cloud, hybrid, and on Prem environments
Oversee RMF and ATO package development, review, and approval processes, including SSPs, IRPs, ISCPs, CMPs, and POA&Ms
Serve as a senior security advisor to system owners, program leadership, and regulatory bodies
Lead internal and external audit preparation, documentation, artifact collection, and response strategies
Conduct advanced risk assessments, architecture reviews, and system security analyses
Guide POA&M management and direct the remediation of vulnerabilities identified via ACAS, STIG, SCAP, and agency‑specific scans
Support continuous monitoring programs, change control reviews, and ongoing security lifecycle management
Mentor Junior and Mid‑Level ISSOs; contribute to process standardization and governance improvements
Review emerging threats and provide security recommendations to align systems with evolving federal and agency requirements
Mentor junior and mid‑level ISSOs and act as a technical escalation point for cloud engineering issues

Requirements

What you’ll need

Bachelor’s degree in Cybersecurity, Information Systems, Computer Engineering, or related technical field
Minimum of NINE (9) years of cybersecurity or secure systems engineering experience, including cloud architecture
An ACTIVE and CURRENT TOP SECRET federal or DOD security clearance
Strong understanding of security frameworks and compliance standards (e.g., NIST, RMF SP 800-53 Rev 5, DoD 8570)
Proven experience in designing and implementing enterprise security tools such as SIEM (e.g., Splunk), vulnerability scanners (e.g., Nessus), and endpoint protection platforms (e.g., Crowdstrike)
Secure configuration management and vulnerability lifecycle management
Advanced use of ACAS/Nessus, STIG Viewer, SCAP Compliance Checker
Experience with cloud security practices and technologies (AWS, Azure, GCP)
Demonstrated ability to lead cross-functional teams and complex technical projects
Strong analytical and problem-solving skills
Excellent communication skills with the ability to convey technical concepts to non-technical stakeholders.

Benefits

Comp & perks

Medical, Rx, Dental & Vision Insurance
Personal and Family Sick Time & Company Paid Holidays
Parental Leave
401(k) Retirement Plan
Group Term Life and Travel Assistance
Voluntary Life and AD&D Insurance
Health Savings Account, Health Care & Dependent Care Flexible Spending Accounts
Transit and Parking Commuter Benefits
Short-Term & Long-Term Disability
Tuition Reimbursement, Personal Development, Certifications & Learning Opportunities
Employee Referral Program
Corporate Sponsored Events & Community Outreach
Care.com annual membership
Employee Assistance Program
Supplemental Benefits via Corestream (Critical Care, Hospital Indemnity, Accident Insurance, Legal Assistance and ID theft protection, etc.)

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

NIST 800-53RMFATO package developmentrisk assessmentssystem security analysesvulnerability managementcloud architecturesecurity frameworkssecure configuration managementvulnerability lifecycle management

Soft Skills

leadershipmentoringanalytical skillsproblem-solving skillscommunication skillscross-functional team leadershipprocess standardizationgovernance improvements

Certifications

Bachelor’s degree in CybersecurityBachelor’s degree in Information SystemsBachelor’s degree in Computer EngineeringTOP SECRET security clearance