Information Systems Security Officer – Senior Consultant
Apply Job ID 36581 Date posted 02/20/2026Job Family:
Cyber Consulting
Travel Required:
Clearance Required:
As a Senior Consultant in Guidehouse’s cyber practice, you will lead and execute core security compliance and RMF activities for classified federal systems. You will ensure systems maintain an appropriate security posture, support continuous monitoring, and assist with security assessments and incident coordination. You’ll combine hands on ISSO experience with client-facing consulting: translating mission risk into plans and actions, mentoring junior ISSOs, and advising stakeholders on compliance strategy, metrics, and governance. This blend reflects Guidehouse’s model where senior consultants drive client outcomes, contribute to business development, and support people development across the engagement.
What You Will Do:
The Information Systems Security Officer (ISSO) serves as the primary liaison between the system owner and the Information Systems Security Manager (ISSM). The ISSO is responsible for maintaining the appropriate operational security posture for assigned information systems and ensuring compliance with Federal Information Security Management Act (FISMA) requirements and Department security policies.
Responsibilities include, but are not limited to:
- Implement and maintain security controls for assigned information systems in accordance with NIST SP 800-53 and Department of Justice security standards
- Conduct continuous monitoring activities and coordinate security assessments
- Manage the Risk Management Framework (RMF) process, including system categorization, security control selection, implementation, assessment, authorization, and continuous monitoring
- Prepare and maintain System Security Plans (SSPs), Plans of Action and Milestones (POA&Ms), and other security documentation
- Coordinate incident response activities and ensure timely reporting of security incidents
- Conduct security awareness training for system users
- Review and approve system changes for security impact
- Serve as technical advisor to system owners on security matters, providing
- understanding of RMF, FISMA compliance, and federal security frameworks, and information security principles and practices
What You Will Need:
- Bachelor’s degree in computer science, Information Technology, Cybersecurity, or related field
- Active Top Secret clearance with SCI eligibility
- Minimum of SIX (6) years of experience in cybersecurity with THREE (3) in ISSO/RMF roles
- Strong understanding of security frameworks and compliance standards (e.g., NIST, RMF SP 800-53 Rev 5, DoD 8570).
- Current Security+ certification (or equivalent DoD 8570 IAT Level II certification
What Would Be Nice To Have:
- Master’s Degree in in computer science, Information Technology, Cybersecurity, or related field
- Certified Information Systems Security Professional (CISSP)
- Knowledge of cloud security (FedRAMP)
- Experience with security Tools (ACAS/Nessus, Splunk, etc.)
- Project management experience
What We Offer:
Guidehouse offers a comprehensive, total rewards package that includes competitive compensation and a flexible benefits package that reflects our commitment to creating a diverse and supportive workplace.
Benefits include:
Medical, Rx, Dental & Vision Insurance
Personal and Family Sick Time & Company Paid Holidays
Position may be eligible for a discretionary variable incentive bonus
Parental Leave and Adoption Assistance
401(k) Retirement Plan
Basic Life & Supplemental Life
Health Savings Account, Dental/Vision & Dependent Care Flexible Spending Accounts
Short-Term & Long-Term Disability
Student Loan PayDown
Tuition Reimbursement, Personal Development & Learning Opportunities
Skills Development & Certifications
Employee Referral Program
Corporate Sponsored Events & Community Outreach
Emergency Back-Up Childcare Program
Mobility Stipend
About Guidehouse
Guidehouse is an Equal Opportunity Employer–Protected Veterans, Individuals with Disabilities or any other basis protected by law, ordinance, or regulation.
Guidehouse will consider for employment qualified applicants with criminal histories in a manner consistent with the requirements of applicable law or ordinance including the Fair Chance Ordinance of Los Angeles and San Francisco.
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