Information System Security Officer (ISSO)

Job Family:

Cyber Consulting

Travel Required:

Up to 10%

Clearance Required:

Active Secret

What You Will Do:

• Design and implement technical security controls aligned with NIST RMF, NIST SP 800-53, and agency security architectures.
• Collaborate with system, network, and cloud architects to embed security requirements into system designs and architectures.
• Evaluate technical solutions for compliance with federal security standards and best practices.
• Support security testing, validation, and remediation of technical findings.
• Analyze vulnerability scan results and recommend engineered solutions to mitigate risk.
• Provide technical input to SSPs, diagrams, and architecture documentation.
• Support Assessment and Authorization (A&A) activities, including development and maintenance of System Security Plans (SSPs), Security Assessment Reports (SARs), and Plans of Action and Milestones (POA&Ms).
• Monitor and assess security controls to ensure continuous compliance with FISMA, OMB memoranda, and agency-specific GRC requirements.
• Review and evaluate disaster recovery and resilience capabilities, including backups, endpoint protection (EDR), web application firewalls (WAF), host-based firewalls, and application whitelisting.
• Conduct vulnerability assessments, password audits, malware detection, and intrusion monitoring.
• Review change management documentation to assess security impact across system lifecycle changes.
• Assess the security impact of system changes and new technologies.
• Support DevSecOps initiatives by integrating security controls into CI/CD pipelines where applicable.
• Author clear and concise risk narratives and briefings for government CISOs, Authorizing Officials, and external auditors.
• Support audits, inspections, and security assessments by internal and external stakeholders.

What You Will Need:
 

• Minimum of FIVE (5) years of experience in cybersecurity or information assurance.
• Bachelor’s degree in Cybersecurity, Information Technology, or a related field.
• Demonstrated experience applying cybersecurity principles to operational systems.
• Active and maintained DoD or Federal Secret clearance.
• One or more relevant cybersecurity certifications (e.g., CISSP, CISM, Security+).
• Ability to work full time on site in Washington, DC.

What Would Be Nice To Have:

• Experience with enterprise networking and security technologies, including firewalls, IDS/IPS, routers, switches, logging solutions, and endpoint security tools.
• Experience conducting risk assessments in cloud environments (AWS, Azure, Google Cloud).
• Strong written and verbal communication skills with the ability to communicate complex security concepts to non-technical stakeholders.
• Demonstrated ability to work independently and prioritize tasks in high-tempo environments.
• High Value Asset (HVA) assessment experience.

The annual salary range for this position is $113,000.00-$188,000.00. Compensation decisions depend on a wide range of factors, including but not limited to skill sets, experience and training, security clearances, licensure and certifications, and other business and organizational needs.

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 c