Information Systems Security Officer in London

SAIC is seeking a Senior Information Systems Security Officer (ISSO) to support a critical U.S. government agency in the Hampton Roads area. This senior‑level role is responsible for ensuring the security and compliance of agency information systems by implementing and managing security controls aligned with federal cybersecurity frameworks, including the NIST Risk Management Framework (RMF), FISMA, and NIST SP 800‑53. This role will be directly involved in the accreditation, maintenance, and reaccreditation of the Authority to Operate (ATO) of multiple platforms, in direct support of the Information System Security Manager (ISSM) and senior cybersecurity leadership. This position is an in‑person on‑site standard work week in Hampton, VA with little to no remote work authorized.

Responsibilities

• Develop, implement, and maintain IT security controls in accordance with NIST SP 800‑53, RMF, and agency security policies.
• Support the preparation, review, and submission of Security Authorization packages, including the System Security Plan (SSP), Security Assessment Report (SAR), and Plan of Action and Milestones (POA&M).
• Coordinate and prepare systems for Security Control Assessments (SCA), ensuring all artifacts are accurate and complete.
• Conduct and document Security Impact Analyses (SIAs) for changes to hardware, software, cloud infrastructure, or connectivity.
• Participate in configuration and change control processes, ensuring secure baselines are maintained and reflected in documentation.
• Assist in system categorization and validate asset inventories to ensure appropriate control baselines are applied.
• Assess control implementation effectiveness and identify deficiencies for remediation or risk acceptance.
• Document business justifications and mitigation strategies for risk acceptance proposals for Authorizing Officials.
• Support Continuous Monitoring by reviewing security alerts, system changes, and compliance evidence to ensure ongoing authorization.
• Contribute to the development, revision, and enforcement of security policies, procedures, and technical guidelines.
• Participate in internal IT governance processes, including exception handling, standards reviews, and control waivers.
• Support security awareness and training compliance for personnel with system access.
• Monitor evolving threats and recommend adaptive security controls in response to risk landscape changes.
• Prepare high‑quality technical documentation, status reports, and risk briefings for internal and external stakeholders.

Qualifications

• Bachelor's degree and 9+ years of IT security or systems security engineering experience, or Master's degree with 7+ years of experience.
• Hold a current SECRET clearance with the ability to obtain and maintain a TS/SCI.
• Hands‑on experience implementing and managing security controls in enterprise or federal IT environments.
• Strong understanding of the NIST RMF, NIST SP 800‑53, FISMA, and federal security policies including EO 14028 and OMB M‑22‑09.
• Experience applying the above policies to environments or enterprises in all levels of classification.
• Experience performing risk assessments, preparing ATO documentation, and tracking control deficiencies in POA&M.
• Experience with GRC and SA&A tools such as eMASS or Xacta.
• Working knowledge of cloud security (AWS, Azure) and hybrid or multi‑cloud environments.
• Proficient in network and system security concepts, including IDS/IPS, VPNs, encryption, secure baselining, and OS hardening.
• Experience supporting third‑party security assessments or audits.
• Strong documentation, reporting, and communication skills, including the ability to convey complex technical issues to non‑technical audiences.
• Proficient in Office365 (Word, Excel, PowerPoint, etc.).

Preferred Qualifications

• Current cybersecurity certification such as CISSP, CISM, or SecurityX. CISSP Preferred.
• Familiarity with FedRAMP, cloud compliance requirements, and federal privacy regulations.
• Knowledge of OWASP Top 10 and modern application security best practices.
• Understanding of adversary TTPs and frameworks such as MITRE ATT&CK.
• Ability to work independently and manage priorities in a fast‑paced, dynamic environment.