Leidos
Overview
As a Senior Information Security Systems Engineer (ISSE), you will join a small team of security engineers providing Information Assurance (IA) Architecture Analysis and Security Engineering Support for the implementation and fielding of NC3-related capabilities, including National Leadership Command Capability in support of Nuclear Command, Control, and Communications (NC3), Continuity of Government (COG), and Senior Leader communications. The ISSE will perform in a consultant-like role, providing technical knowledge, expertise, and advice to our customer. Primary Responsibilities
The Senior ISSE shall deliver and lead threat-informed cybersecurity products – cybersecurity risk assessments, architecture reviews, and engineering guidance that bring sound, accurate, timely, and actionable service to mission partners. This includes: Conduct cybersecurity risk assessments and provide prioritized risk mitigation recommendations in support of the customer’s mission.
Support the design, implementation, and operation of real-time capabilities to discover, detect, analyze, and mitigate threats and vulnerabilities.
Analyze candidate architectures by evaluating against defined security requirements to identify security gaps, and provide recommended mitigation strategy.
Research and evaluate candidate emerging technologies to determine cybersecurity effectiveness.
Aid stakeholders through the development, refinement, delivery, and implementation of innovative solutions and capabilities.
Engage stakeholders to ensure security objectives, protection needs, security requirements and associated validation methods are defined.
Validates and verifies system security requirements definitions and analysis and establishes system security design.
Designs, develops, implements and/or integrates IA and security systems and system components including those for networking, computing and enclave environments to include those with multiple enclaves and with differing data protection/classification requirements.
Assist architects and systems developers in the identification and implementation of appropriate information security functionality to ensure uniform application of Agency security policy and enterprise solutions.
Contributes to the security planning, assessment, risk analysis, risk management, certification and awareness activities for system and networking operations.
Reviews C&A documentation, providing feedback on completeness and compliance of its content.
CLEARANCE REQUIRED : Active TS/SCI with polygraph. US Citizenship required. CCA cases may be considered. Qualifications
Bachelor of Science degree from an accredited university ideally in Computer Science, Information Assurance, Information Security System Engineering or related field with a minimum of 14 years of experience as an ISSE or System Engineer on programs/contracts with the customer space.
CISSP OR CASP certification required.
CISSP - ISSEP DoD approved 8570 baseline certification for Level.
Strong writing skills.
Confidence and ability to present briefing to senior DoD officials in both prepared briefings and/or ad hoc discussions.
Expertise in the Risk Management Framework (RMF) and conducting cybersecurity risk assessments.
Expertise in network technology and systems security engineering. Experience in identifying, researching, characterizing, and documenting security weaknesses related to operating systems, software applications, firmware, network hardware components, as well as network architecture design to identify protection needs and documented policies and procedures.
Experience developing and documenting system security requirements and conducting requirements gap analysis.
Experience with security monitoring and incident response capabilities.
Experience with emerging technologies such as Zero Trust, Cloud Computing, etc.
Knowledge of, and practical experience with the NIST SP 800 series, CNSSI 1253, and DoD 8500.
Ability to work independently within a schedule and with little direction.
Posting Details
Original Posting: June 26, 2025 Pay Range
Pay Range $126,100.00 - $227,950.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreements (if any), or other law.
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As a Senior Information Security Systems Engineer (ISSE), you will join a small team of security engineers providing Information Assurance (IA) Architecture Analysis and Security Engineering Support for the implementation and fielding of NC3-related capabilities, including National Leadership Command Capability in support of Nuclear Command, Control, and Communications (NC3), Continuity of Government (COG), and Senior Leader communications. The ISSE will perform in a consultant-like role, providing technical knowledge, expertise, and advice to our customer. Primary Responsibilities
The Senior ISSE shall deliver and lead threat-informed cybersecurity products – cybersecurity risk assessments, architecture reviews, and engineering guidance that bring sound, accurate, timely, and actionable service to mission partners. This includes: Conduct cybersecurity risk assessments and provide prioritized risk mitigation recommendations in support of the customer’s mission.
Support the design, implementation, and operation of real-time capabilities to discover, detect, analyze, and mitigate threats and vulnerabilities.
Analyze candidate architectures by evaluating against defined security requirements to identify security gaps, and provide recommended mitigation strategy.
Research and evaluate candidate emerging technologies to determine cybersecurity effectiveness.
Aid stakeholders through the development, refinement, delivery, and implementation of innovative solutions and capabilities.
Engage stakeholders to ensure security objectives, protection needs, security requirements and associated validation methods are defined.
Validates and verifies system security requirements definitions and analysis and establishes system security design.
Designs, develops, implements and/or integrates IA and security systems and system components including those for networking, computing and enclave environments to include those with multiple enclaves and with differing data protection/classification requirements.
Assist architects and systems developers in the identification and implementation of appropriate information security functionality to ensure uniform application of Agency security policy and enterprise solutions.
Contributes to the security planning, assessment, risk analysis, risk management, certification and awareness activities for system and networking operations.
Reviews C&A documentation, providing feedback on completeness and compliance of its content.
CLEARANCE REQUIRED : Active TS/SCI with polygraph. US Citizenship required. CCA cases may be considered. Qualifications
Bachelor of Science degree from an accredited university ideally in Computer Science, Information Assurance, Information Security System Engineering or related field with a minimum of 14 years of experience as an ISSE or System Engineer on programs/contracts with the customer space.
CISSP OR CASP certification required.
CISSP - ISSEP DoD approved 8570 baseline certification for Level.
Strong writing skills.
Confidence and ability to present briefing to senior DoD officials in both prepared briefings and/or ad hoc discussions.
Expertise in the Risk Management Framework (RMF) and conducting cybersecurity risk assessments.
Expertise in network technology and systems security engineering. Experience in identifying, researching, characterizing, and documenting security weaknesses related to operating systems, software applications, firmware, network hardware components, as well as network architecture design to identify protection needs and documented policies and procedures.
Experience developing and documenting system security requirements and conducting requirements gap analysis.
Experience with security monitoring and incident response capabilities.
Experience with emerging technologies such as Zero Trust, Cloud Computing, etc.
Knowledge of, and practical experience with the NIST SP 800 series, CNSSI 1253, and DoD 8500.
Ability to work independently within a schedule and with little direction.
Posting Details
Original Posting: June 26, 2025 Pay Range
Pay Range $126,100.00 - $227,950.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreements (if any), or other law.
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