Description
The Multi-Domain Solutions Division at Leidos currently has an opening for a Secret cleared Information Systems Security Engineer (ISSE) to work in our Orlando, Florida office. Ability to work in Central Florida is preferred.
Primary Responsibilities
The ISSE will be responsible for monitoring TEMPEST certifications and the development of an RMF Assess and Authorize (A&A) package, including detailing controls, a system scanning plan, POA&M maintenance, and a Body of Evidence validating control implementation. High Level tasking for this team will include the following:
Build and support a culture grounded in the Leidos values, beliefs and expectations and highest standards of ethical and respectful behavior
Plan and detail the security of a complex mission-critical defense network per the DoD RMF
Plan, document, and achieve system Interim Authorization to Test (IATT), Interim Authorization to Operate (IATO), Authorization to Operate (ATO), Authorization to Connect (ATC), Interconnection Security Agreement (ISA) and other approvals as required by the Government Authorizing Official
Perform and/or review security assessments of computing environments to identify points of vulnerability, non- compliance with established Cybersecurity standards and regulations and recommend mitigation strategies.
Validate and verify system security requirements definitions and analysis.
Assist architects and systems developers in the identification and implementation of appropriate information security functionality to ensure uniform application of security policy and solutions.
Assess and develop mitigations for system security threats/risks throughout the program life cycle.
Contribute to the security planning, assessment, risk analysis, risk management, certification and awareness activities for system and networking operations.
Basic Qualifications
Must possess a minimum of a Secret clearance with the ability to obtain and maintain a TS/SCI clearance.
A Bachelors Degree and 8-12 years of relative experience.
Achievement of any DoD 8140 or DoD 8570 baseline certification within 6 months of start of work .
Experience with the NIST Risk Management Framework
Experience with NIST SP 800-53 control development and documentation
Ability to achieve a high degree of customer satisfaction and maintain Leidos positive brand recognition
Ability to work with a distributed team
Preferred Qualifications
Experience working with DoD security Assessment and Authorization
Experience with eMASS
Experience with Jira
Experience with Confluence
Experience developing and maintaining authorization Body of Evidence
Experience with Tenable Nessus
Experience with Security Onion SIEM solution
Understanding of TEMPEST requirements and assessments
At Leidos, we don’t want someone who "fits the mold"—we want someone who melts it down and builds something better. This is a role for the restless, the over-caffeinated, the ones who ask, “what’s next?” before the dust settles on “what’s now.”
If you’re already scheming step 20 while everyone else is still debating step 2… good. You’ll fit right in.
Original Posting: October 24, 2025For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
Pay Range: Pay Range $104,650.00 - $189,175.00The 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 (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.
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