Sr. ISSE with TS/SCI Polygraph
Company: Leidos
Location: Annapolis Junction
Posted on: April 2, 2026
|
|
|
Job Description:
Leidos has a new and exciting opportunity for a Sr. Information
System Security Engineer in our Intel Sector's Cyber & Analytics
Business Area (CABA) . Our talented team is at the forefront in
Security Engineering, Computer Network Operations (CNO), Mission
Software, Analytical Methods and Modeling, Signals Intelligence
(SIGINT), and Cryptographic Key Management. At Leidos , we offer
competitive benefits , including Paid Time Off, 11 paid Holidays,
401K with a 6% company match and immediate vesting, Flexible
Schedules, Discounted Stock Purchase Plans, Technical Upskilling,
Education and Training Support, Parental Paid Leave, and much more.
Join us and make a difference in National Security! *You must have
an active TS/SCI Polygraph up front. Unfortunately, no exceptions.*
Leidos has an exciting opportunity for a Sr. Information System
Security Engineer to join a high performing agile team using the
Scaled Agile Framework (SAFe) methodology to support a fast-paced,
complex program! Program execution follows DEVOPS best practices
and employs robust development, test and production environments.
Our team of security engineers support enhancements to system
security architecture and cyber security capabilities; manage
multiple system security plans for development, test and production
systems following the Risk Management Framework (RMF); manage cross
domain capabilities; and support Security Verification Testing
(SVT) of relevant Type 1 devices. The contract provides system
engineering, development, test, integration and operational
support, and is focused on injecting new technology and adding
advanced capabilities while continuing to support an on-going
operational system. You will provide support for adding new
capabilities to a complex system with exacting interface,
performance and security requirements. You will become part of a
team of Security Engineers working on providing improvements to our
operational, test, integration, and development systems and solving
challenging issues on a large, significant program. The position
requires a solid understanding of security practices and policies
as well as hands-on vulnerability testing experience. You will have
numerous responsibilities from day to day drawn from a wide array
of activities. The strongest candidates will have experience
working in these areas: Validating and verifying system security
requirements and establishing system security designs for
large-scale systems, major system elements, and interfacing systems
that are part of a large complex network environment with
geographically distributed components. Identifying and implementing
appropriate information security architectures and functionality to
ensure uniform application of security policy and enterprise
solutions. Recommending and developing technical solutions,
products, and standards based on current and desired system
security architecture. Assessing and mitigating system security
threats and risks throughout the program life cycle. Leading and/or
contributing to the security planning, assessment, risk analysis,
risk management, certification and awareness activities for various
system and networking operations. Effectively collaborating with
other internal technical experts on a day-to-day basis.
Communicating with Program Managers and POCs from customer
organizations when necessary, regarding Security issues of
significant importance. Participating in Program Increment Planning
and related agile team activities. Working closely with System
Engineering, Test Engineering, and Integration teams to ensure that
the hardware and software architecture and implementation meets
security requirements. Analyzing and assessing system
implementation against multiple security compliance policies and
recommending and implementing enhancements. Evaluating security
solutions to ensure they meet customer specified requirements for
processing information. Evaluating the impact of new development on
the operational security posture of the system. Evaluating,
reviewing, and testing critical software. Proposing, assessing,
coordinating, implementing, and enforcing information systems
security policies, standards, and methodologies. Auditing and
assessing system security configuration settings using common
methodologies and tools. Managing and enforcing security strategies
and policies that effect various components of geographically
distributed systems. Providing configuration management for
security-relevant information system software. Serving as a subject
matter expert in security architecture to include providing advice
to Program Managers, Customer technical experts, and internal
program teams. Formulating security compliance requirements for new
system features. Identifying and remediating security issues
throughout the system. Supporting risk assessment, risk management,
security control assessment, continuous monitoring, service design,
and other IA program support functions. Working with development
teams to enrich team-wide understanding of different types of
vulnerabilities, attack vectors and remediation approaches.
Planning and conducting security verification testing of relevant
type 1 devices. Basic Qualifications Bachelor’s degree in Computer
Science, Information Assurance, Information Security System
Engineering, or a related discipline and at least 12 years of
relevant experience. Additional experience may be substituted for a
degree. Must have a solid understanding of security practices and
policies and hands-on vulnerability testing experience using
Customer tools. Must have experience applying Risk Management
Framework. Must have experience formulating and assessing IT
security policy. Must have demonstrated knowledge of and experience
with common security tools, such as Nessus, NMAP and Wireshark
hardware/software security implementation, communication protocol,
encryption techniques/tools, and web services. Must have experience
with secure configurations of commonly used desktop and server
operating systems. Must be comfortable working on multiple systems
and components simultaneously in various configurations. Must have
strong verbal and written communications skills. Must be committed
to adopting and adhering to best practices. Must be able to
effectively plan and prioritize tasking and communicate clearly
regarding technical options and trade-offs. Must be capable of
performing high quality work both independently and with a team in
a fast-moving environment. Preferred Qualifications Five (5) years
of experience with Defense in Depth Principals/technology
(including access control, authorization, identification and
authentication, public key infrastructure, network and enterprise
security architecture) and applying risk assessment methodology to
system development. DoD 8570 compliance with IASAE Level 2 or 3.
Information Systems Security Engineering Professional (ISSEP)
Certification. Computer Information Systems Security Professional
(CISSP) Certification. Experience developing/implementing
integrated security services management processes, such as
assessing and auditing network penetration testing, anti-virus
planning assistance, risk analysis, and incident response.
Experience providing information assurance support for application
development that includes system security certifications and
project evaluations for firewalls that encompass the development,
design, and implementation. Experience with penetration testing
tools. Experience with scripting languages.
careers.leidos.com/CONMD CSSKEY CONMD abundance If you're looking
for comfort, keep scrolling. At Leidos, we outthink, outbuild, and
outpace the status quo — because the mission demands it. We're not
hiring followers. We're recruiting the ones who disrupt, provoke,
and refuse to fail. Step 10 is ancient history. We're already at
step 30 — and moving faster than anyone else dares. Original
Posting: March 12, 2026 For 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 $131,300.00 -
$237,350.00 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 (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.
Keywords: Leidos, Olney , Sr. ISSE with TS/SCI Polygraph, IT / Software / Systems , Annapolis Junction, Maryland
