Security Engineer

Job Description

Leidos
Airports, Borders, and Security
is seeking a highly motivated
Cybers
ecurity Engineer to support
TSA on a
nationwide
program
.
The successful candidate will join a
n existing
team support
ing
cloud-based infrastructure and devices deployed throughout the US and US Territories
.
The team is highly integrated, and the successful candidate will be expected to learn the existing architecture and provide support both during normal hours, after hour patching, and on call as needed.
The individual will be expected to be able to work with minimal supervision and be self-directed in the areas of their
responsibility
.

In addition to responsibilities on program this
candidate will provide
their
specialized knowledge to help push forward Transportation Security Administration (TSA) Modernization efforts. This role serves as a bridge between Leidos' innovative solutions and TSA's specific mission to protect the nation's transportation systems and ensure freedom of movement for people and commerce. As part of the team, the Security Engineer will design and implement network monitoring and identity management solutions, conduct threat modeling, and ensure compliance with security standards. The ideal candidate brings experience with security accreditation, vulnerability assessment, and hands-on technical implementation.

Primary Responsibilities:

Administer and harden Cloud based environment.

Administer and harden servers and workstations (e.g., RHEL, Windows) including OS configuration, patching, and security baseline enforcement.

Administer and harden network appliances (
e.g.
VPN, SWG, NGFW) including configuration, patching, and security baseline enforcement.

Generate compliance and vulnerability reports for leadership, auditors, and governance
teams;
track remediation progress and aging.

Interpret technical vulnerabilities (CVEs, CVSS) and clearly communicate risk and remediation options to technical and non-technical stakeholders.

Design, implement and
maintain
secure system architectures
in accordance with
organizational policies and industry best practices.

Provide support for Active Directory and networking issues.

Provide user support and training, managing system access, permissions, and issue resolution.

Manage account creation, modification, and termination in compliance with security protocols.

Implement/configure IT equipment per DISA STIGs and resolve compliance issues

Run vulnerability
and compliance
scans and remediate findings

Design and implement network monitoring and maintenance solutions

Implement
centralized account management
for
TSS C
ommon Workstation (CW) users

Create threat models for
Leidos airport
offerings and
solutions

Docume
nt and deliver

any
documentation that may be
required
to obtain Authorization to Operate (ATO)
e.g., System Security Plan (SSP)
,
Security Assessment Report (SAR),
Contingency Plan
,
Network
Ports, Protocols, and Services Management (PPSM)

Resolve
, track, and
bring to closure
Plan of Actions & Milestones
(POA&M)

Basic Qualifications:

Must be a US Citizen

Must be able to
attain
a suitability determination from TSA

Demonstrated ability to work independently with minimal
supervision

Excellent problem-solving skills.

Proficiency
with common Agile practices, service-oriented environments, and better development
practices

Experience with networking ports and protocols, architecture of networked systems, functionality of various operating systems, cloud computing
environments
and common security tools.

Experience in working collaboratively within a remote environment.

Strong consulting, leading, and mentoring skills along with the ability to effectively communicate and collaborate with stakeholders at all levels.

Broad knowledge of and experience with a wide variety of application technologies, platforms, and tools including security and infrastructure configuration and monitoring.

Excellent written, verbal, and presentation communication skills.

Demonstrated experience applying efficient task management and ability to adjust to changing requirements

Excellent analytical and technical skills.

Bachelor's Degree in
Computer Science
, Engineering, or a similar
field
or 10+ years relevant experience and associated certifications

CISSP or Security + certification

Experience working with government agency to obtain ATO
for
new IT service
s

Ex
perience
enforcing DISA STIG
security policies in Windows and Linux environments

Familiarity with NIST Risk Management Framework (RMF)

Familiarity with DISA STIGs and vulnerability scanning tools (e.g., Nessus
, Nipper
)

Preferred Qualifications:

Experience
implementing Endpoint Management Solutions
(
e.g.,
Trellix
Endpoint
Security
,
ePolicy
Orchestrator
)

Experience with network monitoring solutions
(e.g., PRTG
)

Experience with centralized Security Information and Event Management (SIEM) solutions
(e.g., Spl
unk)

Experience accrediting systems and obtaining ATO from TSA

Familiarity with threat modeling tools (e.g., OWASP Threat Dragon
,
Microsoft Threat Modeling Tool
)

AWS Certification

Familiarity with Red Hat Open Shift

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:
February 26, 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.