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Job #: R-00054686
Location: San Antonio, TX
Category: Security Architecture and Engineering
Schedule (FT/PT): Full Time
Travel Required: Yes, 10% of the time
Shift: Day
Potential for Telework: Yes, 10%
Clearance: Top Secret/SCI
Referral Eligibility: Eligible
Group: Defense

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Job Description:

The Defense Group at Leidos is currently seeking a Senior Systems Engineer to work out of San Antonio, TX.

Looking for a Cybersecurity Senior System Engineer with a strong background in designing, deploying, and maintaining cybersecurity solutions. The Engineer is part of a technical team that focuses on leveraging commercial and government solutions to determine the best combination/configuration of capabilities to match operational requirements of each unique environment. The Engineer is also part of an on-site team in San Antonio which focuses on unique environments for our clients.
The Cybersecurity Senior System Engineer plans, designs and implements tailored cybersecurity solutions for unique environments represented by a combination of local and wide-area infrastructure and/or network systems which feature a wide variety of platforms and protocols.
You will also support deployed solutions by monitoring, troubleshooting, or updating a variety of hardware, software, or network issues when required.

•Work with a technical team to design tailored cybersecurity capabilities that meet client requirements
•Facilitate deployment logistics and ultimately build, configure, and deploy capabilities
•Monitor and troubleshoot system, data, and network issues
•Upgrade systems as required
•Routinely interact with clients and internal teams
•Collaborate through reliable communication and documentation
•Provide on call support outside of business hours as needed

•Require BS degree and 8 – 12 years of prior relevant experience in order to operate within the scope contemplated by the level. Experience in lieu of degree may be accepted.

•8 or more years of experience with Linux

•Active DoD TS/SCI clearance
•Ability to maintain active DoD TS/SCI clearance
•5 or more years of experience supporting a DoD Cybersecurity environment
•5 or more years of experience deploying systems and performing system administration on DoD networks
•5 years of experience with security architecture analysis, design and implementation
•3 years of experience with Security Information and Event Management (SIEM) systems
•3 years experience with Network technologies, protocols, databases and classified network/s
•DoD 8570 IAT Level II and CSSP Infrastructure Support Certifications such as: CCNE, CCNA Security, GICSP, GSEC, Security+ CE, SSCP, CEH

•Team player with the ability to work independently while maintaining good communication in fast-paced and complex mission environments
•Senior engineer willing to learn internal capabilities and support preferred configurations
•Extensive experience with DoD and classified networks
•Experience with cyber/systems security for non-traditional non-IP environments
•Experience with DoD mission and mission support system engineering/design efforts
•Experience with data aggregation technologies such as Elastic Stack and/or Greenplum
•Experience with SIEM technologies such as Kibana, Splunk, ArcSight, McAfee
•Experience with DoD 8530 Requirements
•Experience and/or understanding of DoD Standard Technical Implementation Guides
•Experience and/or understanding of DoD 8500 Series
•Strong analytical, problem-solving and decision-making skills  

External Referral Bonus:


Potential for Telework:

Yes, 10%

Clearance Level Required:

Top Secret/SCI


Yes, 10% of the time

Scheduled Weekly Hours:




Requisition Category:


Job Family:

Security Architecture and Engineering

Pay Range:

About Leidos

Leidos is a Fortune 500® information technology, engineering, and science solutions and services leader working to solve the world’s toughest challenges in the defense, intelligence, homeland security, civil, and health markets. The company’s 39,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Virginia, Leidos reported annual revenues of approximately $12.30 billion for the fiscal year ended January 1, 2021. For more information, visit

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [email protected].

Commitment to Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

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