Sr. Endpoint Security Systems Engineer

Leidos LLC; Plyers Mill Estates (MD); On-site; USD 108,000 - 195,000; Full time

Benefits offered by this job

Paid Time Off

11 paid Holidays

401K with 6% match

Flexible Schedules

Discounted Stock Purchase Plans

Technical Upskilling

Education and Training Support

Parental Paid Leave

Health and Wellness programs

Income Protection

Paid Leave

Retirement

Job summary

Leidos is seeking a Sr. Endpoint Security Systems Engineer to support the Intel Security Sector's Analysis Solutions Business Area. You will manage central security consoles, integrate mission servers, and optimize endpoint security across hybrid environments.

The role requires experience with Trellix tools, Linux/Windows administration, and a TS/SCI with polygraph clearance. Join a team that protects national security through advanced cyber defense capabilities.

Qualifications

• Bachelor’s degree with 8+ years relevant experience. Additional years of experience may be substituted in lieu of a degree.
• Experience with Trellix ePolicy Orchestrator and Trellix Endpoint Threat Protection.
• Experience with maintaining systems on Linux and Windows platforms.
• Ability to partner with mission application teams to troubleshoot endpoint security integration.
• Experience with incident detection, incident response and forensics activities.
• Strong attention to detail with analytical mind and outstanding problem-solving skills.
• Active TS/SCI with polygraph security clearance.

Responsibilities

• Maintaining and upgrading the central management consoles on multiple isolated networks.
• Managing the integration of mission application servers with the management console.
• Deploying malware protection updates and improved scan exclusion policies to mission servers.
• Responding promptly to mission teams to troubleshoot issues with integration.
• Determine methods to automate and improve the performance of the endpoint security suite in hybrid environments.
• Integrate endpoint security scan processes for reporting via external tools like Splunk or AppDynamics.
• Investigate malware findings on mission application servers.

Skills

Analytical mindset

Detail-oriented

Problem-solving

Team collaboration

Education

Bachelor's degree

Tools

Trellix ePolicy Orchestrator

Trellix Endpoint Threat Protection

Splunk

AppDynamics

Cisco Secure Endpoint

AWS

Job description

Job Summary

Leidos has an exciting opportunity for a Sr. Endpoint Security Systems Engineer in our Intel Security Sector's Analysis Solutions Business Area. 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!

Benefits

• 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
• Health and Wellness programs
• Income Protection
• Paid Leave
• Retirement

Primary Responsibilities

• Maintaining and upgrading the central management consoles (currently Trellix - ePolicy Orchestrator) on multiple isolated networks
• Managing the integration of mission application servers (Linux and Windows) with the management console
• Deploying malware protection software (currently Trellix Endpoint Threat Protection) updates and improved scan exclusion policies to mission application servers
• Responding promptly to mission teams to successfully troubleshoot issues with integration (including cases where excessive real time malware scans are believed to be impeding mission performance)
• Determine methods to automate and improve the performance of the endpoint security suite within a hybrid cloud/on-prem environment
• Integrate endpoint security scan processes for integrated reporting via external tools (such as Splunk or AppDynamics)
• Investigate findings of malware detected on mission application servers

Basic Qualifications

• Experience with tools such as Trellix ePolicy Orchestrator and Trellix Endpoint Threat Protection
• Experience with maintaining systems on Linux and Windows platforms
• Ability to partner with mission application teams to jointly troubleshoot issues with endpoint security integration
• Experience with incident detection, incident response and forensics activities
• Strong attention to detail with analytical mind and outstanding problem-solving skills
• Bachelor’s degree with 8 or more years relevant experience. Additional years of experience may be substituted in lieu of a degree.
• To be considered must have an active TS/SCI with polygraph security clearance

Preferred Qualifications

• Experience with Cisco Secure Endpoint (formerly AMP for Endpoints) or other endpoint security tools
• Experience with Cloud Computing Technologies/Amazon Web Services (AWS)
• Experience integrating endpoint security tool findings with external products such as Splunk or AppDynamics
• Experience with managing endpoint security across on-prem and cloud environment boundaries
• Experience with additional cyber security tools and processes such as Splunk, Rapid7, SolarWinds, Cisco IDS/IPS, VPN, WebInspect, AppDetective

Pay Range

Pay Range $107,900.00 - $195,050.00. 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.

Original Posting

August 25, 2026

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 Leidos.com 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 [e-mail].

Commitment and 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.