Principal Endpoint Security Systems Engineer

Association of Old Crows; Bethesda (MD); Hybrid; USD 131,000 - 237,000; Full time

Benefits offered by this job

Paid Time Off

11 paid Holidays

401K with company match

Flexible Schedules

Discounted Stock Purchase Plans

Technical Upskilling

Education and Training Support

Parental Paid Leave

Job summary

Leidos is seeking a Principal Endpoint Security Systems Engineer to design, deploy, and maintain endpoint security across a hybrid cloud/on‑prem mission environment.

You will integrate Linux and Windows mission servers with the Trellix management console, tune scan policies, and work with mission teams to resolve issues.

Candidates must hold TS/SCI with polygraph clearance, with hands‑on experience in Trellix tools, incident response, forensics, and cross‑team collaboration.

Qualifications

• Active TS/SCI with polygraph clearance is required.
• Bachelor’s degree with at least 12 years of relevant experience (additional years may substitute).
• Experience with Trellix tools and incident response/forensics.

Responsibilities

• Maintain and upgrade central management consoles across isolated networks (Tre_lix ePolicy Orchestrator).
• Integrate Linux/Windows mission servers with the management console.
• Deploy Trellix Endpoint Threat Protection updates and optimize scan exclusion policies.
• Troubleshoot integration issues with mission teams and improve performance in hybrid environments.
• Automate endpoint security processes and enable integrated reporting (e.g., Splunk, AppDynamics).
• Investigate malware findings on mission servers.

Skills

Trellix ePolicy Orchestrator

Trellix Endpoint Threat Protection

Linux

Windows

Incident detection

Incident response

Forensics

Education

Bachelor’s degree + 12+ yrs

Tools

Splunk

AppDynamics

Trellix ePolicy Orchestrator

Trellix Endpoint Threat Protection

Cisco Secure Endpoint

Job description

Description

Leidos has an exciting opportunity for a Principal 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

Join us and make a difference in National Security!

Job Summary

This effort is seeking an experienced endpoint security systems engineer to join our Cyber Security Engineering team. The focus of this team member will be to design, deploy, maintain, and upgrade endpoint security capabilities, with opportunities for cross training on our other security tools. Working in a hybrid cloud/on-prem mission environment the engineer will support integration of Linux and Windows hosted mission systems with the endpoint security product and maintaining the scan policies to ensure proper protection of mission systems from external threats.

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 at least 12 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 $131,300.00 - $237,350.00

Please refer to the company's website or job descriptions to learn more about them.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

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 at www.leidos.com/careers/pay-benefits.

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [e-mail].

Commitment to Non-Discrimination

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.