Primary Responsibilities
Plan, implement, manage, monitor, and upgrade security controls and tools used to protect enterprise systems and networks, while identifying opportunities to automate repeatable operations tasks.
Design, configure, implement, troubleshoot, and maintain security technologies such as firewalls (security groups), endpoint protection tools (HBSS/Trellix), SIEM platforms (Splunk),
Formulate systems and methodologies as well as respond to security related events and assist in remediation efforts of cyber security incidents (system and/or network breaches, malware attacks)
Participate in change management processes to ensure system changes maintain security compliance and do not introduce new vulnerabilities.
Conduct routine vulnerability scanning and assessment activities, provide formal and informal reports to technical teams, and track remediation efforts to closure.
Provide technical leadership and subject matter expertise to the security engineering team while coordinating with peer Technical Leads across infrastructure and application domains to ensure alignment of architecture and security controls.
Serve as the primary technical escalation point for complex or cross-domain security issues while mentoring junior engineers through collaborative troubleshooting and hands-on technical guidance.
Basic Qualifications
Experience implementing and managing Security Information and Event Management (SIEM) tools such as Splunk or similar platforms.
Experience working with endpoint and network security technologies, including IDS/IPS, HBSS/Trellix, and related defensive security tools.
Expert with automation (e.g., Ansible, CloudFormation)
Demonstrated history of personally implementing, troubleshooting, and maintaining security technologies in production environments.
Proven ability to balance technical leadership responsibilities with significant hands-on engineering work. Strong attention to detail with analytical mind outstanding problem-solving skills
Monitor security advisories, bulletins, and industry threat intelligence to stay informed of current vulnerabilities, threats, and trends.
Requires Master’s degree and 15 or more years of prior relevant experience. Additional years of experience may be substituted in lieu of a degree. To be considered, you must have an active TS/SCI with polygraph security clearance
Preferred Qualifications
Experience with additional security tools and processes such as IDS/IPS, VPN, GitHub, GitLab, SonarQube
Experience with implementing and managing network and application firewalls, virtual private networks, firewalls, web protocols, incident detection, incident response, and forensics activities,
Experience with Agile software development processes/environments, scripting /programming languages such as Python or PowerShell. (e.g., React), DevOpsSec pipelines and tools
Familiar with Cloud Computing Technologies and Services (AWS, Oracle, Google)
Knowledge of potential attack vectors such as XSS, injection, hijacking and social engineering
Experience with health monitoring tools (SolarWinds) and using STIG viewers/tools to assess compliance with standards
Experience with database systems, search engines, web applications, Linux Red Hat environments, Windows environment
At Leidos, the opportunities are boundless. We challenge our staff with interesting assignments that allow them to thrive professionally and personally. For us, helping you grow your career is good business. We look forward to learning more about you – apply today.
CABARESTON
#ASBA
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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 23, 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 $154,050.00 - $278,475.00
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.
