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Linux L3 Systems Engineer - Infrastructure Security

https://www.citi.com/ Logo

Citi

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Location:
United States , New Castle

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Contract Type:
Not provided

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Salary:

96400.00 - 144600.00 USD / Year

Job Description:

This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.

Job Responsibility:

  • Provide Technical support for the Security Infrastructure and Applications Capacity, Performance and Stability reporting and support
  • Help innovate and bring process and technical enhancements
  • Lead initiative to develop/improve scripts and other programs for system monitoring and maintenance
  • Facilitate infrastructure projects and security assessment for the infrastructure with the associated applications in scope
  • Be responsible to assess the risk and associated impact of all operational issues and change events, while reacting quickly to escalate to technology management in a timely manner when required
  • Work closely with the development team to ensure the operational requirements are met during the project transition
  • Work across all levels of the organization with both technical and non-technical stakeholders
  • Proven ability to work with high priority global stakeholders within critical timelines
  • Deploy and design large scale complex security ecosystems

Requirements:

  • 3+ years' relevant data security experience as it relates to the responsibilities and qualifications
  • Proficiency in one or more of these scripting languages – Python, Unix Shell, Perl & PowerShell scripting
  • Strong proficiency with Linux and Windows
  • Hands-on experience working with various flavors of server operating systems
  • Experience with any NoSQL databases will also be considered
  • Must have experience with production server support, application upgrades and project life cycle and SDLC process
  • Deep understanding of TCP/IP technologies and internet routing protocols
  • Experience with RDBMS from application programmer’s perspective
  • Firm knowledge of how to interface with these databases, analyze & write complex queries & procedures
  • Experience with Data Protection Technologies like Physical or Virtual Hardware Security Modules, Public key Infrastructure (PKI), Encryption and Tokenization will be considered a plus
  • Consistently clear and concise written and verbal communication
  • Strong interpersonal and communication skills
  • Strong analytical skills and attention to detail
  • Bachelor’s degree/University degree or equivalent experience

Nice to have:

Relevant Certifications are a plus (e.g., Linux+, RHCSA, LFCS, LPIC, MCSE, etc.)

What we offer:
  • medical, dental & vision coverage
  • 401(k)
  • life, accident, and disability insurance
  • wellness programs
  • paid time off packages, including planned time off (vacation), unplanned time off (sick leave), and paid holidays

Additional Information:

Job Posted:
January 23, 2026

Expiration:
January 30, 2026

Employment Type:
Fulltime
Work Type:
Hybrid work
Job Link Share:

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