Linux L3 Systems Engineer - Infrastructure Security, Citi

Citi

Location:
United States, New Castle

Category:
IT - Administration

Contract Type:
Employment contract

Salary:

125760.00 - 188640.00 USD / Year

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Job Description:

Linux L3 Systems Engineer - Infrastructure Security position at Citi, providing technical support for security infrastructure and applications, leading initiatives for system monitoring and maintenance, facilitating infrastructure projects and security assessments, and working with global stakeholders to deploy complex security ecosystems.

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
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:

5+ years' relevant data security experience
Proficiency in one or more 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
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 databases, analyze & write complex queries & procedures
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:

Experience with Data Protection Technologies like Physical or Virtual Hardware Security Modules, Public key Infrastructure (PKI), Encryption and Tokenization
Relevant Certifications (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 vacation, sick leave, and paid holidays
Discretionary and formulaic incentive and retention awards

Additional Information:

Job Posted:
November 07, 2025

Expiration:
November 13, 2025

Employment Type:

Fulltime

Work Type:

Hybrid work

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Linux L3 Systems Engineer - Infrastructure Security