Citi · 10 hours ago
Linux L3 Systems Engineer - Infrastructure Security, AVP
New Castle Delaware United States
Full-time
Hybrid
Mid Level
$96K/yr - $145K/yr
3+ years expCiti, the leading global bank, is seeking a Linux L3 Systems Engineer specializing in Infrastructure Security. The role involves providing technical support for security infrastructure, leading initiatives for process enhancements, and collaborating with development teams to meet operational requirements.
BankingFinanceFinancial Services
Responsibilities
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
Qualification
Required
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
Preferred
Relevant Certifications are a plus (e.g., Linux+, RHCSA, LFCS, LPIC, MCSE, etc.)
Benefits
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
Company
Citi
Citi's mission is to serve as a trusted partner to our clients by responsibly providing financial services that enable growth and economic progress.
10001+ employees
H1B Sponsorship
Citi has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (1386)
2024 (849)
2023 (1375)
2022 (1117)
2021 (876)
2020 (901)
Funding
Current Stage
Late StageLeadership Team
James Monahan
Managing Director / Global Head of Asset Servicing
Naveed Sultan
Managing Director, Chairman, Institutional Clients Group
Recent News
2026-01-20
2026-01-15
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