Linux L3 Systems Engineer - Infrastructure Security, AVP

Discover your future at Citi

Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview

About Citi:

Citi, the leading global bank, has approximately 200 million customer accounts and does business in more than 160 countries and jurisdictions. Citi provides consumers, corporations, governments, and institutions with a broad range of financial products and services, including consumer banking and credit, corporate and investment banking, securities brokerage, transaction services, and wealth management.

As a bank with a brain and a soul, Citi creates economic value that is systemically responsible and in our clients’ best interests. As a financial institution that touches every region of the world and every sector that shapes your daily life, our Operations & Technology teams are charged with a mission that rivals any large tech company. Our technology solutions are the foundations of everything we do from keeping the bank safe, managing global resources, and providing the technical tools our workers need to be successful to designing our digital architecture and ensuring our platforms provide a first-class customer experience. We reimagine client and partner experiences to deliver excellence through secure, reliable, and efficient services.

Our commitment to diversity includes a workforce that represents the clients we serve from all walks of life, backgrounds, and origins. We foster an environment where the best people want to work. We value and demand respect for others, promote individuals based on merit, and ensure opportunities for personal development are widely available to all. Ideal candidates are innovators with well-rounded backgrounds who bring their authentic selves to work and complement our culture of delivering results with pride. If you are a problem solver who seeks passion in your work, come join us. We’ll enable growth and progress together.

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

Qualifications

• 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

Education

• Bachelor’s degree/University degree or equivalent experience
• Relevant Certifications are a plus (e.g., Linux+, RHCSA, LFCS, LPIC, MCSE, etc.)

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

------------------------------------------------------

Job Family Group: Technology

------------------------------------------------------

Job Family:Information Security

------------------------------------------------------

Time Type:Full time

------------------------------------------------------

Primary Location:New Castle Delaware United States

------------------------------------------------------

Primary Location Full Time Salary Range:$96,400.00 - $144,600.00

In addition to salary, Citi’s offerings may also include, for eligible employees, discretionary and formulaic incentive and retention awards. Citi offers competitive employee benefits, including: medical, dental & vision coverage; 401(k); life, accident, and disability insurance; and wellness programs. Citi also offers paid time off packages, including planned time off (vacation), unplanned time off (sick leave), and paid holidays. For additional information regarding Citi employee benefits, please visit citibenefits.com. Available offerings may vary by jurisdiction, job level, and date of hire.

------------------------------------------------------

Most Relevant Skills Please see the requirements listed above.

------------------------------------------------------

Other Relevant Skills For complementary skills, please see above and/or contact the recruiter.

------------------------------------------------------

Anticipated Posting Close Date:May 06, 2026

------------------------------------------------------

Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi.
View Citi’s EEO Policy Statement and the Know Your Rights poster.