Internship Offensive Security Engineer Jobs in Texas

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 Enterprise 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.

About the Chief Information Security Office (CISO): The Chief Information Security Office (CISO) is home to deeply talented colleagues that work to ensure the safety of Citi’s clients, our revenue, our employees and our proprietary data. We manage information security as one end‑to‑end program – one with a clear mandate and accountability. Our mission is a program that is fully anchored to modern control and architectural frameworks, is fully aligned with the enterprise architecture of the firm and is deeply integrated into the sectors and functions.

The AI & Offensive Security Analyst is a hands‑on practitioner role within Citi’s Advanced Pentesting & Research team. This position is responsible for driving offensive security research, vulnerability discovery, and the development of AI‑powered security tooling and automation. The ideal candidate combines deep adversarial security expertise with hands‑on AI engineering capability — someone who can identify and exploit weaknesses in complex systems, then build intelligent solutions to defend against them at scale.

mindset

The successful candidate will bring a strong R&D, with a natural curiosity and discipline to stay at the forefront of the security and AI research landscape — actively identifying new research opportunities.

You will work closely with engineering, architecture, and risk teams to embed security intelligence across the firm’s technology landscape.

• Perform deep vulnerability research on emerging attack surfaces including LLM‑based systems, AI pipelines, model inference endpoints, and prompt injection vectors.
• Design, build, and maintain AI harnesses capable of performing security‑related tasks, including autonomous vulnerability scanning agents, AI‑driven exploit classification systems, intelligent threat detection models, and LLM‑assisted code analysis engines.
• Research and prototype novel attack techniques and defensive countermeasures, and contribute findings to internal knowledge bases, threat models, and security engineering standards.
• Analyze source code using both manual review and AI‑augmented static analysis to identify and mitigate security weaknesses, logic flaws, and injection vulnerabilities across polyglot codebases.
• Conduct offensive security assessments and penetration testing against applications, infrastructure, and AI/ML systems to identify exploitable vulnerabilities before adversaries do.
• Identify opportunities to automate and standardize information security controls using AI‑driven pipelines, reducing manual effort and improving detection fidelity across supported groups.

• 6+ years of experience in Cyber Security or related field.
• Master’s degree in computer science, Cyber Security or related field with a minimum of 3 years of experience in a penetration testing or application development role.
• Bachelor’s degree in computer science, Cyber Security or related field with a minimum of 5 years of experience in a penetration testing or application development role.
• Hands‑on experience with security & software engineering tooling: Burp Suite, SAST/DAST scanners, Claude Code, GH Copilot & custom exploit development from CVE advisories.
• Demonstrated proficiency in penetration testing across web, network, and binary domains.
• Strong R&D mindset — demonstrated ability to independently identify new research opportunities, follow emerging academic and industry security research, and translate findings into actionable tooling or defensive improvements.
• Good proficiency in reading, understanding, and working with code and its features — including the ability to navigate unfamiliar codebases, reason about code behaviour, identify logic flaws, and leverage language‑specific constructs in security analysis and tool development.

• Bachelor’s degree/University degree or equivalent experience.

Irving, Texas, United States

$125,760.00 – $188,640.00

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.

jun 30, 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.