Senior Engineer – Cybersecurity Application Security at OneMain Financial

OneMain Financial; Irving (TX); On-site; USD 140,000 - 190,000; Full time

Job summary

OneMain Financial in Irving, TX is seeking a Senior Engineer – Cybersecurity Application Security to lead the design and implementation of secure software development practices on site. You will build and maintain security tooling, integrate tests into CI/CD, and drive secure-by-design across engineering teams.

The role requires 5+ years of experience in application security, deep knowledge of API and software supply chain security, and the ability to translate complex risks into actionable

Qualifications

• Bachelor's degree in cybersecurity, CS, IT, engineering or related field.
• 5+ years of application security engineering experience.
• Experience implementing and administering application security platforms (SAST, DAST, SCA, IAST, container security, API security testing, software supply chain security).
• Experience securing APIs across the development lifecycle including API discovery, authentication/authorization, schema testing, OWASP API Security Top 10, remediation guidance.
• Experience integrating security tooling and automated security controls into CI/CD pipelines using infrastructure-as-code (IAC).
• Experience supporting secure SDLC governance, policy enforcement, compliance reporting, and remediation management.
• Strong written and verbal communication skills.
• Ability to independently manage moderately complex security initiatives.

Responsibilities

• Implement, administer, and improve application security tooling for secure software development.
• Integrate security testing and security controls into software delivery pipelines and engineering workflows.
• Develop, maintain, and enhance application security standards, policies, procedures, documentation, and operational guidance.
• Analyze security findings, metrics, and compliance trends to identify improvements and elevated risk areas.
• Partner with engineering teams to improve security adoption and enable secure-by-design development practices.
• Support secure SDLC governance, vulnerability management, and remediation tracking activities.
• Collaborate with cybersecurity, architecture, platform, and engineering stakeholders to improve security maturity.
• Contribute to security automation initiatives that increase operational efficiency.
• Support secure implementation of emerging software development practices, including AI-assisted workflows.

Skills

Communication skills

Security governance

Stakeholder influence

Secure-by-design

CI/CD security

Education

Bachelor's degree in Cybersecurity / CS / IT / Engineering

Tools

SAST

DAST

SCA

IAST

Container security

API security testing

Software supply chain security

CI/CD IaC tooling

Job description

Senior Engineer – Cybersecurity Application Security

OneMain Financial – Irving, TX, US.

Full time on site position offers great opportunities for career growth.

Key Responsibilities

• Implement, administer, and continuously improve application security tooling supporting secure software development.
• Integrate security testing and security controls into software delivery pipelines and engineering workflows.
• Develop, maintain, and enhance application security standards, policies, procedures, documentation, and operational guidance.
• Analyze security findings, operational metrics, and compliance trends to identify improvement opportunities and areas of elevated risk.
• Partner with engineering teams to improve security adoption and enable secure-by-design and secure-by-default development practices.
• Support secure SDLC governance, vulnerability management, and remediation tracking activities.
• Collaborate with cybersecurity, architecture, platform, and engineering stakeholders to improve overall application security maturity.
• Contribute to security automation initiatives that increase operational efficiency and reduce manual effort.
• Support the secure implementation of emerging software development practices, including AI-assisted development workflows.

Required Qualifications

• Bachelor's degree in Cybersecurity, Computer Science, Information Technology, Engineering, or a related field.
• 5+ years of application security engineering experience.
• Experience implementing and administering application security platforms, including SAST, DAST, SCA, IAST, container security, API security testing, and software supply chain security capabilities.
• Experience securing APIs across the development lifecycle, including API discovery, authentication and authorization validation, schema and contract testing, abuse-case analysis, OWASP API Security Top 10 risks, and remediation guidance.
• Experience integrating security tooling and automated security controls into CI/CD pipelines using infrastructure-as-code (IAC).
• Experience supporting secure SDLC governance, policy enforcement, compliance reporting, and remediation management.
• Working knowledge of application security principles, secure coding practices, OWASP Top 10 risks, and common vulnerability remediation techniques.
• Experience developing and maintaining technical standards, procedures, policies, and security documentation.
• Strong written and verbal communication skills with the ability to influence technical stakeholders.
• Ability to independently manage moderately complex security initiatives and contribute to broader cybersecurity objectives.

Preferred Qualifications

• Industry certifications such as CSSLP, GSEC, CISSP, GWAPT, or similar.
• Experience supporting financial services, banking, or other highly regulated environments.
• Experience assessing, implementing, and governing security controls for AI-assisted software development workflows, including secure use of code-generation tools, prompt and output handling, developer guardrails, and risk monitoring.
• Experience with security automation, scripting, and workflow orchestration.
• Experience creating executive, engineering, or operational security metrics and dashboards.

OneMain Holdings, Inc. is an Equal Employment Opportunity (EEO) employer. Qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship status, color, creed, culture, disability, ethnicity, gender, gender identity or expression, genetic information or history, marital status, military status, national origin, nationality, pregnancy, race, religion, sex, sexual orientation, socioeconomic status, transgender or on any other basis protected by law.