Mainframe and Web Application Security Senior Engineer - Senior Penetration Tester

Truist; Greensboro (NC); On-site; USD 140,000 - 180,000; Full time

Benefits offered by this job

Medical benefits

Dental benefits

Vision benefits

Life Insurance

Disability Insurance

401k plan

Paid vacation

Paid holidays

Job summary

Truist is seeking a senior penetration tester to perform advanced security assessments across enterprise technologies with a focus on mainframe environments such as z/OS. You will identify vulnerabilities, validate findings, and work with technology teams to reduce risk.

Telecommuting may be considered for well-qualified candidates; typical hours align with EST. The role requires strong technical writing and the ability to defend findings to technical and non-technical audiences.

Qualifications

• Bachelor’s degree or equivalent education, training, and work-related experience.
• Minimum of 7 years of experience in security engineering or related cybersecurity roles.
• Deep specialized knowledge in cybersecurity principles, theories, and concepts.
• Proven experience in software development lifecycle security practices.
• Deep knowledge of threat modeling, security testing, and penetration testing.
• Experience implementing and managing complex information security technologies.

Responsibilities

• Conducts black box, grey box and assumed breach penetration tests of enterprise z/OS environments.
• Uses manual techniques, scripting (REXX, JCL, Assembler, Python) and offensive tooling to enumerate users and resources.
• Documents findings with clear reproduction steps, supporting evidence, impact statements, and remediation recommendations.
• Presents and defends technical findings to application teams, mainframe engineers, and risk partners.
• Performs validation and retesting to confirm remediation and risk reduction, and supports audit/compliance.
• Partners with testing teams to improve mainframe testing coverage, playbooks, tooling, automation.
• Performs peer reviews and provides technical guidance to security professionals.
• Maintains knowledge of mainframe attack techniques and security threats.

Skills

Security engineering

Threat modeling

Penetration testing

Security architecture

Education

Bachelor's degree or equivalent

Tools

REXX

JCL

Assembler

Python

Job description

Need Help?

If you have a disability and need assistance with the application, you can request a reasonable accommodation. Send an email to Accessibility (accommodation requests only; other inquiries won't receive a response).

Regular or Temporary:

Regular

Language Fluency: English (Required)

Work Shift: 1st shift (United States of America)

Please review the following job description:

Performs advanced penetration testing and security assessments across enterprise technologies, with a primary focus on mainframe environments. Identifies and validates vulnerabilities, evaluates attack paths and control weaknesses, documents clear and defensible findings, and partners with technology teams to reduce risk. Contributes to testing methodologies, tooling, automation, and technical guidance that improve the effectiveness and scalability of the penetration testing program.

Telecommuting/Remote workstyle may be considered for well-qualified individuals located outside of the Truist footprint. Teammate will work hours supporting Eastern Standard Time

For this opportunity, Truist will not sponsor an applicant for work visa status or employment authorization, nor will we offer any immigration-related support for this position (including, but not limited to H-1B, F-1 OPT, F-1 STEM OPT, F-1 CPT, J-1, TN-1 or TN-2, E-3, O-1, or future sponsorship for U.S. lawful permanent residence status.)

Essential Duties And Responsibilities

• Conducts black box, grey box and assumed breach penetration tests of enterprise z/OS environments, covering the USS (Unix System Services), external security managers (RACF, ACF2, Top Secret) subsystems, (CICS, IMS, db2, MQ) batch processing (JCL, JES2) TSO/ISPF, and network facing services (TN3270, FTP, Z/OS Connect and Rest APIs, NJE)
• Uses manual techniques custom scripting (REXX, JCL, Assembler, Python) and offensive tooling to enumerate users and resources, map datasets, access unprotected spool and job output, and exploit misconfigured CICS transactions, and insecure interfaces)
• Evaluates exploitability and business impact and applies sound judgment when determining finding severity and risk.
• Documents findings with clear reproduction steps, supporting evidence, impact statements, and practical remediation recommendations.
• Presents and defends technical findings in discussions with application teams, mainframe engineers, technology leaders, risk partners, and other stakeholders.
• Performs validation and retesting to confirm remediation and risk reduction, and maintains testing evidence needed to support audit, regulatory, and compliance requirements (PCI DSS, SOX)
• Partners with internal and external testing teams to improve mainframe testing coverage, methodologies, playbooks, tooling, automation, and repeatable processes.
• Performs peer reviews of penetration testing reports and provides technical guidance and mentorship to other security professionals.
• Maintains current knowledge of mainframe attack techniques, security controls, platform changes, offensive security practices, and relevant industry threats.

Qualifications

Required Qualifications

• Bachelor’s degree or equivalent education, training, and work-related experience.
• Minimum of 7 years of experience in security engineering or related cybersecurity roles.
• Deep specialized knowledge in cybersecurity principles, theories, and concepts.
• Proven experience in software development lifecycle security practices.
• Deep knowledge of threat modeling, security testing, and penetration testing.
• Experience implementing and managing complex information security technologies.

Preferred Qualifications

• Five or more years of penetration testing, red team, offensive security, vulnerability research, or related cybersecurity experience.
• Hands-on experience assessing mainframe environments, including z/OS and common security components such as RACF, ACF2, or Top Secret.
• Knowledge of mainframe architecture, identity and access management, privileged access, JCL, TSO/ISPF, CICS, Db2, network services, system configuration, and security hardening.
• Experience identifying and validating mainframe vulnerabilities, misconfigurations, excessive access, insecure interfaces, and attack paths between mainframe and distributed environments.
• Strong technical writing and communication skills, including the ability to explain and defend technical findings to technical and non-technical audiences.
• Ability to independently manage multiple testing engagements, adjust approach as priorities and requirements evolve, and drive work to completion.
• Experience developing scripts, automation, or AI-enabled tooling that streamlines testing activities and improves the efficiency of repeatable processes.
• Experience in banking, financial services, or another highly regulated industry.
• Relevant offensive security certifications, such as OSCP, OSEP, OSWE, GPEN, GXPN, or equivalent credentials.

The annual base salary for this position is $140,000 - $180,000. Additional incentive pay is available for this position.

General Description of Available Benefits for Eligible Employees of Truist Financial Corporation: All regular teammates (not temporary or contingent workers) working 20 hours or more per week are eligible for benefits, though eligibility for specific benefits may be determined by the division of Truist offering the position. Truist offers medical, dental, vision, life insurance, disability, accidental death and dismemberment, tax-preferred savings accounts, and a 401k plan to teammates. Teammates also receive no less than 10 days of vacation (prorated based on date of hire and by full-time or part-time status) during their first year of employment, along with 10 sick days (also prorated), and paid holidays. For more details on Truist’s generous benefit plans, please visit our Benefits site. Depending on the position and division, this job may also be eligible for Truist’s defined benefit pension plan, restricted stock units, and/or a deferred compensation plan. As you advance through the hiring process, you will also learn more about the specific benefits available for any non-temporary position for which you apply, based on full-time or part-time status, position, and division of work.

Truist is an Equal Opportunity Employer that does not discriminate on the basis of race, gender, color, religion, citizenship or national origin, age, sexual orientation, gender identity, disability, veteran status, or other classification protected by law. Truist is a Drug Free Workplace.

EEO is the Law E-Verify IER Right to Work