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Closed on August 20, 2026.
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Senior Security Consultant (Mainframe Penetration Tester)
Senior
Application Security
CICS
Cybersecurity Tools
Information Security
Information Technology (IT)
InfoSec
Mainframe
Penetration Testing
Security
Security Testing
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Job Description
Senior security consultant focusing on mainframe penetration testing (z/OS), onsite in Minneapolis, MN.
Responsibilities
- Perform comprehensive penetration tests across networks, applications, platforms, and z/OS components, including CICS, IMS, and Db2.
- Create and deliver clear, actionable penetration test reports to clients.
- Collaborate with clients to develop remediation strategies that strengthen their security posture.
- Research and develop innovative techniques, tools, and methodologies for penetration testing services.
- Contribute to the ongoing development and enhancement of NetSPI services and processes, and participate in thought leadership via blogs, presentations, white papers, webinars, podcasts, vlogs, and tweets.
- Provide pre-sales support by assisting with scoping prospective engagements.
- Act as a technical resource for internal team members on in-depth questions or security best practices.
- Lead QA activities within assigned service lines.
- Other duties as assigned.
Requirements
- Bachelor’s degree or higher, with a focus on IT, Computer Science, Engineering or Math or equivalent experience.
- 3-5 years of experience in penetration testing, including network, web or thick client application, and operating system testing.
- Experience with offensive toolkits used for network and application penetration testing.
- Strong verbal and written communication skills.
- Knowledge of z/OS fundamentals including, but not limited to: TSO, JCL, JES2, USS, Networking and at least one ESM (RACF, ACF2, Top Secret).
- Programming experience in one or more of the following languages: Assembler, C, C++, REXX, Python.
- Experience securing or managing z/OS-based systems.
- Experience with pentesting frameworks or certifications such as PTAS, PTES, OSCP or other offensive security certifications.
Technologies
- z/OS
- CICS
- IMS
- Db2
- TSO
- JCL
- JES2
- USS
- RACF
- ACF2
- Top Secret
- Assembler
- C
- C++
- REXX
- Python
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