Mainframe Cybersecurity Specialist

Who We Are

At Kyndryl, we run and reimagine the mission-critical technology systems that drive advantage for the world’s leading businesses.  We are at the heart of progress; with proven expertise and a continuous flow of AI-powered insight, enabling smarter decisions, faster innovation, and a lasting competitive edge. For our people—Kyndryls—that means doing purposeful work that powers human progress. Join us and experience a flexible, supportive environment where your well-being is prioritized and your potential can thrive.

The Role

Your role

As a Mainframe Cybersecurity Specialist, you will be responsible for securing IBM z/OS mainframe environments by implementing, administering, and maintaining enterprise security controls. The role focuses on protecting critical business systems, ensuring regulatory compliance, managing user access, and mitigating security risks across the mainframe infrastructure.

What you will do

• Administer and maintain mainframe security products such as RACF, ACF2.
• Manage user provisioning, access controls, authentication, and authorization processes.
• Conduct security audits, compliance reviews, and risk assessments for mainframe environments.
• Monitor and respond to security incidents, vulnerabilities, and unauthorized access attempts.
• Implement security policies, standards, and controls aligned with organizational and regulatory requirements.
• Perform security reviews of mainframe applications, databases, and infrastructure components.
• Collaborate with infrastructure, operations, application, and audit teams to strengthen the organization's security posture.
• Configure and maintain security monitoring, reporting, and alerting tools such as IBM zSecure.

Your future at Kyndryl

Every position at Kyndryl offers a way forward to grow your career, from Junior System Administrator to Architect. We have opportunities for Cloud Hyperscalers that you won’t find anywhere else, including hands-on experience, learning opportunities, and the chance to certify in all four major platforms. One of the benefits of Kyndryl is that we work with clients in a variety of industries, from banking to retail. Whether you want to broaden your knowledge base or narrow your scope and specialize in a specific sector, you can find your opportunity here.

Who You Are

You’re good at what you do and possess the required experience to prove it. However, equally as important – you have a growth mindset; keen to drive your own personal and professional development. You are customer-focused – someone who prioritizes customer success in their work. And finally, you’re open and borderless – naturally inclusive in how you work with others.

Required Technical and Professional Expertise

• 7 to 10 years of hands-on experience in ACF2 security administration, identity management, and mainframe access control within z/OS environments.
• Strong knowledge of mainframe security principles, compliance requirements, and industry security best practices.
• Expertise in administering and maintaining ACF2 IDs, dataset rules, resource rules, and Global System Options (GSO).
• Proficient in analyzing, implementing, and troubleshooting ACF2 security architecture, control mechanisms, and z/OS security frameworks.
• Hands-on experience with ACF2 utilities including ACFBATCH, ACFBSYNC, ACFCOMP, ACFDCMP, ACFNRULE, ACFRGP, and ACFXREF.
• Experienced in security monitoring, audit support, incident investigation, and policy compliance management for enterprise mainframe systems.
• Skilled in end-to-end digital certificate deployment, PKI management, and IBM Z Pervasive Encryption implementation to strengthen mainframe cybersecurity posture.

Preferred Technical and Professional Experience

• Strong proficiency in TSO, JCL, REXX, JES2, ISPF, and ACF2 utilities, with hands-on experience in mainframe security administration and troubleshooting.
• Experience with zSecure, ETFA, CA Cleanup, and other security monitoring, auditing, and compliance tools; exposure to additional mainframe security products is preferred.
• Excellent communication, analytical, and problem-solving skills, with the ability to manage multiple priorities and collaborate effectively in global teams.
• Bachelor's or Master's degree in a relevant field; ITIL certification required, while CISA or other security certifications are considered an advantage.

Being You

The “Kyn” in Kyndryl means kinship, which represents the strong bonds we have with each other, our customers and our communities. We focus on ensuring all Kyndryls feel included and we welcome people of all cultures, backgrounds, and experiences. Even if you don’t meet every requirement, we encourage you to apply. We believe in growth, and we’re excited to see what you can bring. At Kyndryl, employee feedback has told us that our number one driver of employee engagement is belonging. That sense of belonging — being a valued, respected, trusted member of the team — is fundamental to our culture and fueling great experiences for our customers. This dedication to welcoming everyone into our company means that Kyndryl gives you the ability to thrive and contribute to our culture of empathy and shared success. That’s The Kyndryl Way.

What You Can Expect

Your career with us isn’t just a job—it’s an adventure with purpose.  We offer a dynamic, hybrid-friendly culture that supports your well-being and empowers you to grow. Our Be Well programs are thoughtfully designed to support your financial, mental, physical, and social health—because we know that when you feel your best, you do your best.
From your very first day, you’ll dive into impactful work that powers the systems our customers rely on every day. You won’t just contribute—you’ll make a difference, tackling meaningful projects that sharpen your skills and fuel your growth.
We’re here to champion your journey. With powerful tools to chart your career path, personalized development goals aligned with your ambitions, and continuous feedback to keep you inspired and on track, you’ll have everything you need to thrive and evolve. You’ll develop in-demand skills to grow your career and achieve your ambitions with access to cutting-edge learning opportunities—from certifications with Microsoft, Google, and Amazon to coaching and hands-on experiences. And through it all, you’ll be part of a culture that values empathy, restless learning, and a devotion to shared success.
We want you to thrive here—and we’re committed to helping you do just that. Ready to make an impact? Join us and help shape what’s next.

Get Referred!

If you know someone that works at Kyndryl, when asked ‘How Did You Hear About Us’ during the application process, select ‘Employee Referral’ and enter your contact's Kyndryl email address.