Mainframe Operating Systems Engineer

Fidelity; United States; On-site; USD 120,000 - 165,000; Full time

Benefits offered by this job

Competitive benefits

Job summary

Fidelity is seeking a Senior Mainframe Operating Systems Engineer to own the enterprise z/OS environment. You will lead upgrades, modernization, and automation initiatives while collaborating with infrastructure, development, architecture, and vendor teams.

The role requires deep knowledge of IBM z/OS, SMP/E, and mainframe tooling, with a focus on reliability, security, and performance in a large enterprise setting. This is a senior, collaborative, on-site position at Fidelity.

Qualifications

• 5–8+ years hands-on experience supporting IBM z/OS in a systems programming or OS engineering role.
• Experience administering and supporting large-scale enterprise mainframe environments.
• 5+ years installing, upgrading, maintaining IBM/ISV software with SMP/E.
• Experience with Parallel Sysplex, CFs, high-availability mainframe architectures.
• Familiarity with mainframe tooling and modern DevOps concepts.

Responsibilities

• Stability, availability, security, and performance of Fidelity's enterprise z/OS environment.
• Lead OS upgrades, maintenance, and technology refresh initiatives.
• Automate operations using JCL, REXX, Python, Ansible, and platform tools.
• Provide production support, incident and problem management, and root cause analysis.

Skills

IBM z/OS

SMP/E

Parallel Sysplex

z/OSMF

JCL

REXX

Python

Unix System Services

Automation

DevOps

Zowe

System Automation

Education

Bachelor's degree in Computer Science, IT, Engineering, or related field

Tools

Top Secret

Control-M

MFX

CA-1

Endevor

z/OSMF

SYSVIEW

Omegamon

Mobius

Job description

Job Description:

Note: Fidelity will not provide immigration sponsorship for this position

Senior Mainframe Operating Systems Engineer

The Team

The Mainframe Operating Systems team is responsible for the engineering, support, stability, security, and modernization of Fidelity's enterprise mainframe platform. The team provides the foundational operating system services that support critical business applications across the organization. By maintaining a secure, resilient, and high-performing platform, the team enables business areas to deliver services to customers with confidence and reliability.

As a Senior Mainframe Operating Systems Engineer, you will work closely with infrastructure teams, application development teams, architecture teams and software vendors. The team is focused on maintaining operational excellence, keeping software current, implementing new technologies, and continuously improving the mainframe environment through automation and modernization initiatives.

You will be part of a collaborative team that values technical expertise, innovation, continuous learning, and knowledge sharing while supporting one of the industry's largest and most sophisticated mainframe environments.

The Expertise You Have

• Bachelor's degree in Computer Science, Information Technology, Engineering, or a related field, or equivalent professional experience.
• 5 - 8+ years of hands-on experience supporting IBM z/OS operating systems in a systems programming or operating systems engineering role.
• Experience administering and supporting large-scale enterprise mainframe environments.
• 5+ years experience installing, customizing, upgrading, and maintaining IBM and Independent Software Vendor software products using SMP/E.
• Experience supporting Parallel Sysplex environments, Coupling Facilities, and high-availability mainframe architectures.
• Experience supporting software products including Top Secret, Control-M, MFX, CA-1, Endevor, z/OSMF, System Automation, NetView, OMEGAMON, SYSVIEW, Mobius, and related technologies.
• Experience with z/OS Unix System Services (USS), JCL, REXX, Python, and shell scripting (KSH/SH) to automate operational and engineering activities.
• Experience with change management, incident management, problem management, and software lifecycle practices.
• Experience working directly with software vendors to resolve technical issues and perform root cause analysis.
• Experience supporting disaster recovery solutions including GDPS, Global Mirror, and Metro Mirror.
• Experience with modern mainframe tooling, automation frameworks, DevOps practices, and platform engineering concepts.

The Skills You Bring

• You bring advanced knowledge of IBM z/OS operating systems and core system components.
• You demonstrate expertise in software installation, customization, maintenance, and support using SMP/E processes.
• You bring strong technical problem-solving and analytical skills when diagnosing complex operating system, infrastructure, and system software issues.
• You communicate effectively with both technical and non-technical partners and can explain complex concepts clearly.
• You collaborate effectively across infrastructure, application development, architecture, and vendor organizations.
• You take initiative in identifying opportunities to improve system reliability, automation, and operational efficiency.
• You bring experience working with technologies such as z/OSMF, Zowe, Unix System Services, JCL, REXX, Python, and Git-based development practices.
• You demonstrate strong organizational skills while managing multiple priorities in a fast-paced environment.
• You contribute as a technical leader by sharing knowledge, mentoring team members, and driving engineering best practices.
• You work effectively with software vendors and internal stakeholders to resolve issues, evaluate solutions, and implement improvements.
• You possess strong written and verbal communication skills and can effectively document and present technical information to a variety of audiences.

The Value You Deliver

• Supporting the stability, availability, security, and performance of Fidelity's enterprise z/OS operating system environment.
• Installing, customizing, upgrading, and maintaining IBM and Independent Software Vendor software products while ensuring software currency and platform resiliency.
• Leading operating system upgrades, software maintenance activities, technology refresh initiatives, and infrastructure modernization efforts.
• Automating operational processes utilizing JCL, REXX, Python, Ansible, and other platform engineering tools to improve efficiency and reduce operational risk.
• Supporting critical incident resolution, problem determination, root cause analysis, and production support activities for business-critical systems.
• Advancing modern mainframe capabilities through technologies such as z/OSMF, Zowe, GitHub Enterprise, APIs, IBM Open Enterprise SDK for Python, and contemporary development practic

",