Senior z/OS Unix & zLinux Integration Engineer

Ensono; Hyderabad; On-site; INR 11,483,000 - 17,225,000; Full time

Job summary

Ensono is seeking an experienced Senior z/OS UNIX & zLinux Integration Engineer. You will lead modernization efforts, integrating mainframe systems with modern DevOps tools, z/OSMF, Zowe, and IBM Wazi.

The role emphasizes automation, API exposure, and cross-team collaboration. You will design and implement enhancements to USS and zLinux, enable REST APIs, and support CI/CD pipelines while mentoring colleagues and shaping the integration strategy.

Qualifications

• Advanced knowledge of z/OS UNIX System Services (USS) and UNIX on z/OS, with shell and POSIX interfaces.
• Deep understanding of Linux on IBM Z, including system installation and performance tuning.
• Experience with modern mainframe tools (z/OSMF, Zowe, IBM Wazi) for API-driven environments.
• Proficiency in scripting (Python/REXX) and shell scripting for automation.
• Strong knowledge of SMP/E, networking (TCP/IP) and cross-platform security.
• Experience with DevOps practices, CI/CD pipelines, and mainframe automation (Git, Ansible).

Responsibilities

• Design and implement enhancements to z/OS UNIX and zLinux environments for reliability and scalability.
• Integrate mainframe with modern DevOps pipelines and cloud-ready interfaces.
• Develop secure API layers and interaction points between mainframe and distributed systems.
• Provide third-level support for USS and zLinux issues and drive root-cause analysis.
• Mentor team members and contribute to architectural roadmaps and best practices.
• Collaborate with Core z/OS Engineering, Middleware, Security, and Cloud Enablement teams.

Skills

USS (z/OS UNIX)

z/OS Linux

IBM Z

Zowe / z/OSMF

DevOps on Mainframe

REST APIs

CI/CD pipelines

Git

Ansible

Wazi

ZoweCLI

Tools

Git

Ansible

Wazi

ZoweCLI

IBM Cloud

Job description

We are an equal opportunity employer. All qualified applicants will be considered for employment without regard to caste, colour, creed, religion, gender, gender identity, sexual orientation, age, disability, HIV status, or any other status protected by law. Candidates with disabilities who require accommodations during the recruitment process are encouraged to contact our Talent Acquisition team to place a request.

About Us (Ensono)

Ensono is an expert technology adviser and managed service provider. As a relentless ally, we accelerate clients’ digital transformation to achieve business outcomes that stand to last. Our dedicated team helps organizations optimize today’s systems across any hybrid environment with services such as consulting, mainframe and application modernization, public cloud migration and cloud-native development. With certified experts in AWS, Azure and Google Cloud and recognized as Microsoft Datacenter Transformation Partner of the Year, Ensono has over 3500+ associates globally and is headquartered in greater Chicago.

Your role:

Asa Senior z/OS UNIX &zLinuxIntegration Engineer, you will spearhead efforts to modernize and integrate our mainframe with contemporary platforms and tools. We’reseeking an experienced z/OS Systems Engineer with expertisein z/OS UNIX System Services (USS) and IBMzlinux (Linux on IBM Z) to drive innovation in bridging mainframe and distributed systems. In this role, you will: Design and implement enhancements to our z/OS UNIX and zLinux environments – ensuring robust, secure, and scalable UNIX system services on z/OS and optimizing Linux on IBM Z for enterprise workloads. You will apply best-in-class engineering practices to develop new features, automate manual tasks, and improve the developerexperience on the mainframe.

• Accelerate Modernization–Leverage modern interfaceslikez/OS Management Facility (z/OSMF), theZoweframework, andIBM Wazito integrate mainframe systems intocontemporary DevOps and cloud environments. This includes enabling REST APIs and CLI tools that allow distributed teams and modern applications to seamlessly interact with z/OS resources. You will play a key role in making the mainframe a moreopen and agile platform, bridging the gap between legacy systems and modern development practices.
• Implement DevOps and CI/CD practicesfor mainframe – Work on integrating z/OS with enterpriseDevOps pipelines, enabling efficient use of mainframe capabilities in continuous integration and delivery processes. Introduce and support tools such asGit or Ansiblefor z/OS automation, and promote the adoption of modern mainframe development environments (e.g., usingZoweCLI and APIsfor automation; exploring containerized dev/test frameworks likeIBM Wazifor z/OS).
• Ensure system interoperability– Develop andmaintaininterfaces between z/OS and distributed (Linux/Unix) systems, enabling smooth data exchange and process integration. This may involve building secure API layers, cross-platform file sharing (e.via NFS orZoweAPI Mediation Layer), and connecting mainframe services to cloud or hybrid environments.
• Operational Excellence– Integrate advancedobservabilityandmonitoringfor USS andzLinuxprocesses, using tools like system logs,SMF data, and modern monitoring dashboards (Grafana, Splunk, etc.) to ensure performance and reliability. You will alsoprovide third-level supportfor complex UNIX and Linux-related issues on the mainframe, employing deep problem analysis toidentifyroot causes and permanent fixes.
• Technical leadership– Asa senior engineer, you will make high-impact decisionsregardingour mainframe integration strategy.You’llpresent solution designs and roadmaps tostakeholders and technical leadership, advocating for improvements that enhance agility and align with business needs. You will collaborate with architects and other senior engineers to design hybrid solutions thatleveragemainframe strengths in a modern IT landscape. Furthermore, you will contribute to our culture bymentoring colleagues(e.g., in using new tools or approaches) and by sharingexpertisein internal forums and guilds.

Your team:

You’ll be part of theMainframe Platform Core Servicescrew, working within a specializedzSoftwarepod.This cross-functional team focuses on evolving the mainframe to supportnew interfaces and hybrid-cloud connectivity. You will closely partner with team members inCore z/OS Engineering, Middleware (CICS/MQ) Integration, Security, and Cloud Enablementto develop end-to-end solutions that connect mainframe services with modern platforms. The teamoperatesglobally, soyou’llcollaborate with colleagues across different regions and time zones, bringing together a variety of skills to modernize our mainframe environment. The working model is agile, emphasizing iterative improvements, quick feedback loops, and continuous learning as we adoptnew technologiesin the mainframe context.

Yourexpertise:

You are a seasoned mainframe engineer (8–10+ years of experience) with a blend oftraditional mainframe skills and modern tooling knowledge. Key qualifications include:

• z/OS UNIX System Services (USS)– Advanced knowledge ofUNIX on z/OS(shell environment, POSIX interfaces,zFSfile system management, Unix security model) and the ability to develop and debug programs or scripts running under USS. Experience porting or integrating open-source tools (e.g., Git, Python) onto USS is an advantage.
• Linux on IBM Z–In-depth understanding ofzLinux(Linux running in KVM or LPAR on IBM Z hardware), including system installation, networking, and performance tuning in a mainframe environment. Familiarity with virtualization viaKVMand concepts like IFL processors, CPU management, and resource sharing on IBM Z is expected.
• Modernization Tools– Hands-on experience with or strong knowledge ofmodern mainframe tools such asz/OSMF(IBM z/OS Management Facility) for web-based system management,Zowe(Open Mainframe Project’s framework for mainframe integration) — e.g., usage ofZoweCLI/Explorer and API mediation for connecting mainframe services with cloud – andIBM Wazifor cloud-based mainframe development/testing. Your ability toutilizethese tools and frameworks is critical for enabling anAPI-driven, cloud-integrated mainframeenvironment.
• Systems Programming & Scripting– Proficiency inshell scripting, REXX, and programming languages likePython or C/C++on z/OS or Linux, enabling you to create automation scripts, API endpoints, and system utilities bridging z/OS with distributed systems. Exposure to infrastructure-as-code (e.g.,Ansible on z/OS) is a plus, emphasizing code-driven system management.
• Software Maintenance & Configuration – Solid knowledge of SMP/E, with proven experience in installing, configuring, and migrating new product versions.
• Networks & Security– Good grasp of mainframe networking (TCP/IP on z/OS) andcross-platform security protocols. Understanding how to manage secure APIs and connectivity between z/OS and external systems (e.g.,leveragingencryption, RACF rules for cross-platform access, etc.) is important for safe integration.
• Performance & Reliability– Experience optimizing the performance of USS workloads andzLinuxinstances, including resource allocation, workload balancing, and monitoring of key metrics (like CPU, memory usage on IFLs, network throughput) to ensure stable operations. Familiarity withmainframe performance toolsand logs (SMF, RMF) is expected.
• Strategic & Innovative Mindset– Passion formodernizing mainframe usageand staying updated on industry trends (for example, containerization onzLinux, cloud integration, DevOps practices for mainframe). Ability to evaluate emerging technologies and incorporate them into the mainframe environment whenbeneficial.
• Communication & Collaboration–Excellent English communication skillsareessential, enabling you to collaborate effectively with global teams and to clearly present modernization plans to both technical and non-technical stakeholders. You are comfortable in a leadership capacity, coordinating initiatives acrossdifferent groups, and nurturing a culture where mainframe and distributed teams collaborate seamlessly on hybrid solutions.

By joining our team as a senior mainframe engineer in any of these roles, you will be empowered to work independently, make critical technical decisions, and visibly shape the future of our mainframe platform

in a dynamic, agile environment.You’llleverageyour deep specialty—be it base z/OS systems, workload automation, or mainframe Unix/Linux integration to drive high-impact improvements that keep our mainframe systems robust, modern, and aligned with business needs. We value proactive engineering leadership,strong communication, and a commitment to continuous learning and innovation across all these positions. Each role offers the opportunity to take ownership of technical solutions and present them to stakeholders and technology leadership, ensuring your contributions directly influence our organization’s success.