z/OS System Operators (ES27G)
The IBM z/OS System Operators (ES27G) course equips new IT personnel with foundational skills to manage z/OS environments, issue MVS commands, and operate system consoles—solving the critical industry challenge of mainframe skills shortages, with 80% of Fortune 500 companies still relying on IBM Z systems. Designed for aspiring system operators, it delivers hands-on experience with JES2, TSO/E, SDSF, and IPL processes.
This course prepares learners for the IBM System z and z/OS Fundamentals Mastery (P4070-005) exam, enhancing career readiness with Koenig’s official vendor-authorized courseware and 30-day lab access. Graduates gain confidence to support mission-critical mainframe operations in high-demand enterprise roles.
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Course Overview
The IBM z/OS System Operators (ES27G) course delivers foundational training for IT professionals beginning their journey in mainframe operations, specifically targeting roles such as system operators, mainframe administrators, and junior systems programmers. Designed for individuals with minimal prior experience in z/OS environments, this course provides a structured pathway to mastering core operational concepts of IBM Z systems. With 80% of Fortune 500 companies still relying on mainframe infrastructure for mission-critical workloads, the demand for skilled z/OS operators remains high, making this training essential for entering a stable and high-demand sector of enterprise IT.
Participants engage with key IBM technologies including z/OS, Job Entry Subsystem 2 (JES2), Time Sharing Option (TSO), System Display and Search Facility (SDSF), Processor Resource/Systems Manager (PR/SM), and the z/OS Communications Server. The course includes hands-on labs conducted in a live IBM Z environment, where students perform real-world tasks such as issuing MVS commands, managing job queues, configuring console settings, and executing IPL (Initial Program Loader) procedures. Using the Multi Console Support (MCS) system, learners gain practical experience monitoring system status, interpreting command outputs, and managing device configurations—skills directly transferable to production data center operations.
While the z/OS System Operators (ES27G) course does not map to a single certification exam, it aligns with the foundational knowledge required for the IBM Professional Certificate in Mainframe Systems Operator and prepares learners for advanced roles in system programming and administration. Graduates can expect strong career progression, with systems programmers leveraging z/OS skills earning an average annual salary of $110,880 according to PayScale (2026). Koenig Solutions enhances this learning experience with Guaranteed-to-Run scheduling and 1-on-1 training options using official IBM courseware, ensuring personalized, reliable access to expert instruction. Completing this course positions professionals to advance into critical mainframe support roles, contributing to the ongoing operation of the world’s most secure and scalable enterprise systems.
Skills You'll Gain
Prerequisites
- A foundational understanding of mainframe computing architecture and IBM z/OS operating system concepts is essential before pursuing the IBM z/OS System Operators (ES27G) certification. Familiarity with z/OS user interfaces like TSO/E and ISPF, along with experience navigating system consoles and interpreting messages, ensures a smooth learning curve. Knowledge of job entry subsystem (JES) and batch processing fundamentals further prepares you for real-world z/OS system operations. Completing this prerequisite course provides the critical background needed to excel as a z/OS System Operator, enabling you to manage and troubleshoot mainframe environments confidently. This solid foundation helps reduce onboarding time and accelerates your path to becoming a certified z/OS System Operator, a role vital for maintaining enterprise mainframe stability and performance. Trust in IBM’s industry-leading training to boost your skills and career prospects in mainframe operations.
What's Included in Your Training
Every enrollment comes packed with resources to maximise your learning and exam success
Exam Preparation Materials
Practice Test Questions (200+)
Certificate of Completion
Post-Training Support (30 days)
Session Recording Access
Free Rescheduling (7+ days notice)
Career Outcomes
of ES27G certified professionals report career advancement within 6 months
Salary Impact
Average salary increase reported after obtaining the ES27G certification
*Source: Glassdoor / LinkedIn 2025
Job Roles
- z/OS System Operator
- Mainframe Systems Administrator
- Mainframe Operations Analyst
- z/OS Production Support Specialist
- System Programmer
- Mainframe Operator
Companies Hiring
and 5,000+ organizations worldwide seeking ES27G certified professionals
Course Student Reviews
Real results from IT professionals who trained with Koenig — rated 4.9/5 from 18,400+ verified reviews.
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“Passed AZ-104 on first attempt. The MCT knew the exact exam patterns and the labs were exactly what Microsoft tests. Worth every penny.”
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“SC-900 and SC-300 back to back — both cleared first try. The security curriculum at Koenig is incredibly thorough and up to date.”
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“DP-600 Fabric certification done in 3 weeks of part-time study. The customised schedule around my timezone was a lifesaver.”
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“Our whole DevOps team got AZ-400 certified through Koenig's corporate training. Smooth logistics and top-tier MCTs throughout.”
AZ-400 Team Training ✓ Verified -
★★★★★
“Passed AZ-104 on first attempt. The MCT knew the exact exam patterns and the labs were exactly what Microsoft tests. Worth every penny.”
AZ-104 Certified ✓ Verified -
★★★★★
“I trained 15 of my team members for SC-200. Koenig's on-site delivery was seamless and all 15 passed within 3 months.”
Enterprise Client ✓ Verified -
★★★★★
“The 1-on-1 format was a game changer. My trainer adjusted the pace to my schedule and I cleared PL-300 while working full-time.”
PL-300 Certified ✓ Verified -
★★★★★
“From AZ-900 to AZ-305 in 6 months. Koenig's structured roadmap and MCT mentoring made the expert level achievable.”
AZ-305 Expert ✓ Verified -
★★★★★
“As an L&D head I've used 5 training vendors. Koenig's MCT quality, MOC materials, and ESI compliance is in a different league.”
100+ Learners Trained ✓ Verified -
★★★★★
“SC-900 and SC-300 back to back — both cleared first try. The security curriculum at Koenig is incredibly thorough and up to date.”
SC-300 Certified ✓ Verified -
★★★★★
“AI-102 was daunting but the trainer broke it down perfectly. Real Azure OpenAI labs made the difference. Highly recommend.”
AI-102 Certified ✓ Verified -
★★★★★
“DP-600 Fabric certification done in 3 weeks of part-time study. The customised schedule around my timezone was a lifesaver.”
DP-600 Certified ✓ Verified -
★★★★★
“Our whole DevOps team got AZ-400 certified through Koenig's corporate training. Smooth logistics and top-tier MCTs throughout.”
AZ-400 Team Training ✓ Verified
-
★★★★★
“Passed AZ-104 on first attempt. The MCT knew the exact exam patterns and the labs were exactly what Microsoft tests. Worth every penny.”
AZ-104 Certified ✓ Verified -
★★★★★
“I trained 15 of my team members for SC-200. Koenig's on-site delivery was seamless and all 15 passed within 3 months.”
Enterprise Client ✓ Verified -
★★★★★
“The 1-on-1 format was a game changer. My trainer adjusted the pace to my schedule and I cleared PL-300 while working full-time.”
PL-300 Certified ✓ Verified -
★★★★★
“Passed AZ-104 on first attempt. The MCT knew the exact exam patterns and the labs were exactly what Microsoft tests. Worth every penny.”
AZ-104 Certified ✓ Verified -
★★★★★
“I trained 15 of my team members for SC-200. Koenig's on-site delivery was seamless and all 15 passed within 3 months.”
Enterprise Client ✓ Verified -
★★★★★
“The 1-on-1 format was a game changer. My trainer adjusted the pace to my schedule and I cleared PL-300 while working full-time.”
PL-300 Certified ✓ Verified
-
★★★★★
“From AZ-900 to AZ-305 in 6 months. Koenig's structured roadmap and MCT mentoring made the expert level achievable.”
AZ-305 Expert ✓ Verified -
★★★★★
“As an L&D head I've used 5 training vendors. Koenig's MCT quality, MOC materials, and ESI compliance is in a different league.”
100+ Learners Trained ✓ Verified -
★★★★★
“SC-900 and SC-300 back to back — both cleared first try. The security curriculum at Koenig is incredibly thorough and up to date.”
SC-300 Certified ✓ Verified -
★★★★★
“From AZ-900 to AZ-305 in 6 months. Koenig's structured roadmap and MCT mentoring made the expert level achievable.”
AZ-305 Expert ✓ Verified -
★★★★★
“As an L&D head I've used 5 training vendors. Koenig's MCT quality, MOC materials, and ESI compliance is in a different league.”
100+ Learners Trained ✓ Verified -
★★★★★
“SC-900 and SC-300 back to back — both cleared first try. The security curriculum at Koenig is incredibly thorough and up to date.”
SC-300 Certified ✓ Verified
-
★★★★★
“AI-102 was daunting but the trainer broke it down perfectly. Real Azure OpenAI labs made the difference. Highly recommend.”
AI-102 Certified ✓ Verified -
★★★★★
“DP-600 Fabric certification done in 3 weeks of part-time study. The customised schedule around my timezone was a lifesaver.”
DP-600 Certified ✓ Verified -
★★★★★
“Our whole DevOps team got AZ-400 certified through Koenig's corporate training. Smooth logistics and top-tier MCTs throughout.”
AZ-400 Team Training ✓ Verified -
★★★★★
“AI-102 was daunting but the trainer broke it down perfectly. Real Azure OpenAI labs made the difference. Highly recommend.”
AI-102 Certified ✓ Verified -
★★★★★
“DP-600 Fabric certification done in 3 weeks of part-time study. The customised schedule around my timezone was a lifesaver.”
DP-600 Certified ✓ Verified -
★★★★★
“Our whole DevOps team got AZ-400 certified through Koenig's corporate training. Smooth logistics and top-tier MCTs throughout.”
AZ-400 Team Training ✓ Verified
Frequently Asked Questions
Everything you need to know about the ES27G training course
Is the certification exam included in the z/OS System Operators (ES27G) course, and what is the exam fee?
What training formats does Koenig offer for z/OS System Operators (ES27G), and is Guaranteed-to-Run scheduling available?
How long is lab access provided for z/OS System Operators (ES27G), and what environment is used?
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How long is the z/OS System Operators certification valid, and what is the renewal process and cost?
What post-training support does Koenig provide after completing the z/OS System Operators (ES27G) course?
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