IBM Mainframe Maintenance
At Top Gun Technology, we offer comprehensive hardware support services for the IBM Mainframe product line, including call home, microcode updates, and all hardware break/fix from a labor and parts perspective. Our team of experienced engineers provides 24/7 support to ensure that your IBM Z infrastructure is always operating at peak performance. Enterprises around the globe trust Top Gun to maintain the reliability and efficiency of their mission-critical infrastructure. With our tailored hardware support services, you can have peace of mind knowing that your IBM Z systems are in good hands, enabling you to focus on your core business objectives.
IBM Z Mainframe Supported
In the IBM world, engineers possessing the skills capable of the highest expertise are recognized as “Top Guns.”
Top Gun is globally recognized as the top performer for IBM Z maintenance and support for enterprise-critical hardware within the data center. Top Gun Z maintenance support helps you avoid problems before they happen. Our highly skilled IBM Z engineers act as an extension of your IT staff; issues are resolved quickly, improving your system availability and productivity.
Our TPM 2.0 Z support model is designed to provide you with more efficient and robust support to expedite your resolution time and maintain higher systems availability. Top Gun offers unmatched expertise supporting IBM Z in the market and extensive support experience up to the z15.
z15 T02 | z15 | z14-ZR1 | z14 |
---|---|---|---|
z13s | z13 | zEC12 | zBC12 |
z196 | z114 | z10-EC | z10-BC |
z9-EC | z9-BC | z990 | z890 |
z900 | z800 |
Additional IBM Resources
NOW SUPPORTING IBM z15-8562 (T02)
Top Gun is pleased to announce it can now support the IBM z15-8562 (T02) mainframe and has become the first independent support company in the global marketplace to support this platform. First announced on September 12, 2019, IBM positioned the z15 as, “The enterprise platform for mission-critical hybrid multi-cloud, with new innovations across security, data privacy and resilience.” Further, Top Gun Technology is on schedule to launch support for the IBM-8561 (T01) in Q2 of 2023. At this time, Top Gun’s engineering team is thoroughly reviewing a complete 8561 system, on the floor of its R&D Facility in Prior Lake.
Combining IBM z15-8562 mainframe maintenance support with Top Gun’s mainframe software products consultation or its z/OS software support (z/OS, z/VM, z/VSE, Linux for IBM Z, DB2, CICS, DB/DC and MQSeries) can further supplement your IT efficiencies objectives. Top Gun can support your mission-critical IBM z15 environments long past OEM EoSL announcements and for as long as you choose, while optimizing your OpEx and CapEx budgets.
Top Gun is also a global leader in buying/selling pre-owned and refurbished (certified and banded) IBM Z mainframe hardware – whole systems, upgrades and parts. The purchase of any IBM Z systems from Top Gun will include “bundled” maintenance support agreements.
IBM Z MCLs
Top Gun works directly with IBM’s Technical Support Management Office in Poughkeepsie, NY for Z MCL SUL releases. This allows us to receive important alerts on MCL updates as they are announced by IBM.
Top Gun will then order the MCLs and Hyper MCLs from the TSMO through their approved ordering process. Top Gun will test those updates in our IBM Z lab in Prior Lake, MN and create a revision delta document that details the differences between releases.
We review that documentation with the client and in collaboration determine which updates are applicable to the environment before ordering and scheduling the update for the machines.
Once scheduled, a Top Gun field engineer will come onsite with the new code and apply it to the client’s HMCs and CPCs.

IBM Z CALL HOME
Top Gun has developed a proprietary call home tool. As part of the onboarding process, we will set up the existing HMCs to send alerts to Top Gun. Details provided by the alerts include:
- Client Name and Location
- Machine type, model number, and serial number
- Error information with FRU level details
- Part number, part location, FRU probability
Z SOFTWARE SUPPORT
We offer 24 x 7 technical support for z/OS and OEM software. We provide problem determination and take ownership of all incidents until closed.
- Severity 1 Response in 15 to 30 Minutes
- Problem Resolution Ownership
- Disaster Recovery Advising / Support
- Provide Answers to Research or “How to” Questions
- PTF for Problem Resolution
- 3rd Party Software Problem Support
- Unlimited Calls
CLIENT SUCCESS STORIES

UNCERTAIN TIMES
Faced with new production backorders and long lead times, this company’s procurement team discovered TGT’s availability of refurbished IBM Mainframes, technical implementation services, and ongoing maintenance support services.
WHY CHOOSE TOP GUN FOR IBM Z MAINTENANCE

ServiceNow™
The backbone of our ticketing, incident and asset management field service capabilities.

Experts
Top Gun L3 IBM Z technical support engineers are the best in the industry.

Service Network
Our engineer-staffed service network is located throughout the World, providing 24/7 support.
ACCOMMODATING. CUSTOMIZED. TOP LEVEL SUPPORT
Top Gun focuses on business outcomes that leverage our deep technical expertise to help clients achieve more benefits—including enabling employees, improving service levels, and delivering game‑changing economics.
24 x 7 x 2
24/7 Help Desk
24/7 Monitoring
2HR Onsite Tech Response
Top Gun Field Engineers
Top Gun L3 Tech Support
Service Delivery Manager
ServiceNow Portal
TrueView™ Integration
24 x 7 x 4
24/7 Help Desk
24/7 Monitoring
4HR Onsite Tech Response
Top Gun Field Engineers
Top Gun L3 Tech Support
Service Delivery Manager
ServiceNow Portal
TrueView™ Integration
24 x 7 x NBD
24/7 Help Desk
24/7 Monitoring
NBD Onsite Tech Response
Top Gun Field Engineers
Top Gun L3 Tech Support
Service Delivery Manager
ServiceNow Portal
TrueView™ Integration
CUSTOM
Custom Help Desk
Custom Monitoring
Custom Tech Response
Top Gun Field Engineers
Top Gun L3 Tech Support
Service Delivery Manager
ServiceNow Portal
TrueView™ Integration
IBM Z FAQ
The TGT Mission Critical Platform will implement service efficiencies which drive down expense year over year within your environment, yielding significant economic gain while retaining continuity and consistency across your facilities.
Top Gun Technology provides senior level systems programmers for z/OS, z/VM, z/VSE, Linux for IBM Z, DB2, CICS, IMS DB/DC, and MQSeries. Our staff’s extensive background in providing technical support at various client levels leads to quick problem resolution, greater flexibility, and significant cost savings over Z Premiere Care.
“OEM support spending can be reduced by leveraging a blend of OEM and TPM maintenance together in a hybrid solution,” says Tenneson. “TPM contracts will offer customers an average of 60% savings off OEM support list prices.” Gartner August 2017
At Top Gun, our Mission Critical Support Platform delivers three key business benefits: (1) Improved performance (2) Increased value (3) a better personal and digital experience. Driving down costs and improving performance is not mutually exclusive. Our services drive system availability. Especially in big data environments, where storage and computing availability serve as the backbone of the business.
THE TOP GUN DIFFERENCE.
Powered by ServiceNow, Top Gun Technology provides TPM 2.0™ maintenance services that are uniquely designed to deliver the highest quality of infrastructure support for mission critical operations.

Let’s Talk Mission Critical Support
As a Top Gun client, you’ll notice a superior level of commitment and personalized support – day or night – from the most experienced technical engineering team in the industry. Proven. Trusted. Reliable