Mainframes are high-performance computers essential for large-scale computing, hosting commercial databases, and processing significant business data. They constitute 68% of the world's production workload and are widely used by major banks, airlines, and insurance companies. Career opportunities in mainframe technology require motivation and IT interest, with roles ranging from system administration to security and performance management.

1. MainframeCareer Guide

2. What is mainframe?
- Mainframe is a high-performance
computer used for large-scale computing
- Companies use Mainframe to host
commercial databases, transaction servers
and applications
- Mainframes are complex and very, very
powerful
1
Check out this short video:
https://ibm.biz/mainframe-video-introduction

3. Did you know?
- 80 % of all business data in the world
are stored on mainframe
- Mainframe 99.999% availability
represent 5 min outage per year
- Mainframe run 68% of the world’s
production workload capacity but at only
6.2% of total server spend
- roughly 30 billion transactions
per day are processed by mainframe
2

4. Who uses mainframe?
- 92 of 100 biggest banks
- 23 of 25 biggest airlines
- 10 of 10 biggest insurance companies
3

5. How can you get a job?
What we expect:
- show your interest in IT & mainframe area
- be highly motivated, detail oriented and able to
work under pressure
Advantage:
- experience in Linux / UNIX OS
- good general IT knowledge
- basic programming skills
4

6. Future of mainframes
5
Further grow of existing essential business (finance, airline, retailer..)
No other platform can offer resiliency and performance like mainframe
Security
Most secured business platform. Only commercial system with highest EAL5+ security rating
Mobile economy
Mobile transaction & mobile application integration to mainframe through API

7. Future of mainframes
5
LinuxONE (Linux without limits)
Unleash full potential of Linux for business (8000 virtual machines / millions of users / 30 billion of web
interactions)
Data analytics & Cognitive business
Why not run analytics exactly where your data resides? In a Real time! Integrates transaction and analytics in
one system
CLOUD services
Dynamically set resources and host private and public cloud for best price & security.

8. What role can you take?
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Maintain operating system of most performant business machine as Mainframe
System Administrator
#InstallCurrentVersion #zOSv2.2 #APAR #PTF
Watch over critical transactions and databases as Mainframe DBDC system
specialist
#TransactionNotLooping #DBsUP #transaction #DB2 #IMS #IDMS
Solve complex batch processing as Mainframe Production Control Specialist
#HaveNoFailedJob #jobrestart #application

9. What role can you take?
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Supervise storage components as Mainframe Storage Specialist
#HaveEnoughSpace #disk #VTS #tape #DFHSM #DASD #TS7700 #DFRMM
Set and maintain security tools & policies of most secure business machine as
Mainframe Security Specialist
#ProperAccess #ILoveAudits #privileges #access #policy
Adjust and plan performance as Mainframe performance and Capacity
Specialist
#HaveEnoughPerfomance #MIPS #SoftCapping #HardCapping
Maintain Monitoring tool as Mainframe System Automatin Administrator
#ProperMonitoring #Netview #ATM #AOC #REXX #ALERTS

10. Ready to start
your career with
Mainframe?
Apply: ibm.biz/start-career-mainframe7

11. Take a
deeper look
Technical Guide
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12. Design & client stories
Mainframe Design Film (~15min):
https://www.youtube.com/watch?v=ErZRSQoTFXw
Walmart (~3 min):
https://www.youtube.com/watch?v=3C4PJ2bJbRk
Tesco (~3 min):
https://www.youtube.com/watch?v=DKv9P37NIjI
RADIXX CEO story (~8 min):
https://www.youtube.com/watch?v=ylBy6aNTqhQ

13. Evolution
1964 1970 1980 1990 2000 2004
S/360 S/370 S/370XA – 31 bits ESA/390 z/Architecture – 64 bits
MVT, PCP
MFT
MVS - VTAM
VM
MVS/XA
MVS/ESA
OS/390
z/OS
DB2
z/VM
Linux
CICS
HW
SW
USS -
TCP/IP
WebSphere
CMOS –
Parallel Sysplex
Go through the presentation below, you will get a better picture how
mainframes are evolving and how they used to look:
https://ibm.biz/mainframe-evolution

14. Take a look inside

15. Mainframe CPU

16. zSeries CPU
- z13 chip is a 5.2 GHz 22nm hexa-
octa core CISC (complex instruction
set computer) based zArchitecture
processor
- z13 can have a maximum of 141
cores, 120 of which are customer
configurable to run operating systems
and applications as well

17. Mainframe LPARs
- One mainframe CPC typically runs several
servers and operating systems for several
customers

18. Batch processing
Disk Storage
databases
Tape Storage
Sequential
data sets
Partners
and clients
exchange
information
Reports
Backups
Data
update
Reports
Statistics,
summaries,
exceptions
Residence
Main
office
Branch offices
Account balances
bills, etc
Processing
reports
Mainframe
Processing batch jobs
44
55
Reports
22
1010
11
88
66
33
CREDIT CARD
1234 5678 90121234 5678 9012
VALID FROM GOOD THRU
XX/XX/XX XX/XX/XX
PAUL FISCHER
XX/XX/XX XX/XX/XX
PAUL FISCHER
77
99
System
Operator
Production
Control

19. Online processing
Disk
storage
controller
Stores
database
files
queries
and
updates
Account
activities
Office
automation
systems
Mainframe
Accesses
database
Requests
ATMs
Branch
offices
Business analysts Inventory control
Branch office
automation
systems
SNA or TCP/IP
network
55
66
33
22
44
11
Central office

20. Server interconnection
317x
Cluster
controller
Host processor
z/OS
CICS
VTAM
PC
pSeries
AIX
iSeries
OS/400
zSeries
zSeries
z/VM
WindowsWindows
Communication
controller (37xx)
Workstations
NCP