The table below provides summary statistics for contract job vacancies advertised in the City of London requiring zOS skills. It includes a benchmarking guide to the contractor rates offered in vacancies that cited zOS over the 6 months leading up to 3 May 2025, comparing them to the same period in the previous two years.
6 months to 3 May 2025
Same period 2024
Same period 2023
Rank
120
123
173
Rank change year-on-year
+3
+50
+22
Contract jobs citing zOS
3
4
3
As % of all contract jobs advertised in the City of London
zOS falls under the Operating Systems category. For comparison with the information above, the following table provides summary statistics for all contract job vacancies requiring operating system skills in the City of London.
Contract vacancies with a requirement for operating system skills
238
282
506
As % of all contract IT jobs advertised in the City of London
13.55%
12.86%
13.88%
Number of daily rates quoted
174
199
362
10th Percentile
£259
£193
£160
25th Percentile
£363
£313
£266
Median daily rate (50th Percentile)
£518
£500
£538
Median % change year-on-year
+3.50%
-6.98%
+2.38%
75th Percentile
£663
£663
£663
90th Percentile
£711
£728
£737
Central London median daily rate
£513
£450
£523
% change year-on-year
+13.89%
-13.88%
+4.50%
Number of hourly rates quoted
1
3
3
10th Percentile
-
-
-
25th Percentile
£162.50
£21.25
-
Median hourly rate
£175.00
£22.50
£35.00
Median % change year-on-year
+677.78%
-35.71%
+42.86%
75th Percentile
£187.50
£25.38
£59.38
90th Percentile
-
£26.35
£74.00
Central London median hourly rate
£98.75
£22.50
£35.00
% change year-on-year
+338.89%
-35.71%
+42.86%
zOS Job Vacancy Trend in the City of London
Job postings citing zOS as a proportion of all IT jobs advertised in the City of London.
zOS Contractor Daily Rate Trend in the City of London
3-month moving average daily rate quoted in jobs citing zOS in the City of London.
zOS Contractor Hourly Rate Trend in the City of London
3-month moving average hourly rates quoted in jobs citing zOS in the City of London.
zOS Top 15 Co-occurring Skills and Capabilities in the City of London
For the 6 months to 3 May 2025, contractor job vacancies citing zOS also mentioned the following skills and capabilities in order of popularity.
The figures indicate the absolute number co-occurrences and as a proportion of all contract job ads across the City of London region with a requirement for zOS.
zOS Co-occurring Skills and Capabilities in the City of London by Category
The follow tables expand on the table above by listing co-occurrences grouped by category.
The same employment type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:
