The table below provides summary statistics and salary benchmarking for jobs advertised in the City of London requiring zOS skills. It covers permanent job vacancies from the 6 months leading up to 4 November 2025, with comparisons to the same periods in the previous two years.
zOS falls under the Operating Systems category. For comparison with the information above, the following table provides summary statistics for all permanent job vacancies requiring operating system skills in the City of London.
Permanent vacancies with a requirement for operating system skills
183
498
528
As % of all permanent jobs advertised in the City of London
11.30%
18.14%
17.30%
Number of salaries quoted
156
332
470
10th Percentile
£34,125
£37,000
£31,975
25th Percentile
£40,000
£47,500
£40,000
Median annual salary (50th Percentile)
£53,500
£60,000
£60,000
Median % change year-on-year
-10.83%
-
-7.69%
75th Percentile
£80,313
£85,000
£78,750
90th Percentile
£93,125
£115,000
£92,625
Central London median annual salary
£55,000
£60,000
£60,000
% change year-on-year
-8.33%
-
-
zOS Job Vacancy Trend in the City of London
Historical trend showing the proportion of permanent IT job postings citing zOS relative to all permanent IT jobs advertised in the City of London.
zOS Salary Trend in the City of London
Salary distribution trend for jobs in the City of London citing zOS.
zOS Top 11 Co-Occurring Skills & Capabilities in the City of London
For the 6 months to 4 November 2025, job vacancies citing zOS also mentioned the following skills and capabilities in order of popularity.
The figures indicate the absolute number of co-occurrences and as a proportion of all permanent job ads across the City of London region with a requirement for zOS.
zOS Co-Occurring Skills & Capabilities in the City of London by Category
The following tables expand on the one above by listing co-occurrences grouped by category. They cover the same employment type, locality and period, with up to 20 co-occurrences shown in each category:
