IBM z/OS
County Antrim > Belfast
The table below provides summary statistics and salary benchmarking for jobs advertised in Belfast requiring zOS skills. It covers permanent job vacancies from the 6 months leading up to 2 November 2025, with comparisons to the same periods in the previous two years.
| 6 months to 2 Nov 2025 |
Same period 2024 | Same period 2023 | |
|---|---|---|---|
| Rank | 35 | - | - |
| Rank change year-on-year | - | - | - |
| Permanent jobs citing zOS | 1 | 0 | 0 |
| As % of all permanent jobs in Belfast | 0.38% | - | - |
| As % of the Operating Systems category | 5.56% | - | - |
| Number of salaries quoted | 0 | 0 | 0 |
| Median annual salary (50th Percentile) | - | - | - |
| County Antrim median annual salary | - | - | - |
All Operating Systems
Belfast
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 Belfast.
| Permanent vacancies with a requirement for operating system skills | 18 | 46 | 43 |
| As % of all permanent jobs advertised in Belfast | 6.84% | 11.83% | 15.03% |
| Number of salaries quoted | 14 | 25 | 38 |
| 10th Percentile | £31,088 | £38,000 | £32,125 |
| 25th Percentile | £32,081 | £51,250 | £36,250 |
| Median annual salary (50th Percentile) | £37,500 | £55,000 | £44,250 |
| Median % change year-on-year | -31.82% | +24.29% | -11.50% |
| 75th Percentile | £38,750 | £74,144 | £68,288 |
| 90th Percentile | £72,403 | £95,000 | £89,500 |
| County Antrim median annual salary | £37,500 | £55,000 | £40,500 |
| % change year-on-year | -31.82% | +35.80% | -14.74% |
zOS
Job Vacancy Trend in Belfast
Historical trend showing the proportion of permanent IT job postings citing zOS relative to all permanent IT jobs advertised in Belfast.
zOS
Salary Trend in Belfast
Salary distribution trend for jobs in Belfast citing zOS.
zOS
Co-Occurring Skills & Capabilities in Belfast 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: