ISA99 (Industrial Automation and Control Systems Security)
UK > England
The table below provides summary statistics and salary benchmarking for jobs advertised in England requiring ISA99 skills. It covers permanent job vacancies from the 6 months leading up to 20 February 2026, with comparisons to the same periods in the previous two years.
| 6 months to 20 Feb 2026 |
Same period 2025 | Same period 2024 | |
|---|---|---|---|
| Rank | - | - | 763 |
| Rank change year-on-year | - | - | +213 |
| Permanent jobs citing ISA99 | 0 | 0 | 4 |
| As % of all permanent jobs in England | - | - | 0.006% |
| As % of the Quality Assurance & Compliance category | - | - | 0.042% |
| Number of salaries quoted | 0 | 0 | 4 |
| 10th Percentile | - | - | £53,275 |
| 25th Percentile | - | - | £55,188 |
| Median annual salary (50th Percentile) | - | - | £63,750 |
| Median % change year-on-year | - | - | -17.74% |
| 75th Percentile | - | - | £72,500 |
| 90th Percentile | - | - | - |
| UK median annual salary | - | - | £60,000 |
| % change year-on-year | - | - | -22.58% |
All Quality Assurance and Compliance Skills
England
ISA99 falls under the Quality Assurance and Compliance category. For comparison with the information above, the following table provides summary statistics for all permanent job vacancies requiring quality assurance or compliance skills in England.
| Permanent vacancies with a requirement for quality assurance or compliance skills | 7,065 | 7,265 | 9,487 |
| As % of all permanent jobs advertised in England | 11.68% | 16.50% | 14.28% |
| Number of salaries quoted | 4,259 | 3,389 | 7,148 |
| 10th Percentile | £30,370 | £31,250 | £27,965 |
| 25th Percentile | £41,959 | £43,290 | £37,500 |
| Median annual salary (50th Percentile) | £60,000 | £60,000 | £55,000 |
| Median % change year-on-year | - | +9.09% | -4.35% |
| 75th Percentile | £78,800 | £78,634 | £73,750 |
| 90th Percentile | £95,000 | £95,000 | £92,500 |
| UK median annual salary | £60,000 | £60,000 | £55,000 |
| % change year-on-year | - | +9.09% | -4.35% |
ISA99
Job Vacancy Trend in England
Historical trend showing the proportion of permanent IT job postings citing ISA99 relative to all permanent IT jobs advertised in England.
ISA99
Salary Trend in England
Salary distribution trend for jobs in England citing ISA99.
