ISA99 (Industrial Automation and Control Systems Security)
East of England > Hertfordshire
The table below provides summary statistics and contractor rates for jobs advertised in Hertfordshire requiring ISA99 skills. It covers contract job vacancies from the 6 months leading up to 3 April 2026, with comparisons to the same periods in the previous two years.
| 6 months to 3 Apr 2026 |
Same period 2025 | Same period 2024 | |
|---|---|---|---|
| Rank | 69 | - | - |
| Rank change year-on-year | - | - | - |
| Contract jobs citing ISA99 | 1 | 0 | 0 |
| As % of all contract jobs in Hertfordshire | 0.12% | - | - |
| As % of the Quality Assurance & Compliance category | 0.56% | - | - |
| Number of daily rates quoted | 0 | 0 | 0 |
| Median daily rate (50th Percentile) | - | - | - |
| East of England median daily rate | - | - | - |
All Quality Assurance and Compliance Skills
Hertfordshire
ISA99 falls under the Quality Assurance and Compliance category. For comparison with the information above, the following table provides summary statistics for all contract job vacancies requiring quality assurance or compliance skills in Hertfordshire.
| Contract vacancies with a requirement for quality assurance or compliance skills | 177 | 63 | 61 |
| As % of all contract IT jobs advertised in Hertfordshire | 21.82% | 17.80% | 7.85% |
| Number of daily rates quoted | 54 | 35 | 40 |
| 10th Percentile | £413 | £383 | £198 |
| 25th Percentile | £456 | £438 | £300 |
| Median daily rate (50th Percentile) | £500 | £600 | £375 |
| Median % change year-on-year | -16.67% | +60.00% | -28.57% |
| 75th Percentile | £638 | £675 | £502 |
| 90th Percentile | £723 | £683 | £613 |
| East of England median daily rate | £510 | £550 | £450 |
| % change year-on-year | -7.27% | +22.22% | - |
| Number of hourly rates quoted | 98 | 10 | 7 |
| 10th Percentile | £16.48 | £17.58 | £14.35 |
| 25th Percentile | £18.31 | £31.64 | £14.41 |
| Median hourly rate | £18.79 | £46.82 | £15.40 |
| Median % change year-on-year | -59.88% | +204.03% | -12.00% |
| 75th Percentile | £20.34 | £73.44 | £24.00 |
| 90th Percentile | £32.79 | £75.00 | £29.30 |
| East of England median hourly rate | £18.50 | £35.00 | £15.79 |
| % change year-on-year | -47.14% | +121.66% | -9.77% |
ISA99
Contract Job Locations in Hertfordshire
The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing ISA99 within the Hertfordshire region over the 6 months to 3 April 2026. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 6 month period last year.
| Location | Rank Change on Same Period Last Year |
Matching Contract IT Job Ads |
Median Daily Rate Past 6 Months |
Median Daily Rate % Change on Same Period Last Year |
Live Jobs |
|---|---|---|---|---|---|
| Royston | - | 1 | - | - | |
| ISA99 East of England |
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ISA99
Co-Occurring Skills & Capabilities in Hertfordshire 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:
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