The following table provides summary statistics for permanent job vacancies advertised in Hertfordshire with a requirement for ISDN skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited ISDN over the 3 months to 28 June 2017 with a comparison to the same period in the previous 2 years.

Integrated Service Digital Network (ISDN)
East of England / Hertfordshire
3 months to
28 Jun 2017
Same period 2016 Same period 2015
Rank 129 116 168
Rank change year-on-year -13 +52  
Permanent jobs citing ISDN 13 30 7
As % of all permanent IT jobs advertised in Hertfordshire 0.63% 1.31% 0.25%
As % of the Communications & Networking category 3.37% 6.54% 0.99%
Number of salaries quoted 1 8 3
Median salary £35,000 £27,500 £29,000
Median salary % change year-on-year +27.27% -5.17%  
90% offered a salary of more than £32,500 £24,250 £27,000
10% offered a salary of more than £37,500 £67,500 £44,200
UK excluding London median salary £41,500 £38,000 £51,250
% change year-on-year +9.21% -25.85%  

ISDN is in the communications and computer networking skills category. The next table is for comparison with the above and provides summary statistics for all permanent job vacancies advertised in Hertfordshire with a requirement for communications and computer networking skills.

Communications & Computer Network Skills
Hertfordshire
Permanent job vacancies with a requirement for communications and computer networking skills 386 459 707
As % of all permanent IT job vacancies advertised in Hertfordshire 18.57% 20.08% 24.76%
Number of salaries quoted 1244 1466 1301
Median salary £50,000 £44,500 £43,000
Median salary % change year-on-year +12.35% +3.48%  
90% offered a salary of more than £25,000 £25,750 £26,250
10% offered a salary of more than £72,500 £61,250 £60,000
UK excluding London median salary £42,500 £42,500 £41,500
% change year-on-year - +2.40%  

ISDN
Job Vacancy Trend in Hertfordshire

Job postings citing ISDN as a percentage of all IT jobs advertised in Hertfordshire.

Job vacancy trend for ISDN in Hertfordshire

ISDN
Salary Trend in Hertfordshire

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing ISDN in Hertfordshire.

Salary trend for ISDN in Hertfordshire

ISDN
Job Locations in Hertfordshire

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing ISDN within the Hertfordshire region over the 3 months to 28 June 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Permanent
IT Job Ads
Median Salary
Last 3 Months
Median Salary
% Change
on Same Period
Last Year
Live
Job
Vacancies
Watford +3 13 £35,000 -
ISDN
East of England

For the 6 months to 28 June 2017, IT jobs citing ISDN also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads across the Hertfordshire region with a requirement for ISDN.

1 15 (100.00%) ITIL
1 15 (100.00%) Windows
1 15 (100.00%) Linux
1 15 (100.00%) E-Commerce
1 15 (100.00%) MS Exchange
1 15 (100.00%) LAN
1 15 (100.00%) PBX
1 15 (100.00%) VoIP
1 15 (100.00%) WAN
1 15 (100.00%) DHCP
1 15 (100.00%) VPN
1 15 (100.00%) DNS
1 15 (100.00%) Microsoft
1 15 (100.00%) Active Directory
1 15 (100.00%) Terminal Services
1 15 (100.00%) Windows Server 2003
1 15 (100.00%) MPLS
1 15 (100.00%) Firewall
1 15 (100.00%) VMware
1 15 (100.00%) Retail
1 15 (100.00%) VLAN
1 15 (100.00%) VMware Infrastructure
1 15 (100.00%) Windows Server 2008
1 15 (100.00%) Red Hat Enterprise Linux
1 15 (100.00%) PaaS
1 15 (100.00%) VMware ESXi
1 15 (100.00%) Skype for Business
1 15 (100.00%) Office 365
1 15 (100.00%) Windows Server 2012
1 15 (100.00%) Mentoring

ISDN
Co-occurring IT Skills in Hertfordshire by Category

The follow tables expand on the table above by listing co-occurrences grouped by category. The same job type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:

Application Platforms
1 15 (100.00%) MS Exchange
1 15 (100.00%) Skype for Business
Applications
1 13 (86.67%) Microsoft Office
Cloud Services
1 15 (100.00%) Office 365
1 15 (100.00%) PaaS
Communications & Networking
1 15 (100.00%) DHCP
1 15 (100.00%) DNS
1 15 (100.00%) Firewall
1 15 (100.00%) LAN
1 15 (100.00%) MPLS
1 15 (100.00%) PBX
1 15 (100.00%) Remote Desktop
1 15 (100.00%) VLAN
1 15 (100.00%) VoIP
1 15 (100.00%) VPN
1 15 (100.00%) WAN
2 13 (86.67%) Skype
3 1 (6.67%) TCP/IP
General
1 15 (100.00%) Retail
2 12 (80.00%) Games
Job Titles
1 15 (100.00%) 3rd Line Engineer
1 15 (100.00%) Office 365 Engineer
2 14 (93.33%) 3rd Line Support
2 14 (93.33%) 3rd Line Support Engineer
2 14 (93.33%) Active Directory Engineer
2 14 (93.33%) Active Directory Support
2 14 (93.33%) Active Directory Support Engineer
2 14 (93.33%) Support Engineer
3 12 (80.00%) 3rd Line Infrastructure Engineer
3 12 (80.00%) 3rd Line Infrastructure Support
3 12 (80.00%) Infrastructure Engineer
3 12 (80.00%) Infrastructure Support
3 12 (80.00%) Infrastructure Support Engineer
4 2 (13.33%) Exchange Engineer
4 2 (13.33%) Exchange Support
4 2 (13.33%) Server Engineer
4 2 (13.33%) Server Support
4 2 (13.33%) Windows Engineer
4 2 (13.33%) Windows Server Engineer
4 2 (13.33%) Windows Server Support
Miscellaneous
1 14 (93.33%) Data Centre
Operating Systems
1 15 (100.00%) Linux
1 15 (100.00%) Red Hat Enterprise Linux
1 15 (100.00%) Windows
1 15 (100.00%) Windows Server
1 15 (100.00%) Windows Server 2003
1 15 (100.00%) Windows Server 2008
1 15 (100.00%) Windows Server 2012
Processes & Methodologies
1 15 (100.00%) Coaching
1 15 (100.00%) E-Commerce
1 15 (100.00%) ITIL
1 15 (100.00%) Mentoring
2 2 (13.33%) Mathematics
Programming Languages
1 3 (20.00%) C
Qualifications
1 3 (20.00%) Degree
System Software
1 15 (100.00%) Active Directory
1 15 (100.00%) Terminal Services
1 15 (100.00%) VMware ESXi
1 15 (100.00%) VMware Infrastructure
Systems Management
1 13 (86.67%) WSUS
2 1 (6.67%) SCCM
Vendors
1 15 (100.00%) Microsoft
1 15 (100.00%) VMware
2 3 (20.00%) CheckPoint