Period
to 21 September 2019

The following table provides summary statistics for permanent job vacancies advertised in Hertfordshire with a requirement for CentOS skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited CentOS over the 6 months to 21 September 2019 with a comparison to the same period in the previous 2 years.

CentOS Linux
East of England > Hertfordshire
6 months to
21 Sep 2019
Same period 2018 Same period 2017
Rank 107 189 185
Rank change year-on-year +82 -4 +20
Permanent jobs citing CentOS 46 15 32
As % of all permanent IT jobs advertised in Hertfordshire 1.81% 0.36% 0.78%
As % of the Operating Systems category 6.41% 1.47% 2.91%
Number of salaries quoted 10 15 21
Hertfordshire median annual salary £46,250 £35,000 £42,500
Median salary % change year-on-year +32.14% -17.65% -19.05%
10th Percentile £31,250 £23,750 £19,750
90th Percentile £51,500 £72,000 £71,250
East of England median annual salary £45,000 £42,500 £50,000
% change year-on-year +5.88% -15.00% +2.04%

CentOS is in the Operating Systems category. The following table is for comparison with the above and provides summary statistics for all permanent job vacancies advertised in Hertfordshire with a requirement for operating system skills.

All Operating Systems
Hertfordshire
Permanent vacancies with a requirement for operating system skills 718 1,023 1,098
As % of all permanent IT jobs advertised in Hertfordshire 28.23% 24.77% 26.67%
Number of salaries quoted 534 776 929
Hertfordshire median annual salary £42,500 £45,000 £42,500
Median salary % change year-on-year -5.56% +5.88% -1.73%
10th Percentile £25,000 £26,250 £23,500
90th Percentile £68,375 £71,250 £66,250
East of England median annual salary £43,250 £45,000 £42,500
% change year-on-year -3.89% +5.88% -

CentOS
Job Vacancy Trend in Hertfordshire

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

Job vacancy trend for CentOS in Hertfordshire

CentOS
Salary Trend in Hertfordshire

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

Salary trend for CentOS in Hertfordshire

CentOS
Salary Histogram in Hertfordshire

The salary distribution of IT jobs citing CentOS in Hertfordshire over the 6 months to 21 September 2019.

Salary histogram for CentOS in Hertfordshire

CentOS
Job Locations in Hertfordshire

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing CentOS within the Hertfordshire region over the 6 months to 21 September 2019. 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
Permanent
IT Job Ads
Median Salary
Past 6 Months
Median Salary
% Change
on Same Period
Last Year
Live
Job
Vacancies
Welwyn Garden City +35 14 £47,500 -34.03%
Hemel Hempstead +18 14 £47,500 +11.76% 5
Harpenden - 12 - -
Watford - 3 £32,500 -
CentOS
East of England

For the 6 months to 21 September 2019, IT jobs citing CentOS also mentioned the following skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all permanent job ads across the Hertfordshire region with a requirement for CentOS.

1 46 (100.00%) Linux
2 39 (84.78%) Python
2 39 (84.78%) Puppet
3 33 (71.74%) VMware
4 32 (69.57%) DevOps
5 23 (50.00%) Ruby
6 20 (43.48%) Ansible
6 20 (43.48%) Sonatype Nexus
7 19 (41.30%) ISO/IEC 27001
7 19 (41.30%) DNS
7 19 (41.30%) Perl
8 18 (39.13%) Opscode Chef
9 17 (36.96%) VMware Infrastructure
9 17 (36.96%) Windows
9 17 (36.96%) Red Hat
9 17 (36.96%) Debian
10 16 (34.78%) MySQL
10 16 (34.78%) HTTP
10 16 (34.78%) AWS
11 15 (32.61%) Azure
11 15 (32.61%) Bash Shell
11 15 (32.61%) Replication
11 15 (32.61%) Problem-Solving
12 14 (30.43%) Kubernetes
12 14 (30.43%) SharePoint
12 14 (30.43%) Cisco
12 14 (30.43%) Microsoft
12 14 (30.43%) vSphere
12 14 (30.43%) F5
12 14 (30.43%) Office 365

CentOS
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 14 (30.43%) SharePoint
2 12 (26.09%) nginx
3 6 (13.04%) Elasticsearch
4 3 (6.52%) OpenStack
5 2 (4.35%) Confluence
6 1 (2.17%) Apache
Applications
1 3 (6.52%) Microsoft Excel
1 3 (6.52%) Microsoft Office
1 3 (6.52%) Microsoft PowerPoint
Cloud Services
1 16 (34.78%) AWS
2 15 (32.61%) Azure
3 14 (30.43%) Office 365
4 12 (26.09%) IaaS
4 12 (26.09%) OpenShift
4 12 (26.09%) SaaS
5 11 (23.91%) GCP
5 11 (23.91%) OneDrive
6 7 (15.22%) Stackdriver
7 3 (6.52%) Dynamics 365
Communications & Networking
1 19 (41.30%) DNS
2 16 (34.78%) HTTP
3 13 (28.26%) Cisco Nexus
4 12 (26.09%) SAN
4 12 (26.09%) SMTP
4 12 (26.09%) SNMP
5 11 (23.91%) BIG-IP
5 11 (23.91%) FabricPath
5 11 (23.91%) TCP/IP
5 11 (23.91%) VLAN
6 9 (19.57%) Firewall
7 6 (13.04%) SSL
8 4 (8.70%) HTTPS
8 4 (8.70%) Wi-Fi
9 3 (6.52%) 2.5G
9 3 (6.52%) 2G
9 3 (6.52%) 3G
9 3 (6.52%) 4G
9 3 (6.52%) 5G
Database & Business Intelligence
1 16 (34.78%) MySQL
2 12 (26.09%) MariaDB
2 12 (26.09%) SQL Server
3 6 (13.04%) MongoDB
4 4 (8.70%) PostgreSQL
5 3 (6.52%) Big Data
5 3 (6.52%) FileMaker
Development Applications
1 20 (43.48%) Sonatype Nexus
2 13 (28.26%) Visual Studio Team System
3 12 (26.09%) Git (software)
4 11 (23.91%) Octopus Deploy
5 10 (21.74%) Jenkins
6 9 (19.57%) Artifactory
General
1 8 (17.39%) Finance
2 2 (4.35%) Retail
Job Titles
1 19 (41.30%) DevOps Engineer
2 15 (32.61%) Linux Engineer
3 13 (28.26%) Linux DevOps Engineer
3 13 (28.26%) Linux/Unix DevOps
4 12 (26.09%) Technical Leader
5 7 (15.22%) Senior DevOps
5 7 (15.22%) Senior DevOps Engineer
6 4 (8.70%) Administrator
6 4 (8.70%) Developer
6 4 (8.70%) Linux Administrator
6 4 (8.70%) Linux Systems Administrator
6 4 (8.70%) Python Developer
6 4 (8.70%) Systems Administrator
7 3 (6.52%) IT Support
7 3 (6.52%) IT Support Specialist
7 3 (6.52%) Senior Linux Engineer
7 3 (6.52%) Support Specialist
8 2 (4.35%) Infrastructure Engineer
8 2 (4.35%) Lead DevOps
8 2 (4.35%) Linux Infrastructure Engineer
Libraries, Frameworks & Software Standards
1 12 (26.09%) LDAP
2 11 (23.91%) Elastic Stack
3 3 (6.52%) Node.js
4 2 (4.35%) Django
5 1 (2.17%) LAMP
Miscellaneous
1 15 (32.61%) Replication
2 12 (26.09%) Analytical Skills
2 12 (26.09%) Hybrid Cloud
3 4 (8.70%) Enterprise Cloud
4 3 (6.52%) Management Information System
5 2 (4.35%) PKI
5 2 (4.35%) Self-Motivation
6 1 (2.17%) Social Media
Operating Systems
1 46 (100.00%) Linux
2 17 (36.96%) Debian
2 17 (36.96%) Windows
3 14 (30.43%) Ubuntu
4 13 (28.26%) Red Hat Enterprise Linux
4 13 (28.26%) Windows Server
4 13 (28.26%) Windows Server 2012
5 12 (26.09%) SUSE
6 1 (2.17%) Unix
Processes & Methodologies
1 32 (69.57%) DevOps
2 15 (32.61%) Problem-Solving
3 13 (28.26%) Agile Software Development
3 13 (28.26%) Continuous Integration
4 12 (26.09%) Records Management
5 11 (23.91%) Deployment Automation
5 11 (23.91%) Infrastructure as Code
6 10 (21.74%) Performance Tuning
7 9 (19.57%) Load Balancing
8 8 (17.39%) Change Control
8 8 (17.39%) Disaster Recovery
8 8 (17.39%) Service Management
8 8 (17.39%) Stakeholder Management
9 7 (15.22%) Microservices
9 7 (15.22%) Performance Measurement
10 6 (13.04%) Protective Monitoring
10 6 (13.04%) Release Automation
10 6 (13.04%) Software Engineering
11 4 (8.70%) Configuration Management
11 4 (8.70%) TDD
Programming Languages
1 39 (84.78%) Python
2 23 (50.00%) Ruby
3 19 (41.30%) Perl
4 15 (32.61%) Bash Shell
5 14 (30.43%) PowerShell
6 4 (8.70%) PHP
7 3 (6.52%) SQL
8 1 (2.17%) Shell Script
Qualifications
1 12 (26.09%) LPIC
1 12 (26.09%) RHCE
1 12 (26.09%) RHCT
2 3 (6.52%) Microsoft Certification
3 2 (4.35%) CCNA
3 2 (4.35%) Cisco Certification
4 1 (2.17%) SC Cleared
4 1 (2.17%) Security Cleared
Quality Assurance & Compliance
1 19 (41.30%) ISO/IEC 27001
2 14 (30.43%) PCI DSS
3 1 (2.17%) SLA
System Software
1 17 (36.96%) VMware Infrastructure
2 14 (30.43%) vSphere
3 13 (28.26%) Docker
3 13 (28.26%) VMware NSX
4 12 (26.09%) Active Directory
4 12 (26.09%) Hyper-V
5 11 (23.91%) KVM
Systems Management
1 39 (84.78%) Puppet
2 20 (43.48%) Ansible
3 18 (39.13%) Opscode Chef
4 14 (30.43%) Kubernetes
5 13 (28.26%) Docker Swarm
6 12 (26.09%) SCCM
6 12 (26.09%) SCOM
6 12 (26.09%) Terraform
7 11 (23.91%) Kibana
7 11 (23.91%) logstash
7 11 (23.91%) SCOrch
7 11 (23.91%) vRealize
8 7 (15.22%) Nagios
9 6 (13.04%) HAProxy
10 4 (8.70%) ZABBIX
11 2 (4.35%) Prometheus
Vendors
1 33 (71.74%) VMware
2 17 (36.96%) Red Hat
3 14 (30.43%) Cisco
3 14 (30.43%) F5
3 14 (30.43%) Microsoft
4 11 (23.91%) Google
4 11 (23.91%) New Relic
5 9 (19.57%) SolarWinds
6 5 (10.87%) Percona
7 3 (6.52%) Splunk
8 2 (4.35%) Juniper
9 1 (2.17%) Oracle