Period
to 15 January 2021

The following table provides summary statistics for permanent job vacancies advertised in England 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 15 January 2021 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK > England
6 months to
15 Jan 2021
Same period 2020 Same period 2019
Rank 369 479 416
Rank change year-on-year +110 -63 -11
Permanent jobs citing CentOS 427 664 1,051
As % of all permanent jobs advertised in England 0.76% 0.57% 0.75%
As % of the Operating Systems category 3.68% 2.52% 3.19%
Number of salaries quoted 402 586 907
Median annual salary £52,500 £55,000 £55,000
Median salary % change year-on-year -4.55% - +10.00%
10th Percentile £32,500 £31,250 £31,250
90th Percentile £75,000 £80,000 £83,750
UK median annual salary £52,500 £52,500 £55,000
% change year-on-year - -4.55% +10.00%

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 England with a requirement for operating system skills.

All Operating Systems
England
Permanent vacancies with a requirement for operating system skills 11,602 26,389 32,917
As % of all permanent IT jobs advertised in England 20.59% 22.58% 23.42%
Number of salaries quoted 9,579 21,552 26,939
Median annual salary £50,000 £45,000 £47,500
Median salary % change year-on-year +11.11% -5.26% +5.56%
10th Percentile £27,500 £25,000 £25,750
90th Percentile £80,000 £80,000 £80,000
UK median annual salary £50,000 £45,000 £47,500
% change year-on-year +11.11% -5.26% +5.56%

CentOS
Job Vacancy Trend in England

Job postings citing CentOS as a proportion of all IT jobs advertised in England.

Job vacancy trend for CentOS in England

CentOS
Salary Trend in England

3-month moving average salary quoted in jobs citing CentOS in England.

Salary trend for CentOS in England

CentOS
Salary Histogram in England

Salary distribution for jobs citing CentOS in England over the 6 months to 15 January 2021.

Salary histogram for CentOS in England

CentOS
Job Locations in England

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing CentOS within the England region over the 6 months to 15 January 2021. 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
London +42 123 £65,000 +8.33% 47
South West +59 115 £49,500 -1.00% 18
South East +141 72 £48,750 -2.50% 26
North of England +103 63 £45,000 -14.29% 23
North West +84 39 £51,250 -2.38% 14
Midlands +73 32 £50,000 +11.11% 12
Yorkshire +67 24 £42,000 +21.74% 4
West Midlands +68 23 £50,000 +11.11% 9
East of England +87 16 £60,000 +33.33% 1
East Midlands +55 9 £47,500 +5.56% 3
CentOS
UK

For the 6 months to 15 January 2021, 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 England region with a requirement for CentOS.

1 426 (99.77%) Linux
2 207 (48.48%) DevOps
3 202 (47.31%) Python
4 184 (43.09%) Red Hat
5 170 (39.81%) Agile Software Development
6 166 (38.88%) AWS
7 148 (34.66%) Ansible
8 142 (33.26%) Puppet
8 142 (33.26%) Red Hat Enterprise Linux
9 131 (30.68%) VMware
10 128 (29.98%) Jenkins
11 127 (29.74%) Bash Shell
11 127 (29.74%) Git (software)
12 122 (28.57%) Windows
13 118 (27.63%) Docker
14 117 (27.40%) Ubuntu
15 116 (27.17%) Terraform
16 104 (24.36%) Configuration Management
17 99 (23.19%) VMware Infrastructure
18 93 (21.78%) Open Source
19 87 (20.37%) Azure
20 78 (18.27%) Ruby
21 75 (17.56%) Java
22 73 (17.10%) PostgreSQL
23 71 (16.63%) Kubernetes
24 69 (16.16%) Public Sector
25 67 (15.69%) JIRA
26 65 (15.22%) DNS
27 63 (14.75%) SQL
28 61 (14.29%) MySQL

CentOS
Co-occurring IT Skills in England 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 52 (12.18%) Confluence
2 50 (11.71%) Apache
3 23 (5.39%) Elasticsearch
4 19 (4.45%) nginx
5 14 (3.28%) Apache Solr
6 13 (3.04%) IIS
6 13 (3.04%) WordPress
7 8 (1.87%) Skype for Business
8 6 (1.41%) MS Exchange
8 6 (1.41%) Tomcat
9 5 (1.17%) Apache Spark
9 5 (1.17%) GeoServer
10 4 (0.94%) GlassFish
11 3 (0.70%) OpenStack
12 2 (0.47%) SharePoint
13 1 (0.23%) Ethereum
Applications
1 6 (1.41%) Microsoft Office
Business Applications
1 6 (1.41%) Dynamics NAV
2 1 (0.23%) Magento
Cloud Services
1 166 (38.88%) AWS
2 87 (20.37%) Azure
3 32 (7.49%) GCP
4 29 (6.79%) Cloud Computing
4 29 (6.79%) GitHub
5 23 (5.39%) Amazon EC2
6 13 (3.04%) Azure Active Directory
6 13 (3.04%) Virtual Private Cloud
7 12 (2.81%) OpenShift
8 11 (2.58%) Amazon EKS
8 11 (2.58%) AWS CloudFormation
8 11 (2.58%) Office 365
9 10 (2.34%) Amazon S3
9 10 (2.34%) AWS Lambda
9 10 (2.34%) SaaS
9 10 (2.34%) Serverless
10 9 (2.11%) Amazon ElastiCache
10 9 (2.11%) AWS Fargate
10 9 (2.11%) IaaS
11 7 (1.64%) Route 53
Communications & Networking
1 65 (15.22%) DNS
2 52 (12.18%) TCP/IP
3 50 (11.71%) Firewall
4 38 (8.90%) DHCP
5 34 (7.96%) HTTP
6 25 (5.85%) IPv4
7 20 (4.68%) FTP
7 20 (4.68%) VPN
8 18 (4.22%) LAN
8 18 (4.22%) WAN
9 17 (3.98%) Internet
10 16 (3.75%) SAN
11 14 (3.28%) IPv6
11 14 (3.28%) VLAN
12 13 (3.04%) IMAP
12 13 (3.04%) SMTP
13 12 (2.81%) Intrusion Detection
14 11 (2.58%) SSH
15 8 (1.87%) Network Security
15 8 (1.87%) Skype
Database & Business Intelligence
1 73 (17.10%) PostgreSQL
2 61 (14.29%) MySQL
3 43 (10.07%) SQL Server
4 31 (7.26%) Big Data
5 30 (7.03%) MongoDB
6 29 (6.79%) Redis
7 28 (6.56%) MariaDB
8 25 (5.85%) NoSQL
9 22 (5.15%) Hadoop
10 15 (3.51%) Amazon RDS
11 13 (3.04%) Apache Cassandra
12 11 (2.58%) Relational Database
13 7 (1.64%) Apache Accumulo
14 6 (1.41%) Couchbase
14 6 (1.41%) SQL Server 2005
14 6 (1.41%) SQL Server 2008
14 6 (1.41%) SQL Server 2012
15 5 (1.17%) Amazon Athena
15 5 (1.17%) CouchDB
16 4 (0.94%) RDBMS
Development Applications
1 128 (29.98%) Jenkins
2 127 (29.74%) Git (software)
3 67 (15.69%) JIRA
4 40 (9.37%) GitLab
5 31 (7.26%) Atlassian Bamboo
6 17 (3.98%) Bitbucket
7 15 (3.51%) TeamCity
8 14 (3.28%) Artifactory
8 14 (3.28%) Gerrit
9 10 (2.34%) Selenium
10 7 (1.64%) Sonatype Nexus
11 6 (1.41%) Maven
11 6 (1.41%) Octopus Deploy
11 6 (1.41%) Visual Studio Team System
12 5 (1.17%) Subversion
13 4 (0.94%) GoCD
13 4 (0.94%) JUnit
13 4 (0.94%) Travis CI
14 3 (0.70%) Chocolatey
14 3 (0.70%) Vagrant
General
1 69 (16.16%) Public Sector
2 47 (11.01%) Finance
3 33 (7.73%) Marketing
4 20 (4.68%) Telecoms
5 18 (4.22%) Electronics
5 18 (4.22%) Manufacturing
6 14 (3.28%) Legal
7 13 (3.04%) Games
8 12 (2.81%) Law
9 6 (1.41%) Publishing
10 5 (1.17%) Advertising
11 4 (0.94%) Aerospace
11 4 (0.94%) Banking
12 1 (0.23%) Front Office
12 1 (0.23%) Military
12 1 (0.23%) Retail
Job Titles
1 135 (31.62%) DevOps Engineer
2 118 (27.63%) Linux Engineer
3 53 (12.41%) Systems Administrator
4 51 (11.94%) Developer
5 42 (9.84%) Administrator
5 42 (9.84%) Senior DevOps
6 36 (8.43%) Platform Engineer
6 36 (8.43%) Senior DevOps Engineer
7 34 (7.96%) Infrastructure Engineer
8 33 (7.73%) Linux/Unix DevOps
9 32 (7.49%) Linux DevOps Engineer
9 32 (7.49%) Linux Systems Engineer
9 32 (7.49%) Systems Engineer
10 31 (7.26%) Linux Systems Administrator
11 21 (4.92%) PHP Developer
12 20 (4.68%) Senior Linux Engineer
12 20 (4.68%) Software Engineer
13 18 (4.22%) Linux Administrator
14 17 (3.98%) AWS Engineer
14 17 (3.98%) Linux Infrastructure Engineer
Libraries, Frameworks & Software Standards
1 52 (12.18%) Elastic Stack
2 38 (8.90%) Web Services
3 37 (8.67%) HTML
4 29 (6.79%) LAMP
5 28 (6.56%) CSS
6 25 (5.85%) Kafka
7 21 (4.92%) Apache NiFi
8 20 (4.68%) LEMP Stack
9 19 (4.45%) LDAP
9 19 (4.45%) RESTful
9 19 (4.45%) XML
10 18 (4.22%) YAML
11 16 (3.75%) .NET
11 16 (3.75%) jQuery
11 16 (3.75%) Node.js
12 15 (3.51%) REST
13 14 (3.28%) LAPP Stack
14 13 (3.04%) JSON
15 12 (2.81%) Django
15 12 (2.81%) Middleware
Miscellaneous
1 29 (6.79%) Data Centre
2 18 (4.22%) Linux Command Line
2 18 (4.22%) Public Cloud
3 13 (3.04%) Cyberattack
4 10 (2.34%) Greenfield Project
5 8 (1.87%) PKI
6 7 (1.64%) Clustering
7 6 (1.41%) Xbox
8 5 (1.17%) PMI
8 5 (1.17%) Replication
8 5 (1.17%) Self-Motivation
9 4 (0.94%) Hybrid Cloud
9 4 (0.94%) Media Streaming
9 4 (0.94%) Virtual Team
10 3 (0.70%) Management Information System
11 2 (0.47%) Analytical Skills
12 1 (0.23%) Cloud Native
12 1 (0.23%) Eurex
12 1 (0.23%) Private Cloud
12 1 (0.23%) User Experience
Operating Systems
1 426 (99.77%) Linux
2 142 (33.26%) Red Hat Enterprise Linux
3 122 (28.57%) Windows
4 117 (27.40%) Ubuntu
5 46 (10.77%) Unix
6 39 (9.13%) Fedora
7 38 (8.90%) Windows Server
8 37 (8.67%) Debian
9 23 (5.39%) Windows Server 2016
10 21 (4.92%) Windows Server 2012
11 18 (4.22%) Windows Server 2008
12 13 (3.04%) Windows 7
13 12 (2.81%) Windows 10
14 10 (2.34%) Amazon Linux
15 7 (1.64%) AIX
15 7 (1.64%) Mac OS X
16 4 (0.94%) Solaris
17 3 (0.70%) FreeBSD
17 3 (0.70%) Oracle Linux
18 2 (0.47%) Mac OS
Processes & Methodologies
1 207 (48.48%) DevOps
2 170 (39.81%) Agile Software Development
3 104 (24.36%) Configuration Management
4 93 (21.78%) Open Source
5 53 (12.41%) Continuous Integration
6 49 (11.48%) Microservices
7 48 (11.24%) Infrastructure Engineering
8 44 (10.30%) Continuous Delivery
8 44 (10.30%) Scrum
8 44 (10.30%) Software Engineering
9 41 (9.60%) Infrastructure as Code
10 38 (8.90%) Problem-Solving
11 37 (8.67%) IT Strategy
12 36 (8.43%) Load Balancing
13 33 (7.73%) High Availability
14 31 (7.26%) Cybersecurity
15 29 (6.79%) Infrastructure Automation
16 28 (6.56%) Web Development
17 27 (6.32%) Machine Learning
17 27 (6.32%) Site Reliability Engineering
Programming Languages
1 202 (47.31%) Python
2 127 (29.74%) Bash Shell
3 78 (18.27%) Ruby
4 75 (17.56%) Java
5 63 (14.75%) SQL
6 59 (13.82%) Shell Script
7 46 (10.77%) PHP
8 42 (9.84%) Perl
9 41 (9.60%) PowerShell
10 40 (9.37%) JavaScript
11 34 (7.96%) C
11 34 (7.96%) Go
12 20 (4.68%) C#
13 15 (3.51%) C++
14 14 (3.28%) Groovy
15 12 (2.81%) PL/SQL
16 10 (2.34%) PHP 5
17 6 (1.41%) Bourne shell
18 4 (0.94%) Lua
19 2 (0.47%) Tcl
Qualifications
1 49 (11.48%) Security Cleared
2 35 (8.20%) SC Cleared
3 28 (6.56%) AWS Certification
4 17 (3.98%) Degree
5 8 (1.87%) DV Cleared
6 7 (1.64%) CCNA
6 7 (1.64%) Cisco Certification
6 7 (1.64%) RHCE
7 5 (1.17%) PMI Certification
8 4 (0.94%) MCSA
8 4 (0.94%) Microsoft Certification
9 3 (0.70%) Computer Science Degree
10 1 (0.23%) LPIC
10 1 (0.23%) MCP
10 1 (0.23%) MCSE
Quality Assurance & Compliance
1 15 (3.51%) QA
2 10 (2.34%) ISO/IEC 27001
2 10 (2.34%) SLA
3 4 (0.94%) ISO 9001
3 4 (0.94%) OpenSCAP
3 4 (0.94%) PCI DSS
4 2 (0.47%) GDPR
5 1 (0.23%) HMG Security Policy Framework
System Software
1 118 (27.63%) Docker
2 99 (23.19%) VMware Infrastructure
3 61 (14.29%) Active Directory
4 25 (5.85%) Hyper-V
4 25 (5.85%) vSphere
5 23 (5.39%) VMware ESXi
6 16 (3.75%) KVM
7 12 (2.81%) Xen
8 10 (2.34%) Apache ZooKeeper
9 9 (2.11%) NFS
10 8 (1.87%) Slurm Workload Manager
11 7 (1.64%) oVirt
11 7 (1.64%) Samba
11 7 (1.64%) VirtualBox
12 6 (1.41%) LXC
13 5 (1.17%) Citrix Hypervisor
13 5 (1.17%) Microsoft Virtual Server
13 5 (1.17%) Virtual Servers
14 4 (0.94%) Kamailio
14 4 (0.94%) OpenSIPS
Systems Management
1 148 (34.66%) Ansible
2 142 (33.26%) Puppet
3 116 (27.17%) Terraform
4 71 (16.63%) Kubernetes
5 34 (7.96%) Opscode Chef
6 33 (7.73%) Prometheus
7 32 (7.49%) Grafana
8 30 (7.03%) Nagios
9 28 (6.56%) Graphite
10 26 (6.09%) HAProxy
11 16 (3.75%) Icinga
12 13 (3.04%) ZABBIX
13 10 (2.34%) SCCM
14 8 (1.87%) Docker Swarm
14 8 (1.87%) Kibana
14 8 (1.87%) Red Hat Spacewalk
15 7 (1.64%) Oracle ZFS
16 6 (1.41%) Observium
17 5 (1.17%) Consul
17 5 (1.17%) Galera Cluster
Vendors
1 184 (43.09%) Red Hat
2 131 (30.68%) VMware
3 43 (10.07%) Microsoft
4 33 (7.73%) Atlassian
5 30 (7.03%) Oracle
6 25 (5.85%) Google
7 24 (5.62%) Splunk
8 18 (4.22%) Dell
8 18 (4.22%) SAP
9 13 (3.04%) ServiceNow
10 9 (2.11%) Cisco
11 7 (1.64%) HP
11 7 (1.64%) Veeam
12 6 (1.41%) EMC
12 6 (1.41%) Isilon
12 6 (1.41%) SaltStack
13 5 (1.17%) LogicMonitor
13 5 (1.17%) Sophos
14 4 (0.94%) DataCore
14 4 (0.94%) SonicWALL