Period
to 23 January 2022

The table below provides summary statistics for permanent job vacancies with an option to work from home (WFH) and 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 23 January 2022 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK > Work from Home
6 months to
23 Jan 2022
Same period 2021 Same period 2020
Rank 433 256 246
Rank change year-on-year -177 -10 -5
Permanent jobs citing CentOS 124 84 41
As % of all permanent jobs with a WFH option 0.43% 0.78% 0.56%
As % of the Operating Systems category 2.55% 3.54% 3.20%
Number of salaries quoted 103 77 41
10th Percentile £36,800 £32,500 £27,500
25th Percentile £46,250 £42,500 £32,500
Median annual salary (50th Percentile) £55,000 £52,500 £50,000
Median % change year-on-year +4.76% +5.00% -24.81%
75th Percentile £75,000 £65,000 £63,750
90th Percentile £83,100 £73,750 £68,750
UK median annual salary £50,000 £51,250 £52,500
% change year-on-year -2.44% -2.38% -

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 with a WFH option and a requirement for operating system skills.

All Operating Systems
Work from Home
Permanent vacancies with a requirement for operating system skills 4,869 2,370 1,281
As % of all permanent jobs with a WFH option 16.75% 21.93% 17.41%
Number of salaries quoted 3,672 2,150 1,124
10th Percentile £31,300 £33,250 £33,750
25th Percentile £40,000 £38,750 £42,250
Median annual salary (50th Percentile) £55,000 £50,000 £57,500
Median % change year-on-year +10.00% -13.04% +2.68%
75th Percentile £72,500 £65,000 £72,500
90th Percentile £85,000 £80,000 £78,750
UK median annual salary £50,000 £50,000 £45,000
% change year-on-year - +11.11% -5.26%

CentOS
Trend for Jobs with a WFH Option

Job vacancies with a work from home option citing CentOS as a proportion of all IT jobs advertised.

CentOS trend for jobs with a WFH option

CentOS
Salary Trend for Jobs with a WFH Option

3-month moving average salary quoted in job vacancies with a work from home option citing CentOS.

CentOS salary trend for jobs with a WFH option

CentOS
Salary Histogram for Jobs with a WFH Option

Salary distribution for jobs with a work from home option citing CentOS over the 6 months to 23 January 2022.

CentOS salary histogram for jobs with a WFH option

For the 6 months to 23 January 2022, CentOS job roles required the following IT skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all permanent jobs with a WFH option and a requirement for CentOS.

1 124 (100.00%) Linux
2 59 (47.58%) AWS
3 57 (45.97%) Red Hat Enterprise Linux
4 54 (43.55%) Red Hat
5 53 (42.74%) Docker
6 52 (41.94%) Python
7 47 (37.90%) Azure
8 46 (37.10%) Ansible
9 41 (33.06%) Ubuntu
10 40 (32.26%) DevOps
11 38 (30.65%) Infrastructure Engineering
12 37 (29.84%) Kubernetes
12 37 (29.84%) Jenkins
12 37 (29.84%) Windows
13 35 (28.23%) Windows Server
14 33 (26.61%) Active Directory
14 33 (26.61%) VMware
14 33 (26.61%) Puppet
15 32 (25.81%) VMware Infrastructure
16 31 (25.00%) DNS
17 30 (24.19%) Icinga
18 28 (22.58%) Agile Software Development
18 28 (22.58%) PostgreSQL
19 27 (21.77%) High Availability
20 26 (20.97%) Git (software)
20 26 (20.97%) Migration
20 26 (20.97%) Microsoft
20 26 (20.97%) DHCP
21 25 (20.16%) Continuous Integration
22 23 (18.55%) Open Source

CentOS
Co-occurring IT Skills with a WFH Option 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 18 (14.52%) Elasticsearch
2 17 (13.71%) Apache
3 14 (11.29%) SharePoint
4 7 (5.65%) nginx
4 7 (5.65%) OpenStack
4 7 (5.65%) Tomcat
4 7 (5.65%) WordPress
5 6 (4.84%) IIS
6 4 (3.23%) Apache Spark
7 2 (1.61%) Confluence
8 1 (0.81%) Apache Airflow
Applications
1 4 (3.23%) Microsoft Office
2 1 (0.81%) Weka
Business Applications
1 1 (0.81%) Remedy ITSM
Cloud Services
1 59 (47.58%) AWS
2 47 (37.90%) Azure
3 22 (17.74%) IaaS
4 20 (16.13%) Amazon EC2
4 20 (16.13%) Microsoft 365
5 18 (14.52%) GCP
6 17 (13.71%) SaaS
7 14 (11.29%) Cloud Computing
7 14 (11.29%) OneDrive
8 13 (10.48%) AWS Direct Connect
9 12 (9.68%) Serverless
10 10 (8.06%) PaaS
11 7 (5.65%) Amazon EKS
11 7 (5.65%) AWS Lambda
11 7 (5.65%) OpenShift
12 4 (3.23%) Google Workspace
13 2 (1.61%) GitHub
13 2 (1.61%) MinIO
14 1 (0.81%) AWS CloudFormation
14 1 (0.81%) Azure Active Directory
Communications & Networking
1 31 (25.00%) DNS
2 26 (20.97%) DHCP
3 22 (17.74%) Firewall
3 22 (17.74%) VPN
4 20 (16.13%) IPv6
5 15 (12.10%) Broadband
6 13 (10.48%) BGP
6 13 (10.48%) IPsec
6 13 (10.48%) SNMP
7 12 (9.68%) Network Security
8 9 (7.26%) SSL
9 8 (6.45%) OpenVPN
9 8 (6.45%) OSPF
9 8 (6.45%) SAN
9 8 (6.45%) TCP/IP
10 7 (5.65%) IPv4
10 7 (5.65%) LAN
10 7 (5.65%) WAN
11 6 (4.84%) HTTPS
11 6 (4.84%) IP Telephony
Database & Business Intelligence
1 28 (22.58%) PostgreSQL
2 18 (14.52%) MariaDB
3 16 (12.90%) MySQL
4 14 (11.29%) NoSQL
5 13 (10.48%) SQL Server
6 12 (9.68%) MongoDB
7 10 (8.06%) Redis
8 8 (6.45%) Big Data
9 7 (5.65%) Amazon DynamoDB
9 7 (5.65%) Hadoop
10 4 (3.23%) Amazon RDS
11 3 (2.42%) Apache Cassandra
11 3 (2.42%) ArangoDB
11 3 (2.42%) RDBMS
11 3 (2.42%) Relational Database
12 1 (0.81%) Amazon Redshift
12 1 (0.81%) CouchDB
12 1 (0.81%) Oracle Database
12 1 (0.81%) Pentaho
12 1 (0.81%) Scylla
Development Applications
1 37 (29.84%) Jenkins
2 26 (20.97%) Git (software)
3 11 (8.87%) GitLab
4 5 (4.03%) GoCD
5 4 (3.23%) Maven
6 3 (2.42%) Atlassian Bamboo
6 3 (2.42%) Emacs
7 2 (1.61%) Bitbucket
7 2 (1.61%) Gradle
7 2 (1.61%) JIRA
7 2 (1.61%) Travis CI
8 1 (0.81%) Subversion
General
1 10 (8.06%) Advertising
2 8 (6.45%) Telecoms
3 6 (4.84%) Finance
3 6 (4.84%) Social Skills
4 4 (3.23%) Marketing
5 2 (1.61%) Back Office
5 2 (1.61%) Banking
5 2 (1.61%) Public Sector
6 1 (0.81%) Electronics
6 1 (0.81%) Front Office
6 1 (0.81%) International Banking
6 1 (0.81%) Manufacturing
6 1 (0.81%) Retail
Job Titles
1 30 (24.19%) DevOps Engineer
1 30 (24.19%) Infrastructure Engineer
2 22 (17.74%) Linux Engineer
3 14 (11.29%) Cloud Engineer
4 13 (10.48%) Developer
5 12 (9.68%) Administrator
6 10 (8.06%) Cloud Infrastructure Engineer
7 9 (7.26%) AWS Engineer
7 9 (7.26%) Linux/Unix DevOps
7 9 (7.26%) Systems Administrator
8 8 (6.45%) AWS DevOps
8 8 (6.45%) AWS DevOps Engineer
8 8 (6.45%) Linux DevOps Engineer
9 7 (5.65%) Linux Administrator
9 7 (5.65%) Linux Scripter
9 7 (5.65%) Senior Infrastructure Engineer
9 7 (5.65%) Support Engineer
10 6 (4.84%) Linux Systems Administrator
10 6 (4.84%) PHP Developer
10 6 (4.84%) Platform Engineer
Libraries, Frameworks & Software Standards
1 10 (8.06%) Node.js
1 10 (8.06%) YAML
2 9 (7.26%) LAMP
2 9 (7.26%) LAPP Stack
3 6 (4.84%) RESTful
4 5 (4.03%) jQuery
5 4 (3.23%) Apache Flex
5 4 (3.23%) JMS
5 4 (3.23%) LEMP Stack
5 4 (3.23%) React
6 3 (2.42%) CSS
6 3 (2.42%) HTML
6 3 (2.42%) Kafka
6 3 (2.42%) Memcached
6 3 (2.42%) Sphinx
6 3 (2.42%) Zend Framework
7 2 (1.61%) Apache Cordova
7 2 (1.61%) Laravel
7 2 (1.61%) PhoneGap
7 2 (1.61%) Twitter Bootstrap
Miscellaneous
1 22 (17.74%) Data Centre
2 12 (9.68%) Cloud Native
3 9 (7.26%) Enterprise Software
4 8 (6.45%) Public Cloud
5 7 (5.65%) iPad
6 6 (4.84%) Clustering
6 6 (4.84%) Linux Command Line
7 5 (4.03%) Distributed Denial-of-Service
8 3 (2.42%) Private Cloud
9 2 (1.61%) User Experience
9 2 (1.61%) Video\Live Streaming
10 1 (0.81%) CMDB
10 1 (0.81%) Derivative
10 1 (0.81%) Eurex
10 1 (0.81%) Mobile Payment
10 1 (0.81%) Replication
10 1 (0.81%) Self-Motivation
Operating Systems
1 124 (100.00%) Linux
2 57 (45.97%) Red Hat Enterprise Linux
3 41 (33.06%) Ubuntu
4 37 (29.84%) Windows
5 35 (28.23%) Windows Server
6 18 (14.52%) Debian
7 13 (10.48%) Unix
8 10 (8.06%) Fedora
8 10 (8.06%) Windows 10
8 10 (8.06%) Windows Server 2019
9 9 (7.26%) Windows Server 2016
10 7 (5.65%) Alpine Linux
11 2 (1.61%) SUSE
12 1 (0.81%) Amazon Linux
12 1 (0.81%) CoreOS
12 1 (0.81%) Solaris
12 1 (0.81%) Windows 2000 Server
12 1 (0.81%) Windows Server 2012
12 1 (0.81%) Windows XP
Processes & Methodologies
1 40 (32.26%) DevOps
2 38 (30.65%) Infrastructure Engineering
3 28 (22.58%) Agile Software Development
4 27 (21.77%) High Availability
5 26 (20.97%) Migration
6 25 (20.16%) Continuous Integration
7 23 (18.55%) Open Source
8 22 (17.74%) Project Delivery
9 21 (16.94%) CI/CD
9 21 (16.94%) Disaster Recovery
10 17 (13.71%) Configuration Management
11 15 (12.10%) Security Patching
12 13 (10.48%) Microservices
13 12 (9.68%) Infrastructure as Code
14 11 (8.87%) Deployment Automation
15 10 (8.06%) Antivirus Management
15 10 (8.06%) IT Strategy
15 10 (8.06%) Problem-Solving
16 9 (7.26%) Site Reliability Engineering
16 9 (7.26%) Virtual Infrastructure
Programming Languages
1 52 (41.94%) Python
2 21 (16.94%) Shell Script
3 18 (14.52%) Java
4 17 (13.71%) JavaScript
5 14 (11.29%) PHP
6 12 (9.68%) Go
7 9 (7.26%) Groovy
8 8 (6.45%) PowerShell
9 7 (5.65%) Kotlin
9 7 (5.65%) Perl
9 7 (5.65%) SQL
10 6 (4.84%) C++
10 6 (4.84%) Ruby
11 5 (4.03%) Bicep
11 5 (4.03%) PHP 7
12 4 (3.23%) Bash
13 2 (1.61%) C#
Qualifications
1 8 (6.45%) AWS Certification
1 8 (6.45%) Cisco Certification
1 8 (6.45%) Degree
2 7 (5.65%) SC Cleared
2 7 (5.65%) Security Cleared
3 6 (4.84%) Microsoft Certification
4 5 (4.03%) CCNA
4 5 (4.03%) MCSA
4 5 (4.03%) RHCE
5 3 (2.42%) CCNP
6 1 (0.81%) CEH
6 1 (0.81%) CompTIA Security+
6 1 (0.81%) LPIC
Quality Assurance & Compliance
1 5 (4.03%) ISO/IEC 27001
1 5 (4.03%) PCI DSS
2 3 (2.42%) GDPR
3 2 (1.61%) SLA
4 1 (0.81%) NCSC
4 1 (0.81%) QA
4 1 (0.81%) Sarbanes-Oxley
System Software
1 53 (42.74%) Docker
2 33 (26.61%) Active Directory
3 32 (25.81%) VMware Infrastructure
4 11 (8.87%) vSphere
5 10 (8.06%) XenApp
5 10 (8.06%) XenDesktop
6 8 (6.45%) iptables
7 7 (5.65%) Virtual Machines
8 3 (2.42%) Apache ZooKeeper
8 3 (2.42%) Hyper-V
8 3 (2.42%) KVM
9 2 (1.61%) NFS
10 1 (0.81%) Virtual Servers
Systems Management
1 46 (37.10%) Ansible
2 37 (29.84%) Kubernetes
3 33 (26.61%) Puppet
4 30 (24.19%) Icinga
5 20 (16.13%) Terraform
6 16 (12.90%) Nagios
7 13 (10.48%) ZABBIX
8 9 (7.26%) Failover Clustering
8 9 (7.26%) Grafana
8 9 (7.26%) HAProxy
8 9 (7.26%) Opscode Chef
9 5 (4.03%) Salt
10 4 (3.23%) Prometheus
11 2 (1.61%) Consul
11 2 (1.61%) Packer
12 1 (0.81%) Control-M
12 1 (0.81%) Docker Swarm
12 1 (0.81%) Graphite
Vendors
1 54 (43.55%) Red Hat
2 33 (26.61%) VMware
3 26 (20.97%) Microsoft
4 15 (12.10%) Cisco
5 12 (9.68%) F5
5 12 (9.68%) Google
6 9 (7.26%) New Relic
7 7 (5.65%) Huawei
7 7 (5.65%) Nokia
7 7 (5.65%) SolarWinds
8 6 (4.84%) Avaya
8 6 (4.84%) Brocade
8 6 (4.84%) Citrix
9 4 (3.23%) SaltStack
10 3 (2.42%) Zend
11 2 (1.61%) Atlassian
11 2 (1.61%) BMC
11 2 (1.61%) Hitachi
11 2 (1.61%) Oracle
11 2 (1.61%) Splunk