Period
to

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 9 August 2022 with a comparison to the same period in the previous 2 years.

CentOS Linux
UK > Work from Home
6 months to
9 Aug 2022
Same period 2021 Same period 2020
Rank 577 477 259
Rank change year-on-year -100 -218 +38
Permanent jobs citing CentOS 314 170 46
As % of all permanent jobs with a WFH option 0.41% 0.42% 0.52%
As % of the Operating Systems category 2.31% 2.34% 2.49%
Number of salaries quoted 189 151 42
10th Percentile £32,500 £38,250 £33,000
25th Percentile £42,500 £43,125 £43,750
Median annual salary (50th Percentile) £50,000 £55,000 £52,500
Median % change year-on-year -9.09% +4.76% -19.23%
75th Percentile £65,000 £68,750 £62,500
90th Percentile £80,000 £77,500 £68,500
UK median annual salary £52,500 £55,000 £51,593
% change year-on-year -4.55% +6.60% +6.38%

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 13,608 7,279 1,851
As % of all permanent jobs with a WFH option 17.72% 17.96% 21.00%
Number of salaries quoted 7,571 5,740 1,612
10th Percentile £30,932 £31,250 £31,250
25th Percentile £41,250 £38,750 £41,250
Median annual salary (50th Percentile) £55,000 £52,500 £53,500
Median % change year-on-year +4.76% -1.87% -6.96%
75th Percentile £73,750 £67,500 £68,750
90th Percentile £87,500 £82,500 £80,000
UK median annual salary £52,500 £50,000 £50,000
% change year-on-year +5.00% - +8.70%

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 9 August 2022.

CentOS salary histogram for jobs with a WFH option

For the 6 months to 9 August 2022, CentOS job roles required the following 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.

1 314 (100.00%) Linux
2 186 (59.24%) Python
3 159 (50.64%) Red Hat
3 159 (50.64%) AWS
4 150 (47.77%) Docker
5 139 (44.27%) Bash
6 133 (42.36%) DevOps
7 130 (41.40%) VMware
8 128 (40.76%) Ansible
9 115 (36.62%) Finance
10 102 (32.48%) VMware Infrastructure
11 95 (30.25%) Social Skills
12 92 (29.30%) Configuration Management
13 91 (28.98%) Azure
14 89 (28.34%) MySQL
15 88 (28.03%) Kubernetes
16 87 (27.71%) Jenkins
17 85 (27.07%) Windows
18 81 (25.80%) Puppet
19 75 (23.89%) Ubuntu
19 75 (23.89%) Problem-Solving
20 73 (23.25%) Firewall
21 68 (21.66%) Terraform
22 66 (21.02%) Git (software)
23 64 (20.38%) Active Directory
24 62 (19.75%) DNS
25 61 (19.43%) Infrastructure as Code
26 60 (19.11%) Infrastructure Engineering
27 59 (18.79%) Apache
28 58 (18.47%) Agile

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 59 (18.79%) Apache
2 32 (10.19%) Apache Spark
3 29 (9.24%) Tomcat
4 20 (6.37%) OpenStack
5 18 (5.73%) MS Exchange
6 17 (5.41%) nginx
7 15 (4.78%) IIS
8 13 (4.14%) Ethereum
8 13 (4.14%) Jupyter
9 7 (2.23%) Exchange Server 2013
9 7 (2.23%) SharePoint
10 4 (1.27%) Exchange Server 2010
11 2 (0.64%) Confluence
12 1 (0.32%) Traefik
Applications
1 16 (5.10%) Microsoft Office
2 13 (4.14%) Microsoft Excel
2 13 (4.14%) Microsoft PowerPoint
2 13 (4.14%) MS Visio
Business Applications
1 13 (4.14%) Ripple
1 13 (4.14%) Ripple XRP
Cloud Services
1 159 (50.64%) AWS
2 91 (28.98%) Azure
3 27 (8.60%) Cloud Computing
4 26 (8.28%) Amazon EC2
4 26 (8.28%) GitHub
5 23 (7.32%) OpenShift
6 16 (5.10%) AWS CloudFormation
6 16 (5.10%) GCP
7 14 (4.46%) Microsoft 365
7 14 (4.46%) Virtual Private Cloud
8 12 (3.82%) Amazon S3
8 12 (3.82%) Route 53
9 11 (3.50%) Azure Active Directory
10 7 (2.23%) npm
11 6 (1.91%) PaaS
11 6 (1.91%) SaaS
12 5 (1.59%) Amazon CloudWatch
12 5 (1.59%) Azure DevOps
12 5 (1.59%) Datadog
12 5 (1.59%) Stackdriver
Communications & Networking
1 73 (23.25%) Firewall
2 62 (19.75%) DNS
3 44 (14.01%) DHCP
4 37 (11.78%) VPN
5 23 (7.32%) TCP/IP
6 22 (7.01%) SAN
7 14 (4.46%) HTTP
8 13 (4.14%) VLAN
9 12 (3.82%) FIX Connectivity
10 8 (2.55%) Ethernet
11 7 (2.23%) DSL
11 7 (2.23%) LAN
11 7 (2.23%) Network Security
11 7 (2.23%) WAN
12 6 (1.91%) Fibre Channel
13 5 (1.59%) IPsec
13 5 (1.59%) NetScaler
14 4 (1.27%) MPLS
14 4 (1.27%) SSL
14 4 (1.27%) Wireless
Database & Business Intelligence
1 89 (28.34%) MySQL
2 39 (12.42%) PostgreSQL
3 36 (11.46%) Hadoop
4 24 (7.64%) InfluxDB
5 23 (7.32%) Big Data
6 21 (6.69%) SQL Server
7 19 (6.05%) Elasticsearch
8 13 (4.14%) MariaDB
8 13 (4.14%) Parquet
9 12 (3.82%) Amazon RDS
10 8 (2.55%) NoSQL
11 6 (1.91%) Apache Cassandra
12 5 (1.59%) MongoDB
13 4 (1.27%) ArangoDB
13 4 (1.27%) DB2
13 4 (1.27%) Flink
13 4 (1.27%) Oracle Database
13 4 (1.27%) Oracle Database 10g
13 4 (1.27%) Oracle Database 11g
13 4 (1.27%) Oracle Database 12c
Development Applications
1 87 (27.71%) Jenkins
2 66 (21.02%) Git (software)
3 20 (6.37%) JUnit
3 20 (6.37%) Selenium
4 19 (6.05%) IntelliJ
5 18 (5.73%) Subversion
6 15 (4.78%) GitLab
7 14 (4.46%) JIRA
8 13 (4.14%) Mockito
9 7 (2.23%) Chocolatey
10 6 (1.91%) Atlassian Bamboo
10 6 (1.91%) TeamCity
11 5 (1.59%) Bitbucket Server
11 5 (1.59%) Maven
11 5 (1.59%) Octopus Deploy
11 5 (1.59%) Team Foundation Server
12 4 (1.27%) Bitbucket
12 4 (1.27%) CircleCI
12 4 (1.27%) Gradle
12 4 (1.27%) Travis CI
General
1 115 (36.62%) Finance
2 95 (30.25%) Social Skills
3 53 (16.88%) Telecoms
4 49 (15.61%) Analytical Skills
5 48 (15.29%) Inclusion and Diversity
6 34 (10.83%) Advertising
7 28 (8.92%) Marketing
8 25 (7.96%) Law
8 25 (7.96%) Public Sector
9 23 (7.32%) Games
10 20 (6.37%) Electronics
10 20 (6.37%) Manufacturing
11 11 (3.50%) Financial Institution
12 5 (1.59%) Legal
12 5 (1.59%) Presentation Skills
13 2 (0.64%) Retail
14 1 (0.32%) Banking
14 1 (0.32%) Documentation Skills
14 1 (0.32%) Front Office
14 1 (0.32%) Investment Banking
Job Titles
1 81 (25.80%) DevOps Engineer
2 47 (14.97%) Infrastructure Engineer
3 36 (11.46%) Linux Engineer
4 35 (11.15%) Systems Administrator
5 30 (9.55%) Administrator
6 27 (8.60%) Analyst
7 26 (8.28%) Developer
8 24 (7.64%) Senior Infrastructure Engineer
9 22 (7.01%) Linux Infrastructure Engineer
10 21 (6.69%) Systems Engineer
11 20 (6.37%) Senior Unix Administrator
11 20 (6.37%) Unix Administrator
12 19 (6.05%) Senior Linux Engineer
13 17 (5.41%) Senior Systems Administrator
13 17 (5.41%) Senior Unix Systems Administrator
13 17 (5.41%) Software Engineer
13 17 (5.41%) Unix Systems Administrator
14 16 (5.10%) C++ Software Engineer
14 16 (5.10%) Junior
14 16 (5.10%) Support Analyst
Libraries, Frameworks & Software Standards
1 42 (13.38%) Elastic Stack
2 27 (8.60%) Vue.js
3 22 (7.01%) Kafka
4 19 (6.05%) JMS
5 17 (5.41%) REST
6 16 (5.10%) FIX Protocol
6 16 (5.10%) LAMP
7 12 (3.82%) WebSockets
8 11 (3.50%) LEMP Stack
9 9 (2.87%) CSS
9 9 (2.87%) HTML
9 9 (2.87%) Laravel
9 9 (2.87%) RabbitMQ
10 8 (2.55%) CSS3
10 8 (2.55%) HTML5
10 8 (2.55%) Sass
10 8 (2.55%) Symfony
11 7 (2.23%) .NET
12 6 (1.91%) React
13 5 (1.59%) LAPP Stack
Miscellaneous
1 42 (13.38%) Cyber Defence
2 37 (11.78%) Linux Command Line
3 34 (10.83%) Cyberattack
4 28 (8.92%) Replication
5 27 (8.60%) Foreign Exchange (FX)
6 26 (8.28%) Data Centre
7 25 (7.96%) Blockchain
8 18 (5.73%) Social Media
9 16 (5.10%) Management Information System
9 16 (5.10%) Smartphone
10 13 (4.14%) Bitcoin
10 13 (4.14%) Derivative
10 13 (4.14%) Litecoin
10 13 (4.14%) Self-Motivation
11 12 (3.82%) Client/Server
11 12 (3.82%) Equities
11 12 (3.82%) Fixed Income
11 12 (3.82%) Low-Code
11 12 (3.82%) OTC Derivatives
12 9 (2.87%) Cybercrime
Operating Systems
1 314 (100.00%) Linux
2 85 (27.07%) Windows
3 75 (23.89%) Ubuntu
4 54 (17.20%) Windows Server
5 43 (13.69%) Red Hat Enterprise Linux
6 36 (11.46%) Debian
7 32 (10.19%) Unix
8 27 (8.60%) Amazon Linux
9 26 (8.28%) Windows Server 2016
10 23 (7.32%) Windows Server 2012
11 10 (3.18%) Windows 10
12 9 (2.87%) Windows Server 2008
13 8 (2.55%) Scientific Linux
13 8 (2.55%) Windows 7
14 7 (2.23%) VMS
15 6 (1.91%) SUSE
15 6 (1.91%) Windows Server 2019
16 4 (1.27%) Solaris
17 2 (0.64%) openSUSE
17 2 (0.64%) SUSE Linux Enterprise Server
Processes & Methodologies
1 133 (42.36%) DevOps
2 92 (29.30%) Configuration Management
3 75 (23.89%) Problem-Solving
4 61 (19.43%) Infrastructure as Code
5 60 (19.11%) Infrastructure Engineering
6 58 (18.47%) Agile
7 47 (14.97%) Containerisation
8 43 (13.69%) ITIL
9 42 (13.38%) Continuous Integration
9 42 (13.38%) Project Delivery
10 38 (12.10%) Analytics
11 34 (10.83%) Cyber Threat Intelligence
11 34 (10.83%) Load Balancing
11 34 (10.83%) Threat Intelligence
12 32 (10.19%) CI/CD
13 31 (9.87%) Disaster Recovery
13 31 (9.87%) Migration
14 28 (8.92%) Performance Monitoring
15 26 (8.28%) Cybersecurity
16 25 (7.96%) Business Continuity
Programming Languages
1 186 (59.24%) Python
2 139 (44.27%) Bash
3 57 (18.15%) PowerShell
4 54 (17.20%) JavaScript
5 53 (16.88%) Java
6 36 (11.46%) SQL
7 26 (8.28%) Perl
8 17 (5.41%) C++
8 17 (5.41%) PHP
9 16 (5.10%) C
10 12 (3.82%) Groovy
10 12 (3.82%) Ruby
11 11 (3.50%) Kotlin
12 10 (3.18%) Go
13 8 (2.55%) ES6
14 6 (1.91%) Shell Script
15 4 (1.27%) PL/SQL
16 3 (0.96%) AWK
16 3 (0.96%) Bourne shell
16 3 (0.96%) Korn
Qualifications
1 38 (12.10%) Security Cleared
2 27 (8.60%) RHCE
3 26 (8.28%) SC Cleared
4 18 (5.73%) Degree
5 16 (5.10%) CCA
5 16 (5.10%) Cisco Certification
6 15 (4.78%) CCNA
6 15 (4.78%) MCSE
6 15 (4.78%) Microsoft Certification
7 12 (3.82%) AWS Certification
8 7 (2.23%) MCSA
8 7 (2.23%) VMware Certified Professional (VCP)
9 6 (1.91%) CCDA
9 6 (1.91%) Computer Science Degree
10 4 (1.27%) LPIC
11 3 (0.96%) CCNP
11 3 (0.96%) MySQL Certification
12 1 (0.32%) Linux+ Certification
12 1 (0.32%) RHCSA
Quality Assurance & Compliance
1 30 (9.55%) QA
2 9 (2.87%) ISO/IEC 27001
3 6 (1.91%) PCI DSS
4 4 (1.27%) SLA
5 3 (0.96%) GDPR
6 1 (0.32%) HIPAA
System Software
1 150 (47.77%) Docker
2 102 (32.48%) VMware Infrastructure
3 64 (20.38%) Active Directory
4 48 (15.29%) vSphere
5 16 (5.10%) GlusterFS
6 8 (2.55%) Citrix Hypervisor
6 8 (2.55%) Lustre
6 8 (2.55%) Slurm Workload Manager
7 7 (2.23%) Apache ZooKeeper
7 7 (2.23%) Hyper-V
7 7 (2.23%) Virtual Machines
7 7 (2.23%) VMware ESXi
8 6 (1.91%) iptables
9 5 (1.59%) KVM
10 3 (0.96%) BitLocker
10 3 (0.96%) etcd
10 3 (0.96%) Terminal Services
10 3 (0.96%) VMware NSX
10 3 (0.96%) XenApp
10 3 (0.96%) XenDesktop
Systems Management
1 128 (40.76%) Ansible
2 88 (28.03%) Kubernetes
3 81 (25.80%) Puppet
4 68 (21.66%) Terraform
5 34 (10.83%) Opscode Chef
6 27 (8.60%) Grafana
7 22 (7.01%) Prometheus
8 15 (4.78%) Nagios
8 15 (4.78%) vCenter Server
9 14 (4.46%) ZABBIX
10 13 (4.14%) HAProxy
10 13 (4.14%) Packer
11 12 (3.82%) Kibana
12 10 (3.18%) yum
13 9 (2.87%) Docker Swarm
14 7 (2.23%) Nessus
15 6 (1.91%) Graphite
15 6 (1.91%) SCCM
15 6 (1.91%) SCOM
16 5 (1.59%) Failover Clustering
Vendors
1 159 (50.64%) Red Hat
2 130 (41.40%) VMware
3 45 (14.33%) Microsoft
4 26 (8.28%) F5
5 25 (7.96%) Cisco
6 20 (6.37%) SAP
7 17 (5.41%) Splunk
8 16 (5.10%) Perforce
9 15 (4.78%) Citrix
9 15 (4.78%) Juniper
10 12 (3.82%) Google
10 12 (3.82%) Oracle
11 11 (3.50%) Veeam
12 10 (3.18%) HP
12 10 (3.18%) SaltStack
13 8 (2.55%) Dynatrace
13 8 (2.55%) ServiceNow
14 7 (2.23%) Sun
15 6 (1.91%) Brocade
16 5 (1.59%) IBM