Period
to 24 September 2021

The following table provides summary statistics for permanent job vacancies advertised in London 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 24 September 2021 with a comparison to the same period in the previous 2 years.

CentOS Linux
England > London
6 months to
24 Sep 2021
Same period 2020 Same period 2019
Rank 563 358 483
Rank change year-on-year -205 +125 -77
Permanent jobs citing CentOS 158 123 278
As % of all permanent jobs advertised in London 0.32% 0.61% 0.50%
As % of the Operating Systems category 2.06% 3.15% 2.29%
Number of salaries quoted 133 96 230
10th Percentile £50,000 £42,500 £37,500
25th Percentile £57,500 £60,000 £47,500
Median annual salary (50th Percentile) £70,000 £70,000 £60,000
Median % change year-on-year - +16.67% -
75th Percentile £87,500 £75,000 £78,750
90th Percentile £95,000 £94,375 £105,000
England median annual salary £56,250 £51,421 £50,000
% change year-on-year +9.39% +2.84% -9.09%

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 London with a requirement for operating system skills.

All Operating Systems
London
Permanent vacancies with a requirement for operating system skills 7,684 3,909 12,138
As % of all permanent IT jobs advertised in London 15.62% 19.34% 21.72%
Number of salaries quoted 5,273 3,298 10,097
10th Percentile £33,750 £36,250 £29,000
25th Percentile £46,250 £47,500 £39,750
Median annual salary (50th Percentile) £65,000 £65,000 £60,000
Median % change year-on-year - +8.33% +4.35%
75th Percentile £85,000 £77,500 £77,500
90th Percentile £98,750 £95,000 £92,500
England median annual salary £50,000 £50,000 £47,500
% change year-on-year - +5.26% -

CentOS
Job Vacancy Trend in London

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

Job vacancy trend for CentOS in London

CentOS
Salary Trend in London

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

Salary trend for CentOS in London

CentOS
Salary Histogram in London

Salary distribution for jobs citing CentOS in London over the 6 months to 24 September 2021.

Salary histogram for CentOS in London

CentOS
Job Locations in London

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing CentOS within the London region over the 6 months to 24 September 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
Central London -47 23 £87,500 +25.00% 12
South London -22 4 £40,000 -33.33% 2
West London - 2 £50,000 - 1
East London -20 1 £90,000 +50.00% 7
CentOS
England

For the 6 months to 24 September 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 London region with a requirement for CentOS.

1 158 (100.00%) Linux
2 89 (56.33%) Python
3 76 (48.10%) AWS
4 73 (46.20%) Ansible
4 73 (46.20%) Red Hat
5 70 (44.30%) DevOps
6 64 (40.51%) Bash Shell
7 55 (34.81%) Finance
8 53 (33.54%) Windows
8 53 (33.54%) Puppet
9 52 (32.91%) DNS
10 47 (29.75%) Ubuntu
11 46 (29.11%) Terraform
12 45 (28.48%) Azure
13 41 (25.95%) Firewall
13 41 (25.95%) VMware
13 41 (25.95%) Active Directory
13 41 (25.95%) Unix
13 41 (25.95%) Configuration Management
14 40 (25.32%) Docker
15 39 (24.68%) Red Hat Enterprise Linux
15 39 (24.68%) Cisco
16 37 (23.42%) Data Centre
17 36 (22.78%) Kubernetes
17 36 (22.78%) SQL
17 36 (22.78%) PowerShell
18 35 (22.15%) PostgreSQL
18 35 (22.15%) Jenkins
19 34 (21.52%) Perl
20 32 (20.25%) VPN

CentOS
Co-occurring IT Skills in London 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 30 (18.99%) Apache
2 21 (13.29%) Elasticsearch
3 17 (10.76%) nginx
4 12 (7.59%) Confluence
4 12 (7.59%) IIS
5 10 (6.33%) SharePoint
6 3 (1.90%) OpenStack
7 2 (1.27%) CMS
7 2 (1.27%) Traffic Server
8 1 (0.63%) Apache Airflow
8 1 (0.63%) JBoss
8 1 (0.63%) Oracle SOA Suite
8 1 (0.63%) Red Hat Fuse
8 1 (0.63%) Tomcat
8 1 (0.63%) WordPress
Applications
1 4 (2.53%) Microsoft Office
2 1 (0.63%) Microsoft Project
Business Applications
1 3 (1.90%) Oracle Procure-to-Pay
Cloud Services
1 76 (48.10%) AWS
2 45 (28.48%) Azure
3 28 (17.72%) Amazon EC2
4 18 (11.39%) Microsoft 365
5 13 (8.23%) SaaS
6 12 (7.59%) Azure Active Directory
6 12 (7.59%) GCP
7 11 (6.96%) Amazon S3
8 10 (6.33%) Cloud Computing
8 10 (6.33%) GitHub
8 10 (6.33%) OneDrive
9 8 (5.06%) AWS Direct Connect
10 6 (3.80%) AWS Lambda
10 6 (3.80%) Serverless
11 5 (3.16%) Amazon ECS
11 5 (3.16%) Datadog
12 4 (2.53%) Amazon CloudWatch
12 4 (2.53%) Amazon EKS
12 4 (2.53%) Route 53
13 3 (1.90%) Google Workspace
Communications & Networking
1 52 (32.91%) DNS
2 41 (25.95%) Firewall
3 32 (20.25%) DHCP
3 32 (20.25%) VPN
4 27 (17.09%) TCP/IP
5 21 (13.29%) SNMP
6 20 (12.66%) Broadband
7 18 (11.39%) HTTP
8 17 (10.76%) FIX Connectivity
9 14 (8.86%) BGP
9 14 (8.86%) VLAN
10 13 (8.23%) SSL
11 12 (7.59%) OSPF
12 10 (6.33%) IPsec
12 10 (6.33%) IPv6
13 9 (5.70%) VoIP
14 6 (3.80%) BIG-IP
14 6 (3.80%) Multicast
14 6 (3.80%) Network Security
15 5 (3.16%) OpenVPN
Database & Business Intelligence
1 35 (22.15%) PostgreSQL
2 30 (18.99%) MySQL
3 28 (17.72%) SQL Server
4 14 (8.86%) MariaDB
5 9 (5.70%) Amazon RDS
6 6 (3.80%) MongoDB
7 4 (2.53%) NoSQL
8 3 (1.90%) Redis
9 2 (1.27%) Oracle Database
10 1 (0.63%) Amazon Redshift
10 1 (0.63%) Apache Cassandra
10 1 (0.63%) ArangoDB
10 1 (0.63%) Big Data
10 1 (0.63%) Blockchain
10 1 (0.63%) ClickHouse
10 1 (0.63%) Data Warehouse
10 1 (0.63%) Hadoop
10 1 (0.63%) Pentaho
10 1 (0.63%) SQL Server Analysis Services
10 1 (0.63%) SQL Server Reporting Services
Development Applications
1 35 (22.15%) Jenkins
2 29 (18.35%) Git (software)
3 17 (10.76%) JIRA
4 11 (6.96%) GitLab
5 9 (5.70%) Bitbucket
6 5 (3.16%) Maven
7 4 (2.53%) Atlassian Bamboo
7 4 (2.53%) Sonatype Nexus
8 3 (1.90%) Cucumber
8 3 (1.90%) Eclipse
8 3 (1.90%) Gradle
8 3 (1.90%) IntelliJ
8 3 (1.90%) Subversion
9 2 (1.27%) Artifactory
9 2 (1.27%) CircleCI
9 2 (1.27%) GoogleTest
9 2 (1.27%) Selenium
9 2 (1.27%) Snyk
9 2 (1.27%) Trac
9 2 (1.27%) Travis CI
General
1 55 (34.81%) Finance
2 27 (17.09%) Social Skills
3 17 (10.76%) Banking
4 10 (6.33%) Law
5 7 (4.43%) Back Office
5 7 (4.43%) Telecoms
6 6 (3.80%) iGaming
7 5 (3.16%) Retail
8 4 (2.53%) Analytical Skills
9 3 (1.90%) Marketing
9 3 (1.90%) Public Sector
10 2 (1.27%) Advertising
10 2 (1.27%) International Banking
11 1 (0.63%) Financial Institution
11 1 (0.63%) Front Office
11 1 (0.63%) Investment Banking
11 1 (0.63%) Retail Banking
Job Titles
1 28 (17.72%) DevOps Engineer
2 27 (17.09%) Linux Engineer
3 18 (11.39%) Analyst
3 18 (11.39%) Applications Support
3 18 (11.39%) Support Analyst
4 15 (9.49%) Applications Support Analyst
5 12 (7.59%) Administrator
5 12 (7.59%) AWS Engineer
5 12 (7.59%) Platform Engineer
5 12 (7.59%) Systems Engineer
6 11 (6.96%) Linux Systems Engineer
6 11 (6.96%) Network Engineer
7 10 (6.33%) Cloud Engineer
7 10 (6.33%) Senior Linux Engineer
8 9 (5.70%) Linux Administrator
9 8 (5.06%) Infrastructure Manager
9 8 (5.06%) Linux DevOps Engineer
9 8 (5.06%) Principal Engineer
9 8 (5.06%) Release Engineer
9 8 (5.06%) Team Leader
Libraries, Frameworks & Software Standards
1 27 (17.09%) LAMP
2 21 (13.29%) LAPP Stack
3 20 (12.66%) Elastic Stack
3 20 (12.66%) FIX Protocol
4 12 (7.59%) XML
5 11 (6.96%) HTML
5 11 (6.96%) LEMP Stack
5 11 (6.96%) Web Services
6 10 (6.33%) OAuth
6 10 (6.33%) OAuth2
6 10 (6.33%) OpenID
6 10 (6.33%) SAML
7 8 (5.06%) Kafka
8 7 (4.43%) WebSockets
9 6 (3.80%) JSON
9 6 (3.80%) REST
10 5 (3.16%) .NET
10 5 (3.16%) Node.js
11 4 (2.53%) SOAP
12 3 (1.90%) LDAP
Miscellaneous
1 37 (23.42%) Data Centre
2 22 (13.92%) Clustering
3 14 (8.86%) Eurex
4 10 (6.33%) PKI
5 8 (5.06%) Field-Programmable Gate Array
6 6 (3.80%) Derivative
7 5 (3.16%) Client/Server
7 5 (3.16%) Fixed Income
8 4 (2.53%) Equities
8 4 (2.53%) Foreign Exchange (FX)
8 4 (2.53%) Linux Command Line
8 4 (2.53%) NHS
8 4 (2.53%) OTC Derivatives
8 4 (2.53%) Public Cloud
9 3 (1.90%) Data Structures
10 2 (1.27%) Cloud Native
10 2 (1.27%) Distributed Denial-of-Service
10 2 (1.27%) Greenfield Project
10 2 (1.27%) Hybrid Cloud
10 2 (1.27%) Social Media
Operating Systems
1 158 (100.00%) Linux
2 53 (33.54%) Windows
3 47 (29.75%) Ubuntu
4 41 (25.95%) Unix
5 39 (24.68%) Red Hat Enterprise Linux
6 30 (18.99%) Windows Server
7 14 (8.86%) Solaris
8 11 (6.96%) Debian
9 4 (2.53%) Fedora
10 3 (1.90%) SUSE
10 3 (1.90%) Windows Server 2019
11 2 (1.27%) Alpine Linux
11 2 (1.27%) CoreOS
11 2 (1.27%) Windows 10
11 2 (1.27%) Windows Server 2012
11 2 (1.27%) Windows Server 2016
12 1 (0.63%) Amazon Linux
12 1 (0.63%) Apple iOS
12 1 (0.63%) Mesosphere
12 1 (0.63%) Oracle Linux
Processes & Methodologies
1 70 (44.30%) DevOps
2 41 (25.95%) Configuration Management
3 32 (20.25%) Disaster Recovery
4 31 (19.62%) Agile Software Development
5 26 (16.46%) ITIL
6 24 (15.19%) High Availability
7 21 (13.29%) Change Management
8 20 (12.66%) Infrastructure as Code
8 20 (12.66%) Security Patching
9 18 (11.39%) Systems Engineering
10 17 (10.76%) Fintech
11 16 (10.13%) Project Delivery
11 16 (10.13%) Site Reliability Engineering
12 15 (9.49%) Client Onboarding
12 15 (9.49%) Infrastructure Engineering
13 14 (8.86%) Problem-Solving
14 13 (8.23%) Performance Tuning
15 12 (7.59%) Computer Science
15 12 (7.59%) Low Latency
15 12 (7.59%) Task Automation
Programming Languages
1 89 (56.33%) Python
2 64 (40.51%) Bash Shell
3 36 (22.78%) PowerShell
3 36 (22.78%) SQL
4 34 (21.52%) Perl
5 29 (18.35%) Ruby
6 14 (8.86%) Java
6 14 (8.86%) JavaScript
7 13 (8.23%) C#
8 10 (6.33%) Shell Script
9 7 (4.43%) Go
10 6 (3.80%) Groovy
11 4 (2.53%) Kotlin
11 4 (2.53%) PHP
12 3 (1.90%) C++
13 2 (1.27%) C
13 2 (1.27%) R
13 2 (1.27%) Rust
13 2 (1.27%) TypeScript
14 1 (0.63%) Scala
Qualifications
1 27 (17.09%) Degree
2 15 (9.49%) CCNA
2 15 (9.49%) Cisco Certification
3 12 (7.59%) RHCE
3 12 (7.59%) RHCSA
4 9 (5.70%) CCENT
4 9 (5.70%) SC Cleared
4 9 (5.70%) Security Cleared
5 8 (5.06%) DV Cleared
6 3 (1.90%) AWS Certification
6 3 (1.90%) MCSA
6 3 (1.90%) Microsoft Certification
7 1 (0.63%) Computer Science Degree
7 1 (0.63%) PRINCE2 Practitioner
Quality Assurance & Compliance
1 10 (6.33%) QA
2 4 (2.53%) GDPR
3 2 (1.27%) Sarbanes-Oxley
3 2 (1.27%) SLA
System Software
1 41 (25.95%) Active Directory
2 40 (25.32%) Docker
3 25 (15.82%) VMware Infrastructure
4 16 (10.13%) iptables
5 5 (3.16%) Firmware
5 5 (3.16%) KVM
6 4 (2.53%) Hyper-V
6 4 (2.53%) VMware ESXi
7 2 (1.27%) LXC
7 2 (1.27%) Squid
7 2 (1.27%) Varnish
7 2 (1.27%) Virtual Machines
7 2 (1.27%) Xen
8 1 (0.63%) Apache ZooKeeper
8 1 (0.63%) FreeRADIUS
8 1 (0.63%) StorNext
8 1 (0.63%) vSphere
8 1 (0.63%) Xsan
Systems Management
1 73 (46.20%) Ansible
2 53 (33.54%) Puppet
3 46 (29.11%) Terraform
4 36 (22.78%) Kubernetes
5 16 (10.13%) Icinga
5 16 (10.13%) Opscode Chef
6 15 (9.49%) Nagios
7 14 (8.86%) Grafana
7 14 (8.86%) Prometheus
7 14 (8.86%) ZABBIX
8 13 (8.23%) Failover Clustering
9 10 (6.33%) Packer
10 6 (3.80%) Docker Swarm
10 6 (3.80%) Red Hat Satellite
11 5 (3.16%) Consul
11 5 (3.16%) logstash
12 4 (2.53%) HAProxy
13 3 (1.90%) Graphite
14 2 (1.27%) Control-M
15 1 (0.63%) NetBackup
Vendors
1 73 (46.20%) Red Hat
2 41 (25.95%) VMware
3 39 (24.68%) Cisco
4 21 (13.29%) Oracle
5 18 (11.39%) Solarflare
6 17 (10.76%) HP
7 16 (10.13%) Google
8 14 (8.86%) Dell
9 13 (8.23%) Bloomberg
9 13 (8.23%) CQG
9 13 (8.23%) Fidessa
9 13 (8.23%) ION Trading
9 13 (8.23%) Patsystems
9 13 (8.23%) Reuters
9 13 (8.23%) Trayport
10 12 (7.59%) Mellanox
10 12 (7.59%) Supermicro
11 11 (6.96%) Juniper
12 10 (6.33%) Atlassian
12 10 (6.33%) NetIQ