Period
to 21 January 2019

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

Note that daily and hourly rates are treated separately in these statistics. When calculating contractor rate percentiles, daily rates are never derived from quoted hourly rates or vice versa.

CentOS Linux
England > London
6 months to
21 Jan 2019
Same period 2018 Same period 2017
Rank 430 338 248
Rank change year-on-year -92 -90 +39
Contract jobs citing CentOS 194 344 436
As % of all contract IT jobs advertised in London 0.44% 0.75% 1.05%
As % of the Operating Systems category 2.25% 3.65% 5.05%
Number of daily rates quoted 130 248 304
London median daily rate £520 £500 £475
Median daily rate % change year-on-year +4.00% +5.26% +5.56%
10th Percentile £400 £329 £325
90th Percentile £600 £638 £598
England median daily rate £475 £475 £463
% change year-on-year - +2.70% +3.35%
Number of hourly rates quoted 0 5 1
London median hourly rate - £29.00 £16.00
Median hourly rate % change year-on-year - +81.25% -68.00%
England median hourly rate £38.41 £29.00 £17.00
% change year-on-year +32.46% +70.59% -66.00%

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

All Operating Systems
London
Contract vacancies with a requirement for operating system skills 8,607 9,436 8,639
As % of all contract IT jobs advertised in London 19.48% 20.60% 20.82%
Number of daily rates quoted 6,003 6,724 5,988
London median daily rate £488 £475 £450
Median daily rate % change year-on-year +2.63% +5.56% +5.88%
10th Percentile £185 £200 £238
90th Percentile £650 £638 £613
England median daily rate £425 £425 £413
% change year-on-year - +3.03% +3.13%
Number of hourly rates quoted 248 281 198
London median hourly rate £18.70 £18.70 £19.00
Median hourly rate % change year-on-year - -1.58% +8.93%
10th Percentile £12.50 £12.00 £12.43
90th Percentile £46.98 £47.83 £50.38
England median hourly rate £17.50 £17.50 £16.50
% change year-on-year - +6.06% -2.02%

CentOS
Job Vacancy Trend in London

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

Job vacancy trend for CentOS in London

CentOS
Contractor Daily Rate Trend in London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing CentOS in London.

Contractor daily rate trend for CentOS in London

CentOS
Contractor Daily Rate Histogram in London

The daily rate distribution of IT jobs citing CentOS in London over the 6 months to 21 January 2019.

Contractor daily rate histogram for CentOS in London

CentOS
Contractor Hourly Rate Trend in London

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing CentOS in London.

Contractor hourly rate trend for CentOS in London

CentOS
Contract Job Locations in London

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the London region over the 6 months to 21 January 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
Contract
IT Job Ads
Median
Daily Rate
Past 6 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
South London -17 41 £450 -12.20% 4
Central London -22 22 £463 -11.27% 21
West London -9 2 £538 +4.37% 18
CentOS
England

For the 6 months to 21 January 2019, IT contractor 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 contract job ads across the London region with a requirement for CentOS.

1 194 (100.00%) Linux
2 123 (63.40%) DevOps
3 92 (47.42%) Jenkins
4 91 (46.91%) Docker
5 87 (44.85%) Amazon AWS
6 83 (42.78%) Puppet
7 81 (41.75%) Bash Shell
7 81 (41.75%) Red Hat
8 80 (41.24%) Terraform
9 75 (38.66%) Python
10 71 (36.60%) Red Hat Enterprise Linux
11 70 (36.08%) Agile Software Development
12 68 (35.05%) Ansible
13 65 (33.51%) Ubuntu
14 63 (32.47%) Windows
15 59 (30.41%) Microsoft Azure
16 56 (28.87%) Git (software)
17 55 (28.35%) VMware
18 54 (27.84%) Security Cleared
18 54 (27.84%) Kubernetes
19 48 (24.74%) SC Cleared
19 48 (24.74%) Java
20 45 (23.20%) Continuous Integration
21 40 (20.62%) VMware Infrastructure
21 40 (20.62%) Configuration Management
22 39 (20.10%) Nagios
23 33 (17.01%) Elastic Stack
23 33 (17.01%) Go
24 32 (16.49%) PowerShell
25 31 (15.98%) Microsoft

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 26 (13.40%) Tomcat
2 24 (12.37%) Apache
3 21 (10.82%) nginx
4 18 (9.28%) Confluence
5 16 (8.25%) IIS
6 13 (6.70%) Elasticsearch
6 13 (6.70%) Jetty
6 13 (6.70%) Mongrel
6 13 (6.70%) WebSphere
7 10 (5.15%) OpenStack
8 7 (3.61%) JBoss
9 3 (1.55%) CMS
9 3 (1.55%) MS Exchange
10 2 (1.03%) Drupal
10 2 (1.03%) GeoServer
11 1 (0.52%) Apache TomEE
11 1 (0.52%) concrete5
11 1 (0.52%) Exchange Server 2013
11 1 (0.52%) Skype for Business
11 1 (0.52%) WebLogic
Applications
1 1 (0.52%) Chatbot
1 1 (0.52%) HipChat
Cloud Services
1 87 (44.85%) Amazon AWS
2 59 (30.41%) Microsoft Azure
3 28 (14.43%) AWS CloudFormation
3 28 (14.43%) GitHub
4 18 (9.28%) Amazon EC2
5 15 (7.73%) Google Cloud Platform
6 14 (7.22%) Amazon CloudWatch
6 14 (7.22%) Amazon S3
6 14 (7.22%) IaaS
7 13 (6.70%) Cloud Computing
7 13 (6.70%) Virtual Private Cloud
8 11 (5.67%) Sumo Logic
9 9 (4.64%) Datadog
10 8 (4.12%) G Suite
11 7 (3.61%) Azure Active Directory
11 7 (3.61%) PaaS
12 6 (3.09%) Amazon ELB
13 4 (2.06%) Slack
14 3 (1.55%) AWS Lambda
14 3 (1.55%) Trello
Communications & Networking
1 21 (10.82%) HTTP
2 20 (10.31%) Firewall
3 15 (7.73%) DNS
4 12 (6.19%) VPN
5 6 (3.09%) Network Security
5 6 (3.09%) OpenLDAP
5 6 (3.09%) OpenVPN
5 6 (3.09%) SAN
5 6 (3.09%) SSH
6 5 (2.58%) FTP
6 5 (2.58%) Intrusion Detection
6 5 (2.58%) VLAN
7 3 (1.55%) DHCP
7 3 (1.55%) SSL
7 3 (1.55%) TCP/IP
7 3 (1.55%) VoIP
8 2 (1.03%) BGP
8 2 (1.03%) Ethernet
8 2 (1.03%) Internet
8 2 (1.03%) SMTP
Database & Business Intelligence
1 25 (12.89%) MongoDB
2 24 (12.37%) PostgreSQL
3 16 (8.25%) Amazon RDS
4 11 (5.67%) MySQL
5 8 (4.12%) SQL Server
6 6 (3.09%) Redis
7 5 (2.58%) Azure SQL Database
8 4 (2.06%) NoSQL
9 3 (1.55%) Apache Cassandra
10 2 (1.03%) Oracle Database
10 2 (1.03%) Relational Database
10 2 (1.03%) SQL Server 2016
11 1 (0.52%) Amazon Athena
11 1 (0.52%) Amazon DynamoDB
11 1 (0.52%) Amazon Redshift
11 1 (0.52%) DB2
11 1 (0.52%) Electronic Patient Records
11 1 (0.52%) SQLite
Development Applications
1 92 (47.42%) Jenkins
2 56 (28.87%) Git (software)
3 30 (15.46%) Vagrant
4 26 (13.40%) JIRA
4 26 (13.40%) Maven
5 22 (11.34%) Atlassian Bamboo
6 20 (10.31%) Ant
6 20 (10.31%) Travis CI
7 15 (7.73%) TeamCity
8 14 (7.22%) Gradle
9 13 (6.70%) CruiseControl
9 13 (6.70%) MSBuild
9 13 (6.70%) SonarQube
10 10 (5.15%) Artifactory
10 10 (5.15%) Sonatype Nexus
11 9 (4.64%) Gerrit
12 6 (3.09%) GitLab
12 6 (3.09%) JUnit
12 6 (3.09%) Liquibase
13 5 (2.58%) Bitbucket
General
1 10 (5.15%) Finance
2 3 (1.55%) Manufacturing
2 3 (1.55%) Marketing
3 2 (1.03%) Publishing
3 2 (1.03%) Telecoms
4 1 (0.52%) Aerospace
4 1 (0.52%) Banking
4 1 (0.52%) Electronics
4 1 (0.52%) Financial Institution
4 1 (0.52%) Games
4 1 (0.52%) Pharmaceutical
4 1 (0.52%) Retail
Job Titles
1 98 (50.52%) DevOps Engineer
2 37 (19.07%) AWS Engineer
3 34 (17.53%) Linux Engineer
4 30 (15.46%) AWS DevOps
5 27 (13.92%) AWS DevOps Engineer
6 22 (11.34%) Administrator
7 21 (10.82%) Systems Administrator
8 20 (10.31%) Azure DevOps
9 17 (8.76%) Azure DevOps Engineer
9 17 (8.76%) Azure Engineer
10 15 (7.73%) Linux Administrator
11 13 (6.70%) Linux Systems Administrator
12 11 (5.67%) Systems Engineer
13 10 (5.15%) Developer
13 10 (5.15%) Security Engineer
14 9 (4.64%) Linux Systems Engineer
14 9 (4.64%) Linux/Unix DevOps
14 9 (4.64%) Platform Engineer
15 7 (3.61%) Linux DevOps Engineer
15 7 (3.61%) Senior DevOps Engineer
Libraries, Frameworks & Software Standards
1 33 (17.01%) Elastic Stack
2 25 (12.89%) Kafka
3 13 (6.70%) JRuby
3 13 (6.70%) Sensu
3 13 (6.70%) Servlets
4 11 (5.67%) HTML
5 10 (5.15%) JSON
6 9 (4.64%) CSS
6 9 (4.64%) REST
7 6 (3.09%) AngularJS
7 6 (3.09%) JSP
7 6 (3.09%) MCollective
7 6 (3.09%) RabbitMQ
7 6 (3.09%) XML
8 5 (2.58%) HTML5
8 5 (2.58%) LDAP
8 5 (2.58%) Web Services
9 4 (2.06%) Node.js
9 4 (2.06%) RESTful
9 4 (2.06%) Twitter Bootstrap
Miscellaneous
1 19 (9.79%) Device Driver
2 13 (6.70%) Linux Command Line
3 11 (5.67%) Public Cloud
4 10 (5.15%) Blog
4 10 (5.15%) Data Centre
5 6 (3.09%) Fat Client
5 6 (3.09%) Management Information System
5 6 (3.09%) Thin Client
6 5 (2.58%) Analytical Skills
7 4 (2.06%) Fintech
8 2 (1.03%) Life Science
8 2 (1.03%) Replication
9 1 (0.52%) Cloud Native
9 1 (0.52%) Fixed Income
9 1 (0.52%) Greenfield Project
9 1 (0.52%) Hedge funds
9 1 (0.52%) Mainframe
9 1 (0.52%) Mobile App
9 1 (0.52%) Over-the-Top Content
9 1 (0.52%) Video on Demand
Operating Systems
1 194 (100.00%) Linux
2 71 (36.60%) Red Hat Enterprise Linux
3 65 (33.51%) Ubuntu
4 63 (32.47%) Windows
5 28 (14.43%) Windows Server
6 22 (11.34%) Unix
7 16 (8.25%) Debian
8 15 (7.73%) Fedora
9 10 (5.15%) Windows Server 2008
10 5 (2.58%) CoreOS
11 3 (1.55%) DC/OS
11 3 (1.55%) Solaris
11 3 (1.55%) Windows Server 2012
12 2 (1.03%) Android
12 2 (1.03%) HPUX
12 2 (1.03%) Mac OS X
12 2 (1.03%) Mesosphere
12 2 (1.03%) Windows 10
12 2 (1.03%) Windows 7
13 1 (0.52%) RancherOS
Processes & Methodologies
1 123 (63.40%) DevOps
2 70 (36.08%) Agile Software Development
3 45 (23.20%) Continuous Integration
4 40 (20.62%) Configuration Management
5 25 (12.89%) Immutable Infrastructure
5 25 (12.89%) Scrum
6 24 (12.37%) High Availability
7 23 (11.86%) Open Source
8 22 (11.34%) Deployment Automation
9 20 (10.31%) Continuous Delivery
10 18 (9.28%) Site Reliability Engineering
11 16 (8.25%) Computer Science
12 12 (6.19%) Cloud Operations
12 12 (6.19%) Desktop Virtualisation
12 12 (6.19%) Problem-Solving
13 10 (5.15%) Kanban
14 9 (4.64%) Data Security
14 9 (4.64%) Security Management
14 9 (4.64%) Ticket Management
14 9 (4.64%) User Acceptance Testing
Programming Languages
1 81 (41.75%) Bash Shell
2 75 (38.66%) Python
3 48 (24.74%) Java
4 33 (17.01%) Go
5 32 (16.49%) PowerShell
6 23 (11.86%) Perl
7 22 (11.34%) JavaScript
8 21 (10.82%) Ruby
9 16 (8.25%) Groovy
9 16 (8.25%) SQL
10 13 (6.70%) C#
11 12 (6.19%) Shell Script
12 4 (2.06%) PHP
13 1 (0.52%) Bourne shell
13 1 (0.52%) C++
13 1 (0.52%) Korn
13 1 (0.52%) PL/SQL
13 1 (0.52%) R
13 1 (0.52%) XPath
Qualifications
1 54 (27.84%) Security Cleared
2 48 (24.74%) SC Cleared
3 16 (8.25%) Degree
4 14 (7.22%) Computer Science Degree
5 3 (1.55%) DV Cleared
5 3 (1.55%) Microsoft Certification
6 2 (1.03%) Master's Degree
6 2 (1.03%) MCSA
6 2 (1.03%) MCSE
6 2 (1.03%) RHCE
6 2 (1.03%) VMware Certified Professional (VCP)
7 1 (0.52%) AWS Certification
Quality Assurance & Compliance
1 7 (3.61%) FedRAMP
2 4 (2.06%) QA
3 2 (1.03%) ISO/IEC 27001
System Software
1 91 (46.91%) Docker
2 40 (20.62%) VMware Infrastructure
3 22 (11.34%) Hyper-V
3 22 (11.34%) VirtualBox
4 20 (10.31%) Active Directory
5 15 (7.73%) Virtual Machines
6 7 (3.61%) Postfix
6 7 (3.61%) Squid
6 7 (3.61%) Virtual Servers
6 7 (3.61%) VMware ESXi
7 6 (3.09%) KVM
7 6 (3.09%) vCloud
8 5 (2.58%) Apache ZooKeeper
9 3 (1.55%) iptables
9 3 (1.55%) Varnish
10 2 (1.03%) VMware Workstation
10 2 (1.03%) XenApp
10 2 (1.03%) XenDesktop
10 2 (1.03%) XenServer
11 1 (0.52%) Oracle RAC
Systems Management
1 83 (42.78%) Puppet
2 80 (41.24%) Terraform
3 68 (35.05%) Ansible
4 54 (27.84%) Kubernetes
5 39 (20.10%) Nagios
6 27 (13.92%) Opscode Chef
6 27 (13.92%) Packer
7 24 (12.37%) Grafana
8 23 (11.86%) Prometheus
9 21 (10.82%) logstash
10 20 (10.31%) Icinga
11 19 (9.79%) Kibana
12 14 (7.22%) Salt
13 12 (6.19%) Graylog
14 10 (5.15%) Docker Swarm
15 8 (4.12%) ZABBIX
16 6 (3.09%) Rancher
17 5 (2.58%) Consul
17 5 (2.58%) Graphite
17 5 (2.58%) Sysdig
Vendors
1 81 (41.75%) Red Hat
2 55 (28.35%) VMware
3 31 (15.98%) Microsoft
4 30 (15.46%) Google
5 27 (13.92%) Splunk
6 20 (10.31%) New Relic
7 16 (8.25%) Oracle
8 13 (6.70%) Atlassian
8 13 (6.70%) Cisco
9 12 (6.19%) AppDynamics
10 11 (5.67%) ServiceNow
11 9 (4.64%) Citrix
12 6 (3.09%) MKS
12 6 (3.09%) Sonatype
13 5 (2.58%) Hortonworks
14 4 (2.06%) Axway
14 4 (2.06%) HP
14 4 (2.06%) NetApp
15 3 (1.55%) Dell
15 3 (1.55%) Juniper