Period
to 13 December 2018

The following table provides summary statistics for contract job vacancies advertised in England 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 13 December 2018 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
UK > England
6 months to
13 Dec 2018
Same period 2017 Same period 2016
Rank 388 402 307
Rank change year-on-year +14 -95 +108
Contract jobs citing CentOS 620 561 791
As % of all contract IT jobs advertised in England 0.64% 0.59% 0.83%
As % of the Operating Systems category 3.06% 2.83% 3.92%
Number of daily rates quoted 404 414 565
England median daily rate £475 £463 £463
Median daily rate % change year-on-year +2.70% - +8.82%
10th Percentile £363 £313 £313
90th Percentile £625 £588 £588
UK median daily rate £475 £453 £463
% change year-on-year +4.97% -2.16% +8.82%
Number of hourly rates quoted 4 11 5
England median hourly rate £44.58 £29.00 £13.50
Median hourly rate % change year-on-year +53.72% +114.81% -64.47%
10th Percentile £36.22 £17.00 £11.48
90th Percentile £49.20 £48.75 £18.00
UK median hourly rate £44.58 £29.00 £13.50
% change year-on-year +53.72% +114.81% -64.47%

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 England with a requirement for operating system skills.

All Operating Systems
England
Contract vacancies with a requirement for operating system skills 20,276 19,795 20,165
As % of all contract IT jobs advertised in England 21.03% 20.83% 21.12%
Number of daily rates quoted 12,645 12,796 12,847
England median daily rate £425 £425 £413
Median daily rate % change year-on-year - +3.03% +3.13%
10th Percentile £163 £173 £200
90th Percentile £613 £606 £575
UK median daily rate £425 £425 £400
% change year-on-year - +6.25% -
Number of hourly rates quoted 1,355 1,166 1,173
England median hourly rate £17.50 £17.50 £16.50
Median hourly rate % change year-on-year - +6.06% -
10th Percentile £11.17 £11.00 £10.63
90th Percentile £47.50 £47.83 £44.45
UK median hourly rate £17.43 £17.50 £16.29
% change year-on-year -0.40% +7.43% -1.27%

CentOS
Job Vacancy Trend in England

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

Job vacancy trend for CentOS in England

CentOS
Contractor Daily Rate Trend in England

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

Contractor daily rate trend for CentOS in England

CentOS
Contractor Daily Rate Histogram in England

The daily rate distribution of IT jobs citing CentOS in England over the 6 months to 13 December 2018.

Contractor daily rate histogram for CentOS in England

CentOS
Contractor Hourly Rate Trend in England

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

Contractor hourly rate trend for CentOS in England

CentOS
Contractor Hourly Rate Histogram in England

The hourly rate distribution of IT jobs citing CentOS in England over the 6 months to 13 December 2018.

Contractor hourly rate histogram for CentOS in England

CentOS
Contract Job Locations in England

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the England region over the 6 months to 13 December 2018. 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
London -50 247 £523 +4.50% 63
North of England +49 127 £463 +6.94% 26
South East +32 112 £450 +2.27% 39
North West +9 67 £450 +4.05% 12
South West -21 60 £425 +21.43% 21
East of England +35 46 £450 +18.42% 9
North East +29 34 £525 - 5
Yorkshire 0 32 £450 -5.26% 9
Midlands -17 27 £400 +14.29% 17
East Midlands +12 20 £400 +14.29% 6
West Midlands -35 6 £400 -3.03% 10
CentOS
UK

For the 6 months to 13 December 2018, 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 England region with a requirement for CentOS.

1 620 (100.00%) Linux
2 313 (50.48%) Red Hat
3 310 (50.00%) DevOps
4 298 (48.06%) Red Hat Enterprise Linux
5 282 (45.48%) Ansible
6 279 (45.00%) Puppet
7 268 (43.23%) Amazon AWS
8 252 (40.65%) Docker
9 237 (38.23%) Jenkins
10 229 (36.94%) Terraform
11 222 (35.81%) Python
12 210 (33.87%) Agile Software Development
13 194 (31.29%) Bash Shell
14 174 (28.06%) Git (software)
15 160 (25.81%) Windows
16 155 (25.00%) Kubernetes
17 137 (22.10%) Security Cleared
18 132 (21.29%) MySQL
19 128 (20.65%) VMware
20 118 (19.03%) Configuration Management
21 109 (17.58%) Java
22 104 (16.77%) SC Cleared
23 103 (16.61%) Unix
24 101 (16.29%) Ubuntu
25 98 (15.81%) MongoDB
26 96 (15.48%) Elastic Stack
27 93 (15.00%) Continuous Integration
28 92 (14.84%) Amazon EC2
29 87 (14.03%) VMware Infrastructure
29 87 (14.03%) Packer

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 72 (11.61%) Apache
2 61 (9.84%) nginx
3 49 (7.90%) OpenStack
4 46 (7.42%) Tomcat
5 39 (6.29%) Confluence
6 26 (4.19%) Elasticsearch
7 17 (2.74%) IIS
8 14 (2.26%) Jetty
8 14 (2.26%) WebSphere
9 13 (2.10%) Mongrel
10 9 (1.45%) JBoss
11 8 (1.29%) Skype for Business
12 7 (1.13%) CMS
13 4 (0.65%) lighttpd
13 4 (0.65%) WebLogic
14 3 (0.48%) Apache Spark
14 3 (0.48%) MS Exchange
15 2 (0.32%) Drupal
16 1 (0.16%) Mule ESB
16 1 (0.16%) WildFly
Applications
1 8 (1.29%) Chatbot
1 8 (1.29%) Microsoft Office
2 2 (0.32%) HipChat
2 2 (0.32%) Houdini
2 2 (0.32%) Maya
2 2 (0.32%) NUKE
2 2 (0.32%) Photoshop
Business Applications
1 3 (0.48%) Towers Watson Igloo
2 1 (0.16%) Magento
Cloud Services
1 268 (43.23%) Amazon AWS
2 92 (14.84%) Amazon EC2
3 81 (13.06%) Microsoft Azure
4 68 (10.97%) Virtual Private Cloud
5 67 (10.81%) Amazon S3
6 55 (8.87%) AWS CloudFormation
7 49 (7.90%) Route 53
8 43 (6.94%) Amazon ELB
9 35 (5.65%) GitHub
10 28 (4.52%) Amazon CloudWatch
11 23 (3.71%) Google Cloud Platform
12 21 (3.39%) Cloud Computing
12 21 (3.39%) IaaS
13 16 (2.58%) Datadog
14 11 (1.77%) Sumo Logic
15 10 (1.61%) Amazon SQS
16 9 (1.45%) PaaS
16 9 (1.45%) Slack
17 8 (1.29%) Apigee
17 8 (1.29%) G Suite
Communications & Networking
1 68 (10.97%) Firewall
2 66 (10.65%) HTTP
3 49 (7.90%) DNS
4 25 (4.03%) OpenLDAP
5 20 (3.23%) SSH
6 19 (3.06%) Kerberos
7 18 (2.90%) Network Security
7 18 (2.90%) SSL
7 18 (2.90%) VPN
8 16 (2.58%) SAN
9 15 (2.42%) LAN
9 15 (2.42%) TCP/IP
10 14 (2.26%) WAN
11 13 (2.10%) DHCP
11 13 (2.10%) Internet
12 11 (1.77%) OpenVPN
13 9 (1.45%) Skype
13 9 (1.45%) Unicast
14 8 (1.29%) SMS
15 7 (1.13%) Ethernet
Database & Business Intelligence
1 132 (21.29%) MySQL
2 98 (15.81%) MongoDB
3 60 (9.68%) PostgreSQL
4 46 (7.42%) Hadoop
5 42 (6.77%) Apache Cassandra
6 27 (4.35%) Amazon RDS
7 22 (3.55%) SQL Server
8 19 (3.06%) NoSQL
9 14 (2.26%) Big Data
10 12 (1.94%) MariaDB
11 10 (1.61%) Redis
12 8 (1.29%) MarkLogic
13 7 (1.13%) Ingres
13 7 (1.13%) Relational Database
14 6 (0.97%) Oracle Database
15 2 (0.32%) Amazon Redshift
15 2 (0.32%) Apache Hive
15 2 (0.32%) Cloudera CDH
15 2 (0.32%) HBase
15 2 (0.32%) SQL Server 2016
Development Applications
1 237 (38.23%) Jenkins
2 174 (28.06%) Git (software)
3 84 (13.55%) GitLab
4 65 (10.48%) Vagrant
5 59 (9.52%) JIRA
6 57 (9.19%) SonarQube
7 55 (8.87%) Sonatype Nexus
8 51 (8.23%) Maven
9 43 (6.94%) Atlassian Bamboo
10 24 (3.87%) Travis CI
11 23 (3.71%) Ant
12 21 (3.39%) TeamCity
13 15 (2.42%) MSBuild
14 14 (2.26%) Gradle
15 13 (2.10%) CruiseControl
16 12 (1.94%) Bitbucket
16 12 (1.94%) JUnit
17 9 (1.45%) Artifactory
17 9 (1.45%) Gerrit
17 9 (1.45%) Liquibase
General
1 28 (4.52%) Finance
2 21 (3.39%) Telecoms
3 11 (1.77%) Marketing
4 10 (1.61%) Manufacturing
5 8 (1.29%) Electronics
6 7 (1.13%) Billing
7 5 (0.81%) Advertising
7 5 (0.81%) Automotive
7 5 (0.81%) Games
7 5 (0.81%) Publishing
8 4 (0.65%) Banking
9 2 (0.32%) Legal
9 2 (0.32%) Retail
10 1 (0.16%) Aerospace
10 1 (0.16%) Financial Institution
10 1 (0.16%) Pharmaceutical
Job Titles
1 225 (36.29%) DevOps Engineer
2 95 (15.32%) Administrator
3 80 (12.90%) Systems Administrator
4 73 (11.77%) AWS Engineer
5 72 (11.61%) Linux Engineer
6 65 (10.48%) Developer
7 64 (10.32%) AWS DevOps
7 64 (10.32%) Linux Administrator
8 60 (9.68%) AWS DevOps Engineer
9 56 (9.03%) Linux Systems Administrator
10 26 (4.19%) Linux/Unix DevOps
11 22 (3.55%) Senior DevOps
12 21 (3.39%) Linux DevOps Engineer
12 21 (3.39%) Unix Administrator
13 20 (3.23%) Architect
13 20 (3.23%) Azure DevOps
13 20 (3.23%) Systems Engineer
14 18 (2.90%) Platform Engineer
15 17 (2.74%) Azure Engineer
15 17 (2.74%) Senior DevOps Engineer
Libraries, Frameworks & Software Standards
1 96 (15.48%) Elastic Stack
2 42 (6.77%) Kafka
3 37 (5.97%) LEMP Stack
4 36 (5.81%) LDAP
5 31 (5.00%) LAMP
6 26 (4.19%) Spring Boot
7 25 (4.03%) HTML
7 25 (4.03%) LAPP Stack
7 25 (4.03%) Node.js
8 24 (3.87%) Web Services
9 23 (3.71%) RabbitMQ
10 22 (3.55%) AngularJS
10 22 (3.55%) JSON
11 20 (3.23%) XML
12 19 (3.06%) React
13 16 (2.58%) Sensu
14 15 (2.42%) Spring
14 15 (2.42%) Zuul
15 14 (2.26%) jQuery
15 14 (2.26%) RESTful
Miscellaneous
1 31 (5.00%) Data Centre
2 28 (4.52%) Linux Command Line
3 25 (4.03%) Public Cloud
4 23 (3.71%) Device Driver
4 23 (3.71%) Management Information System
5 22 (3.55%) Analytical Skills
6 18 (2.90%) PKI
7 17 (2.74%) Self-Motivation
8 14 (2.26%) Private Cloud
8 14 (2.26%) Replication
9 9 (1.45%) Blog
9 9 (1.45%) Mobile App
10 8 (1.29%) Fat Client
10 8 (1.29%) Thin Client
11 6 (0.97%) Clustering
11 6 (0.97%) CMDB
12 5 (0.81%) Animation
12 5 (0.81%) Distributed Denial-of-Service
12 5 (0.81%) Video on Demand
13 4 (0.65%) Cyberthreat
Operating Systems
1 620 (100.00%) Linux
2 298 (48.06%) Red Hat Enterprise Linux
3 160 (25.81%) Windows
4 103 (16.61%) Unix
5 101 (16.29%) Ubuntu
6 59 (9.52%) Windows Server
7 36 (5.81%) Solaris
8 29 (4.68%) Debian
9 22 (3.55%) Windows Server 2008
10 16 (2.58%) Fedora
11 15 (2.42%) AIX
11 15 (2.42%) Windows 7
12 14 (2.26%) SUSE
13 11 (1.77%) Windows Server 2012
14 9 (1.45%) Windows 10
15 6 (0.97%) CoreOS
15 6 (0.97%) DC/OS
15 6 (0.97%) FreeBSD
15 6 (0.97%) HPUX
15 6 (0.97%) Oracle Linux
Processes & Methodologies
1 310 (50.00%) DevOps
2 210 (33.87%) Agile Software Development
3 118 (19.03%) Configuration Management
4 93 (15.00%) Continuous Integration
5 75 (12.10%) Open Source
6 56 (9.03%) Microservices
6 56 (9.03%) Scrum
7 50 (8.06%) Continuous Delivery
8 39 (6.29%) High Availability
9 38 (6.13%) Problem-Solving
10 37 (5.97%) Software Engineering
11 34 (5.48%) Migration
12 33 (5.32%) Coaching
13 32 (5.16%) Analytics
13 32 (5.16%) Deployment Automation
13 32 (5.16%) Immutable Infrastructure
14 31 (5.00%) Infrastructure Monitoring
14 31 (5.00%) ITIL
14 31 (5.00%) Waterfall
15 28 (4.52%) Business Development
Programming Languages
1 222 (35.81%) Python
2 194 (31.29%) Bash Shell
3 109 (17.58%) Java
4 81 (13.06%) Perl
5 76 (12.26%) PowerShell
6 73 (11.77%) JavaScript
7 72 (11.61%) Shell Script
8 55 (8.87%) SQL
9 46 (7.42%) PHP
10 45 (7.26%) Ruby
11 35 (5.65%) Go
12 27 (4.35%) C#
12 27 (4.35%) Groovy
13 9 (1.45%) C++
14 8 (1.29%) C
14 8 (1.29%) R
15 7 (1.13%) Java 8
15 7 (1.13%) PL/SQL
16 6 (0.97%) Korn
17 3 (0.48%) Bourne shell
Qualifications
1 137 (22.10%) Security Cleared
2 104 (16.77%) SC Cleared
3 21 (3.39%) Degree
4 20 (3.23%) DV Cleared
5 16 (2.58%) Computer Science Degree
6 10 (1.61%) CCNA
6 10 (1.61%) Cisco Certification
7 9 (1.45%) BPSS Clearance
8 5 (0.81%) Microsoft Certification
9 4 (0.65%) CISSP
9 4 (0.65%) RHCE
10 3 (0.48%) RHCSA
11 2 (0.32%) CISM
11 2 (0.32%) MCSA
11 2 (0.32%) MCSE
11 2 (0.32%) OCA
11 2 (0.32%) OCP
11 2 (0.32%) Oracle Certification
11 2 (0.32%) Sun Certification
11 2 (0.32%) VCAP
Quality Assurance & Compliance
1 23 (3.71%) QA
2 7 (1.13%) FedRAMP
3 4 (0.65%) ISO/IEC 27001
4 3 (0.48%) JSP 440
5 2 (0.32%) COBIT
5 2 (0.32%) Sarbanes-Oxley
5 2 (0.32%) SLA
6 1 (0.16%) Data Quality
6 1 (0.16%) Disclosure Scotland
6 1 (0.16%) Government Security Classifications
System Software
1 252 (40.65%) Docker
2 87 (14.03%) VMware Infrastructure
3 71 (11.45%) Active Directory
4 43 (6.94%) Virtual Machines
5 33 (5.32%) Hyper-V
6 27 (4.35%) VirtualBox
7 19 (3.06%) VMware ESXi
8 16 (2.58%) vCloud
9 14 (2.26%) NFS
9 14 (2.26%) vSphere
10 13 (2.10%) Postfix
11 12 (1.94%) Samba
11 12 (1.94%) Squid
12 9 (1.45%) KVM
13 8 (1.29%) XenDesktop
14 7 (1.13%) Apache ZooKeeper
14 7 (1.13%) iptables
14 7 (1.13%) Varnish
14 7 (1.13%) Virtual Servers
15 6 (0.97%) Xen
Systems Management
1 282 (45.48%) Ansible
2 279 (45.00%) Puppet
3 229 (36.94%) Terraform
4 155 (25.00%) Kubernetes
5 87 (14.03%) Packer
6 86 (13.87%) Nagios
7 80 (12.90%) Opscode Chef
8 68 (10.97%) Grafana
9 63 (10.16%) Prometheus
10 40 (6.45%) Icinga
11 38 (6.13%) Rancher
12 31 (5.00%) Consul
12 31 (5.00%) Kibana
12 31 (5.00%) logstash
13 28 (4.52%) Salt
14 27 (4.35%) ZABBIX
15 22 (3.55%) Docker Swarm
16 20 (3.23%) HAProxy
17 12 (1.94%) Graylog
18 10 (1.61%) Opsview
Vendors
1 313 (50.48%) Red Hat
2 128 (20.65%) VMware
3 79 (12.74%) Microsoft
4 61 (9.84%) Black Duck
5 55 (8.87%) Oracle
6 48 (7.74%) Google
7 40 (6.45%) Splunk
8 30 (4.84%) Cisco
9 25 (4.03%) ServiceNow
10 24 (3.87%) New Relic
11 21 (3.39%) Citrix
12 20 (3.23%) NetApp
13 18 (2.90%) HP
14 14 (2.26%) AppDynamics
15 13 (2.10%) Atlassian
16 12 (1.94%) CheckPoint
17 9 (1.45%) Sonatype
18 8 (1.29%) Hortonworks
18 8 (1.29%) Juniper
18 8 (1.29%) McAfee