Period
to 17 July 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 17 July 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
17 Jul 2018
Same period 2017 Same period 2016
Rank 369 331 377
Rank change year-on-year -38 +46 +78
Contract jobs citing CentOS 611 648 640
As % of all contract IT jobs advertised in England 0.65% 0.74% 0.63%
As % of the Operating Systems category 3.10% 3.63% 2.84%
Number of daily rates quoted 408 466 455
England median daily rate £500 £490 £450
Median daily rate % change year-on-year +2.04% +8.89% +12.50%
10th Percentile £355 £340 £300
90th Percentile £625 £600 £588
UK median daily rate £500 £488 £450
% change year-on-year +2.56% +8.33% +12.50%
Number of hourly rates quoted 5 12 6
England median hourly rate £49.50 £37.50 £13.50
Median hourly rate % change year-on-year +32.00% +177.78% -
10th Percentile £16.96 £14.34 £9.44
90th Percentile £57.50 £48.75 £57.50
UK median hourly rate £49.50 £37.50 £13.50
% change year-on-year +32.00% +177.78% -

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 19,717 17,870 22,541
As % of all contract IT jobs advertised in England 20.85% 20.42% 22.17%
Number of daily rates quoted 12,403 11,320 14,358
England median daily rate £438 £425 £400
Median daily rate % change year-on-year +2.94% +6.25% +6.67%
10th Percentile £185 £200 £213
90th Percentile £613 £588 £575
UK median daily rate £425 £425 £400
% change year-on-year - +6.25% +6.67%
Number of hourly rates quoted 1,361 1,056 1,227
England median hourly rate £17.50 £16.64 £16.50
Median hourly rate % change year-on-year +5.17% +0.85% +2.10%
10th Percentile £11.17 £10.50 £10.63
90th Percentile £47.83 £47.50 £45.00
UK median hourly rate £17.50 £16.50 £16.50
% change year-on-year +6.06% - +2.10%

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 17 July 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 17 July 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 17 July 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 -28 367 £550 +10.00% 76
South East -61 86 £475 - 50
North of England +11 71 £444 +4.41% 28
North West -12 37 £475 +8.57% 15
East of England +27 34 £425 -19.05% 9
South West -19 32 £400 -13.51% 12
Yorkshire +5 28 £420 - 3
Midlands -41 21 £475 +2.70% 11
East Midlands +12 15 £500 +25.00% 4
North East 0 8 £600 - 10
West Midlands -63 6 £450 -4.46% 6
CentOS
UK

For the 6 months to 17 July 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.

1 611 (100.00%) Linux
2 362 (59.25%) DevOps
3 294 (48.12%) Red Hat Enterprise Linux
4 287 (46.97%) Jenkins
5 257 (42.06%) Red Hat
6 255 (41.73%) Python
7 248 (40.59%) Docker
8 243 (39.77%) Ansible
9 231 (37.81%) Puppet
10 227 (37.15%) Amazon AWS
11 219 (35.84%) Bash Shell
12 209 (34.21%) Git (software)
13 207 (33.88%) Agile Software Development
14 179 (29.30%) Ubuntu
15 173 (28.31%) Terraform
16 167 (27.33%) Windows
17 164 (26.84%) Security Cleared
18 156 (25.53%) Kubernetes
19 154 (25.20%) Continuous Integration
20 145 (23.73%) VMware
21 144 (23.57%) Configuration Management
22 142 (23.24%) Java
23 109 (17.84%) SC Cleared
24 91 (14.89%) Opscode Chef
25 90 (14.73%) Splunk
25 90 (14.73%) Windows Server
25 90 (14.73%) Open Source
25 90 (14.73%) Microsoft Azure
26 86 (14.08%) Firewall
27 85 (13.91%) Unix

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 83 (13.58%) Apache
2 46 (7.53%) Tomcat
3 45 (7.36%) Confluence
3 45 (7.36%) Elasticsearch
3 45 (7.36%) OpenStack
4 43 (7.04%) nginx
5 26 (4.26%) JBoss
6 16 (2.62%) Apache Spark
7 13 (2.13%) Jetty
8 9 (1.47%) IIS
9 8 (1.31%) Oracle SOA Suite
9 8 (1.31%) WebLogic
10 6 (0.98%) WebSphere
11 5 (0.82%) lighttpd
11 5 (0.82%) Mongrel
11 5 (0.82%) Mule ESB
11 5 (0.82%) WildFly
12 3 (0.49%) Oracle Self-Service HR
13 2 (0.33%) Apache Pig
13 2 (0.33%) Apache Solr
Applications
1 4 (0.65%) Microsoft Office
2 3 (0.49%) Microsoft Excel
3 2 (0.33%) HipChat
Business Applications
1 3 (0.49%) Towers Watson Igloo
2 2 (0.33%) BusinessWorks
3 1 (0.16%) Distributed Ledger
Cloud Services
1 227 (37.15%) Amazon AWS
2 90 (14.73%) Microsoft Azure
3 62 (10.15%) GitHub
4 46 (7.53%) Amazon EC2
4 46 (7.53%) AWS CloudFormation
5 38 (6.22%) Google Cloud Platform
6 33 (5.40%) Virtual Private Cloud
7 28 (4.58%) Amazon CloudWatch
8 25 (4.09%) Amazon S3
9 22 (3.60%) Datadog
10 13 (2.13%) Cloud Computing
11 11 (1.80%) Amazon ELB
12 7 (1.15%) AWS Lambda
12 7 (1.15%) PaaS
12 7 (1.15%) Serverless
13 5 (0.82%) Google App Engine
13 5 (0.82%) Google Tag Manager
13 5 (0.82%) Office 365
13 5 (0.82%) Rackspace Cloud
13 5 (0.82%) Sumo Logic
Communications & Networking
1 86 (14.08%) Firewall
2 44 (7.20%) DNS
2 44 (7.20%) TCP/IP
3 31 (5.07%) VPN
4 28 (4.58%) HTTP
5 23 (3.76%) SSH
6 19 (3.11%) Intrusion Detection
7 18 (2.95%) DHCP
7 18 (2.95%) SAN
8 14 (2.29%) SSL
9 11 (1.80%) OpenLDAP
10 10 (1.64%) LAN
11 9 (1.47%) VLAN
11 9 (1.47%) WAN
12 8 (1.31%) Cisco Nexus
12 8 (1.31%) Internet
12 8 (1.31%) Kerberos
13 7 (1.15%) Fibre Channel
13 7 (1.15%) HTTPS
13 7 (1.15%) Reverse Proxy
Database & Business Intelligence
1 82 (13.42%) PostgreSQL
2 75 (12.27%) MySQL
3 71 (11.62%) MongoDB
4 45 (7.36%) Hadoop
4 45 (7.36%) SQL Server
5 37 (6.06%) Amazon RDS
6 34 (5.56%) NoSQL
7 32 (5.24%) Big Data
8 27 (4.42%) Apache Cassandra
9 23 (3.76%) SQL Server 2016
10 15 (2.45%) HBase
11 11 (1.80%) Relational Database
12 10 (1.64%) Apache Hive
12 10 (1.64%) Redis
13 9 (1.47%) Data Lake
14 8 (1.31%) Sqoop
15 7 (1.15%) MarkLogic
15 7 (1.15%) Oracle Database
15 7 (1.15%) RDBMS
16 6 (0.98%) Impala
Development Applications
1 287 (46.97%) Jenkins
2 209 (34.21%) Git (software)
3 70 (11.46%) JIRA
4 60 (9.82%) Sonatype Nexus
5 59 (9.66%) Vagrant
6 54 (8.84%) Maven
7 48 (7.86%) Atlassian Bamboo
8 40 (6.55%) GitLab
9 34 (5.56%) Bitbucket
10 30 (4.91%) Artifactory
11 24 (3.93%) JUnit
12 19 (3.11%) Subversion
12 19 (3.11%) Travis CI
13 17 (2.78%) TeamCity
14 15 (2.45%) Cucumber
15 14 (2.29%) Selenium
16 13 (2.13%) EasyMock
16 13 (2.13%) Mercurial
17 12 (1.96%) Ant
18 10 (1.64%) Gerrit
General
1 20 (3.27%) Finance
2 19 (3.11%) Telecoms
3 13 (2.13%) Banking
4 10 (1.64%) Legal
5 7 (1.15%) Games
6 5 (0.82%) Manufacturing
6 5 (0.82%) Marketing
6 5 (0.82%) Retail
7 4 (0.65%) Automotive
7 4 (0.65%) Investment Banking
8 3 (0.49%) Electronics
9 2 (0.33%) Advertising
9 2 (0.33%) Law
10 1 (0.16%) Billing
10 1 (0.16%) Pharmaceutical
10 1 (0.16%) Publishing
Job Titles
1 268 (43.86%) DevOps Engineer
2 74 (12.11%) Linux Engineer
3 66 (10.80%) Administrator
4 63 (10.31%) Developer
5 62 (10.15%) AWS DevOps
6 59 (9.66%) Systems Administrator
7 49 (8.02%) AWS Engineer
8 45 (7.36%) AWS DevOps Engineer
9 40 (6.55%) Linux Administrator
9 40 (6.55%) Linux Systems Administrator
9 40 (6.55%) Linux/Unix DevOps
10 39 (6.38%) Consultant
11 33 (5.40%) Senior DevOps
12 31 (5.07%) Linux DevOps Engineer
12 31 (5.07%) Senior DevOps Engineer
13 30 (4.91%) Unix Administrator
14 28 (4.58%) Unix Systems Administrator
15 27 (4.42%) Infrastructure Engineer
16 23 (3.76%) Systems Engineer
17 22 (3.60%) DevOps Consultant
Libraries, Frameworks & Software Standards
1 71 (11.62%) Elastic Stack
2 63 (10.31%) Kafka
3 43 (7.04%) Web Services
4 30 (4.91%) LDAP
5 27 (4.42%) Spring
6 25 (4.09%) ActiveMQ
6 25 (4.09%) LAMP
7 22 (3.60%) Node.js
7 22 (3.60%) RabbitMQ
8 20 (3.27%) JSON
9 18 (2.95%) REST
10 17 (2.78%) XML
11 15 (2.45%) HTML
11 15 (2.45%) LAPP Stack
11 15 (2.45%) RESTful
12 13 (2.13%) EJB
12 13 (2.13%) JSF
12 13 (2.13%) SOAP
13 12 (1.96%) HTML5
14 11 (1.80%) CSS
Miscellaneous
1 35 (5.73%) Analytical Skills
1 35 (5.73%) Device Driver
1 35 (5.73%) Linux Command Line
2 25 (4.09%) Management Information System
3 23 (3.76%) Replication
4 20 (3.27%) Clustering
4 20 (3.27%) Data Centre
5 18 (2.95%) Public Cloud
6 15 (2.45%) Wiki
7 13 (2.13%) Private Cloud
8 11 (1.80%) Greenfield Project
9 9 (1.47%) Algorithms
9 9 (1.47%) Self-Motivation
10 8 (1.31%) Computer Science
10 8 (1.31%) Freedom of Information
10 8 (1.31%) Freedom of Information Act
11 7 (1.15%) Video on Demand
12 5 (0.82%) Mainframe
12 5 (0.82%) User Experience
13 4 (0.65%) Mobile App
Operating Systems
1 611 (100.00%) Linux
2 294 (48.12%) Red Hat Enterprise Linux
3 179 (29.30%) Ubuntu
4 167 (27.33%) Windows
5 90 (14.73%) Windows Server
6 85 (13.91%) Unix
7 38 (6.22%) Solaris
8 35 (5.73%) Debian
8 35 (5.73%) Windows Server 2008
9 28 (4.58%) Windows 10
10 27 (4.42%) Windows Server 2012
11 23 (3.76%) DC/OS
12 16 (2.62%) CoreOS
12 16 (2.62%) SUSE
13 15 (2.45%) AIX
14 10 (1.64%) HPUX
15 9 (1.47%) Fedora
15 9 (1.47%) Windows Server 2003
16 8 (1.31%) VMS
17 7 (1.15%) Windows 7
Processes & Methodologies
1 362 (59.25%) DevOps
2 207 (33.88%) Agile Software Development
3 154 (25.20%) Continuous Integration
4 144 (23.57%) Configuration Management
5 90 (14.73%) Open Source
6 75 (12.27%) Scrum
7 61 (9.98%) Problem-Solving
8 57 (9.33%) Immutable Infrastructure
9 54 (8.84%) Test Automation
10 43 (7.04%) Continuous Delivery
11 35 (5.73%) SDLC
12 33 (5.40%) Disaster Recovery
12 33 (5.40%) High Availability
12 33 (5.40%) ITIL
13 28 (4.58%) Deployment Automation
13 28 (4.58%) Load Balancing
14 27 (4.42%) Mentoring
14 27 (4.42%) Software Engineering
15 25 (4.09%) Migration
16 23 (3.76%) OO
Programming Languages
1 255 (41.73%) Python
2 219 (35.84%) Bash Shell
3 142 (23.24%) Java
4 82 (13.42%) SQL
5 69 (11.29%) Ruby
5 69 (11.29%) Shell Script
6 64 (10.47%) PowerShell
7 63 (10.31%) Perl
8 48 (7.86%) Groovy
9 45 (7.36%) Go
10 31 (5.07%) JavaScript
11 25 (4.09%) PHP
12 22 (3.60%) C++
13 20 (3.27%) Scala
14 13 (2.13%) PL/SQL
15 10 (1.64%) C
16 9 (1.47%) Bourne shell
17 8 (1.31%) AWK
18 7 (1.15%) Korn
19 6 (0.98%) C#
Qualifications
1 164 (26.84%) Security Cleared
2 109 (17.84%) SC Cleared
3 46 (7.53%) DV Cleared
4 10 (1.64%) Cisco Certification
4 10 (1.64%) Degree
5 8 (1.31%) CCNA
5 8 (1.31%) RHCE
6 7 (1.15%) CISSP
7 6 (0.98%) Microsoft Certification
7 6 (0.98%) RHCSA
8 4 (0.65%) AWS Certification
8 4 (0.65%) BPSS Clearance
8 4 (0.65%) CISMP
8 4 (0.65%) OCA
8 4 (0.65%) OCP
8 4 (0.65%) Oracle Certification
8 4 (0.65%) VCAP
8 4 (0.65%) VCDX
9 3 (0.49%) MCSA
10 2 (0.33%) PMP
Quality Assurance & Compliance
1 32 (5.24%) QA
2 14 (2.29%) GCP
3 5 (0.82%) ISO/IEC 27001
3 5 (0.82%) Sarbanes-Oxley
3 5 (0.82%) SLA
3 5 (0.82%) TickIT
4 3 (0.49%) JSP 440
5 2 (0.33%) MiFID
5 2 (0.33%) PMO
6 1 (0.16%) Data Quality
6 1 (0.16%) Disclosure Scotland
System Software
1 248 (40.59%) Docker
2 72 (11.78%) VMware Infrastructure
3 53 (8.67%) Active Directory
4 47 (7.69%) VMware ESXi
5 42 (6.87%) Virtual Machines
6 39 (6.38%) Hyper-V
7 28 (4.58%) VirtualBox
8 20 (3.27%) KVM
8 20 (3.27%) Xen
9 17 (2.78%) vSphere
10 16 (2.62%) Apache ZooKeeper
11 12 (1.96%) vCloud
12 11 (1.80%) iptables
12 11 (1.80%) Squid
13 10 (1.64%) LXC
14 9 (1.47%) GlusterFS
14 9 (1.47%) HDFS
14 9 (1.47%) Postfix
14 9 (1.47%) Varnish
15 8 (1.31%) Apache Flume
Systems Management
1 243 (39.77%) Ansible
2 231 (37.81%) Puppet
3 173 (28.31%) Terraform
4 156 (25.53%) Kubernetes
5 91 (14.89%) Opscode Chef
6 72 (11.78%) Nagios
7 57 (9.33%) Packer
8 46 (7.53%) Grafana
9 41 (6.71%) Prometheus
10 37 (6.06%) Docker Swarm
10 37 (6.06%) Icinga
11 36 (5.89%) Kibana
12 33 (5.40%) logstash
13 27 (4.42%) ZABBIX
14 25 (4.09%) Consul
15 23 (3.76%) vCenter Server
16 22 (3.60%) Galera Cluster
17 20 (3.27%) HAProxy
17 20 (3.27%) SELinux
18 16 (2.62%) Salt
Vendors
1 257 (42.06%) Red Hat
2 145 (23.73%) VMware
3 90 (14.73%) Splunk
4 72 (11.78%) Google
5 57 (9.33%) Oracle
6 49 (8.02%) Microsoft
7 45 (7.36%) Cisco
8 34 (5.56%) Hortonworks
9 28 (4.58%) SaltStack
10 27 (4.42%) New Relic
11 26 (4.26%) HP
12 24 (3.93%) Cloudera
13 22 (3.60%) NetApp
14 18 (2.95%) IBM
15 15 (2.45%) Atlassian
16 13 (2.13%) Black Duck
17 12 (1.96%) Juniper
17 12 (1.96%) SolarWinds
18 9 (1.47%) Capita
19 8 (1.31%) EMC