Period
to 23 May 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 23 May 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
23 May 2018
Same period 2017 Same period 2016
Rank 350 333 397
Rank change year-on-year -17 +64 +32
Contract jobs citing CentOS 643 612 561
As % of all contract IT jobs advertised in England 0.70% 0.73% 0.58%
As % of the Operating Systems category 3.36% 3.61% 2.63%
Number of daily rates quoted 439 451 404
England median daily rate £500 £485 £450
Median daily rate % change year-on-year +3.09% +7.78% +11.80%
10th Percentile £368 £325 £325
90th Percentile £638 £613 £575
UK median daily rate £500 £475 £450
% change year-on-year +5.26% +5.56% +6.19%
Number of hourly rates quoted 3 7 5
England median hourly rate £49.50 £17.50 £50.00
Median hourly rate % change year-on-year +182.86% -65.00% +5.26%
10th Percentile £22.95 £14.13 £23.95
90th Percentile £53.05 £49.25 £55.50
UK median hourly rate £49.50 £17.50 £50.00
% change year-on-year +182.86% -65.00% +5.26%

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 19,126 16,976 21,307
As % of all contract IT jobs advertised in England 20.76% 20.35% 21.94%
Number of daily rates quoted 12,163 10,805 13,334
England median daily rate £445 £425 £400
Median daily rate % change year-on-year +4.71% +6.25% +6.67%
10th Percentile £185 £200 £210
90th Percentile £615 £588 £575
UK median daily rate £425 £425 £400
% change year-on-year - +6.25% +6.67%
Number of hourly rates quoted 1,235 1,004 1,285
England median hourly rate £17.50 £16.75 £17.00
Median hourly rate % change year-on-year +4.48% -1.47% +5.20%
10th Percentile £11.17 £10.50 £10.63
90th Percentile £47.50 £47.50 £46.00
UK median hourly rate £17.00 £16.50 £17.00
% change year-on-year +3.03% -2.94% +5.20%

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 23 May 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 23 May 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 23 May 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 -22 374 £525 +5.00% 79
South East -50 92 £540 +8.00% 45
North of England +19 69 £420 -1.18% 29
South West +38 57 £500 +7.53% 23
North West -4 39 £433 +8.13% 20
Midlands -40 32 £500 +8.70% 11
Yorkshire -1 27 £420 -1.18% 6
East Midlands +26 25 £500 +33.33% 4
East of England +7 19 £419 -20.24% 11
West Midlands -67 7 £413 -11.62% 7
North East - 3 £313 - 3
CentOS
UK

For the 6 months to 23 May 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.

1 643 (100.00%) Linux
2 404 (62.83%) DevOps
3 330 (51.32%) Jenkins
4 314 (48.83%) Red Hat Enterprise Linux
5 272 (42.30%) Docker
6 271 (42.15%) Red Hat
7 266 (41.37%) Ansible
8 265 (41.21%) Python
9 250 (38.88%) Git (software)
10 249 (38.72%) Bash Shell
11 245 (38.10%) Amazon AWS
12 241 (37.48%) Agile Software Development
13 234 (36.39%) Puppet
14 189 (29.39%) Security Cleared
15 183 (28.46%) Ubuntu
16 177 (27.53%) Continuous Integration
17 169 (26.28%) Terraform
18 163 (25.35%) Java
19 157 (24.42%) Kubernetes
20 156 (24.26%) Windows
21 146 (22.71%) VMware
22 135 (21.00%) Configuration Management
23 122 (18.97%) SC Cleared
24 107 (16.64%) Unix
25 105 (16.33%) Firewall
26 103 (16.02%) Scrum
26 103 (16.02%) Microsoft Azure
27 100 (15.55%) PostgreSQL
27 100 (15.55%) Splunk
28 99 (15.40%) Opscode Chef

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 90 (14.00%) Apache
2 77 (11.98%) Tomcat
3 64 (9.95%) Confluence
4 62 (9.64%) nginx
5 48 (7.47%) Elasticsearch
6 35 (5.44%) Apache Spark
7 32 (4.98%) OpenStack
8 26 (4.04%) JBoss
9 21 (3.27%) Jetty
10 9 (1.40%) IIS
10 9 (1.40%) WebLogic
11 8 (1.24%) Mule ESB
11 8 (1.24%) WildFly
12 6 (0.93%) Oracle SOA Suite
12 6 (0.93%) WebSphere
13 5 (0.78%) Mongrel
14 4 (0.62%) ArcGIS
15 3 (0.47%) Oracle Self-Service HR
16 2 (0.31%) Apache Pig
16 2 (0.31%) MS Exchange
Applications
1 3 (0.47%) Microsoft Excel
2 2 (0.31%) Microsoft Office
3 1 (0.16%) HipChat
Business Applications
1 2 (0.31%) BusinessWorks
Cloud Services
1 245 (38.10%) Amazon AWS
2 103 (16.02%) Microsoft Azure
3 52 (8.09%) GitHub
4 42 (6.53%) AWS CloudFormation
5 39 (6.07%) Google Cloud Platform
6 38 (5.91%) Amazon EC2
7 36 (5.60%) Amazon CloudWatch
8 34 (5.29%) Virtual Private Cloud
9 24 (3.73%) Amazon S3
9 24 (3.73%) Datadog
10 19 (2.95%) Google Tag Manager
11 17 (2.64%) Amazon ELB
12 16 (2.49%) Cloud Computing
13 14 (2.18%) PaaS
14 9 (1.40%) AWS Lambda
14 9 (1.40%) Serverless
15 8 (1.24%) Azure Active Directory
16 7 (1.09%) AWS CloudTrail
16 7 (1.09%) OpenShift
17 5 (0.78%) Sumo Logic
Communications & Networking
1 105 (16.33%) Firewall
2 47 (7.31%) VPN
3 45 (7.00%) TCP/IP
4 37 (5.75%) DNS
5 32 (4.98%) HTTP
6 24 (3.73%) Network Security
7 23 (3.58%) Kerberos
8 19 (2.95%) SSH
9 18 (2.80%) OpenLDAP
10 16 (2.49%) Intrusion Detection
11 13 (2.02%) DHCP
12 11 (1.71%) Internet
12 11 (1.71%) SMTP
13 10 (1.56%) Reverse Proxy
13 10 (1.56%) SAN
13 10 (1.56%) SSL
14 7 (1.09%) FTP
15 6 (0.93%) LAN
15 6 (0.93%) VLAN
16 5 (0.78%) IMAP
Database & Business Intelligence
1 100 (15.55%) PostgreSQL
2 92 (14.31%) MySQL
3 84 (13.06%) Hadoop
4 74 (11.51%) MongoDB
5 64 (9.95%) SQL Server
6 52 (8.09%) Big Data
7 36 (5.60%) Amazon RDS
8 31 (4.82%) NoSQL
9 30 (4.67%) Apache Hive
10 28 (4.35%) HBase
11 25 (3.89%) Apache Cassandra
12 24 (3.73%) SQL Server 2016
12 24 (3.73%) Sqoop
13 23 (3.58%) Data Lake
14 22 (3.42%) Impala
15 10 (1.56%) Relational Database
16 9 (1.40%) Oracle Database
16 9 (1.40%) Redis
17 8 (1.24%) DB2
17 8 (1.24%) SQL Server 2012
Development Applications
1 330 (51.32%) Jenkins
2 250 (38.88%) Git (software)
3 89 (13.84%) JIRA
4 81 (12.60%) Maven
5 76 (11.82%) Sonatype Nexus
6 59 (9.18%) Vagrant
7 52 (8.09%) Bitbucket
8 42 (6.53%) Atlassian Bamboo
9 37 (5.75%) Artifactory
10 35 (5.44%) JUnit
11 27 (4.20%) GitLab
12 23 (3.58%) Subversion
13 22 (3.42%) Gerrit
14 21 (3.27%) TeamCity
15 19 (2.95%) EasyMock
16 18 (2.80%) Gradle
17 17 (2.64%) Mercurial
17 17 (2.64%) Travis CI
18 13 (2.02%) Ant
19 12 (1.87%) Cucumber
General
1 19 (2.95%) Finance
2 17 (2.64%) Telecoms
3 11 (1.71%) Banking
4 8 (1.24%) Legal
5 7 (1.09%) Games
6 6 (0.93%) Retail
7 4 (0.62%) Investment Banking
8 3 (0.47%) Marketing
9 2 (0.31%) Law
9 2 (0.31%) Manufacturing
9 2 (0.31%) Publishing
10 1 (0.16%) Billing
10 1 (0.16%) Electronics
Job Titles
1 302 (46.97%) DevOps Engineer
2 84 (13.06%) Linux Engineer
3 73 (11.35%) Developer
4 66 (10.26%) AWS DevOps
5 59 (9.18%) Administrator
6 58 (9.02%) Linux/Unix DevOps
7 51 (7.93%) AWS Engineer
8 50 (7.78%) Consultant
9 46 (7.15%) Systems Administrator
10 45 (7.00%) AWS DevOps Engineer
10 45 (7.00%) Linux DevOps Engineer
11 35 (5.44%) Linux Administrator
11 35 (5.44%) Senior DevOps
11 35 (5.44%) Senior DevOps Engineer
12 34 (5.29%) Linux Systems Administrator
13 30 (4.67%) DevOps Consultant
14 25 (3.89%) Java Developer
14 25 (3.89%) Kubernetes Engineer
15 24 (3.73%) Infrastructure Engineer
16 21 (3.27%) AWS Consultant
Libraries, Frameworks & Software Standards
1 79 (12.29%) Elastic Stack
2 69 (10.73%) Kafka
3 67 (10.42%) Web Services
4 40 (6.22%) LAMP
5 39 (6.07%) LDAP
6 35 (5.44%) RESTful
7 32 (4.98%) SOAP
8 31 (4.82%) Spring
9 30 (4.67%) Node.js
10 29 (4.51%) ActiveMQ
11 23 (3.58%) REST
12 22 (3.42%) LAPP Stack
13 21 (3.27%) RabbitMQ
14 20 (3.11%) EJB
15 19 (2.95%) JSF
16 18 (2.80%) LEMP Stack
17 15 (2.33%) JSON
17 15 (2.33%) YAML
18 14 (2.18%) HTML
18 14 (2.18%) MCollective
Miscellaneous
1 40 (6.22%) Linux Command Line
2 36 (5.60%) Public Cloud
3 33 (5.13%) Analytical Skills
3 33 (5.13%) Greenfield Project
4 29 (4.51%) Device Driver
5 22 (3.42%) Replication
6 21 (3.27%) Clustering
6 21 (3.27%) Wiki
7 19 (2.95%) Management Information System
8 12 (1.87%) Data Centre
9 11 (1.71%) Video on Demand
10 9 (1.40%) Algorithms
10 9 (1.40%) Computer Science
11 8 (1.24%) Life Science
12 7 (1.09%) Self-Motivation
13 6 (0.93%) Mainframe
13 6 (0.93%) Private Cloud
14 5 (0.78%) Enterprise Software
15 4 (0.62%) Fintech
15 4 (0.62%) Freedom of Information Act
Operating Systems
1 643 (100.00%) Linux
2 314 (48.83%) Red Hat Enterprise Linux
3 183 (28.46%) Ubuntu
4 156 (24.26%) Windows
5 107 (16.64%) Unix
6 94 (14.62%) Windows Server
7 42 (6.53%) Debian
8 34 (5.29%) Windows Server 2008
9 32 (4.98%) Windows Server 2012
10 22 (3.42%) DC/OS
10 22 (3.42%) Solaris
10 22 (3.42%) Windows 10
11 18 (2.80%) CoreOS
12 13 (2.02%) Windows Server 2003
13 10 (1.56%) HPUX
13 10 (1.56%) SUSE
14 8 (1.24%) Fedora
14 8 (1.24%) VMS
15 6 (0.93%) AIX
15 6 (0.93%) Android
Processes & Methodologies
1 404 (62.83%) DevOps
2 241 (37.48%) Agile Software Development
3 177 (27.53%) Continuous Integration
4 135 (21.00%) Configuration Management
5 103 (16.02%) Scrum
6 70 (10.89%) Open Source
7 60 (9.33%) Test Automation
8 57 (8.86%) Problem-Solving
9 51 (7.93%) Continuous Delivery
10 47 (7.31%) Immutable Infrastructure
11 43 (6.69%) Load Balancing
12 34 (5.29%) High Availability
13 33 (5.13%) Kanban
14 31 (4.82%) ITIL
15 30 (4.67%) Analytics
16 29 (4.51%) Mentoring
17 28 (4.35%) Microservices
17 28 (4.35%) OO
17 28 (4.35%) SDLC
18 26 (4.04%) TDD
Programming Languages
1 265 (41.21%) Python
2 249 (38.72%) Bash Shell
3 163 (25.35%) Java
4 90 (14.00%) Ruby
5 65 (10.11%) Shell Script
5 65 (10.11%) SQL
6 64 (9.95%) Groovy
6 64 (9.95%) PowerShell
7 62 (9.64%) Perl
8 44 (6.84%) Go
9 34 (5.29%) Scala
10 27 (4.20%) JavaScript
11 22 (3.42%) PHP
12 20 (3.11%) C++
13 9 (1.40%) C
13 9 (1.40%) PL/SQL
14 6 (0.93%) Bourne shell
14 6 (0.93%) Dart
15 5 (0.78%) AWK
15 5 (0.78%) Korn
Qualifications
1 189 (29.39%) Security Cleared
2 122 (18.97%) SC Cleared
3 48 (7.47%) DV Cleared
4 10 (1.56%) Degree
5 8 (1.24%) CISSP
6 5 (0.78%) Cisco Certification
6 5 (0.78%) RHCE
7 4 (0.62%) CESG Certified Professional
7 4 (0.62%) CISMP
7 4 (0.62%) CLAS
8 3 (0.47%) AWS Certification
8 3 (0.47%) CCNA
8 3 (0.47%) Microsoft Certification
8 3 (0.47%) RHCSA
9 2 (0.31%) MCSA
9 2 (0.31%) OCA
9 2 (0.31%) OCP
9 2 (0.31%) Oracle Certification
9 2 (0.31%) PMI Certification
9 2 (0.31%) PMP
Quality Assurance & Compliance
1 23 (3.58%) QA
2 11 (1.71%) GCP
3 6 (0.93%) Sarbanes-Oxley
3 6 (0.93%) SLA
4 5 (0.78%) TickIT
5 4 (0.62%) JSP 440
5 4 (0.62%) RMADS
6 3 (0.47%) Disclosure Scotland
6 3 (0.47%) ISO/IEC 27001
6 3 (0.47%) PMO
7 2 (0.31%) MiFID
System Software
1 272 (42.30%) Docker
2 72 (11.20%) VMware Infrastructure
3 54 (8.40%) VMware ESXi
4 48 (7.47%) Active Directory
5 41 (6.38%) Hyper-V
6 40 (6.22%) Virtual Machines
7 27 (4.20%) HDFS
8 25 (3.89%) VirtualBox
9 22 (3.42%) Apache Flume
10 19 (2.95%) Xen
11 16 (2.49%) KVM
12 15 (2.33%) Squid
13 13 (2.02%) Apache ZooKeeper
14 10 (1.56%) LXC
14 10 (1.56%) vSphere
15 8 (1.24%) iptables
16 7 (1.09%) GlusterFS
16 7 (1.09%) vCloud
17 6 (0.93%) NFS
17 6 (0.93%) XenServer
Systems Management
1 266 (41.37%) Ansible
2 234 (36.39%) Puppet
3 169 (26.28%) Terraform
4 157 (24.42%) Kubernetes
5 99 (15.40%) Opscode Chef
6 67 (10.42%) Nagios
7 58 (9.02%) Packer
8 52 (8.09%) logstash
9 43 (6.69%) Grafana
10 40 (6.22%) Prometheus
11 37 (5.75%) Kibana
11 37 (5.75%) ZABBIX
12 35 (5.44%) Docker Swarm
13 30 (4.67%) Icinga
14 23 (3.58%) Galera Cluster
14 23 (3.58%) HAProxy
15 22 (3.42%) Oozie
16 20 (3.11%) Consul
17 19 (2.95%) vCenter Server
18 16 (2.49%) SELinux
Vendors
1 271 (42.15%) Red Hat
2 146 (22.71%) VMware
3 100 (15.55%) Splunk
4 75 (11.66%) Google
5 62 (9.64%) Oracle
6 57 (8.86%) Microsoft
7 43 (6.69%) Hortonworks
8 42 (6.53%) Cloudera
9 40 (6.22%) Cisco
10 27 (4.20%) New Relic
11 26 (4.04%) HP
12 24 (3.73%) Atlassian
12 24 (3.73%) SaltStack
13 22 (3.42%) MapR
14 21 (3.27%) NetApp
14 21 (3.27%) Salesforce.com
15 19 (2.95%) IBM
15 19 (2.95%) Talend
15 19 (2.95%) Tealium
16 13 (2.02%) ServiceNow