Period
to 20 November 2017

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 20 November 2017 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
20 Nov 2017
Same period 2016 Same period 2015
Rank 389 303 430
Rank change year-on-year -86 +127 -28
Contract jobs citing CentOS 567 798 531
As % of all contract IT jobs advertised in England 0.60% 0.83% 0.51%
As % of the Operating Systems category 2.88% 3.83% 2.35%
Number of daily rates quoted 413 560 340
England median daily rate £458 £463 £425
Median daily rate % change year-on-year -1.08% +8.82% +6.25%
10th Percentile £313 £313 £300
90th Percentile £588 £588 £550
UK median daily rate £455 £463 £425
% change year-on-year -1.62% +8.82% +6.25%
Number of hourly rates quoted 14 6 3
England median hourly rate £32.88 £14.75 £38.00
Median hourly rate % change year-on-year +122.88% -61.18% +102.67%
10th Percentile £17.00 £11.69 £34.80
90th Percentile £48.75 £38.25 £48.20
UK median hourly rate £32.88 £14.75 £38.00
% change year-on-year +122.88% -61.18% +102.67%

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 19716 20830 22634
As % of all contract IT jobs advertised in England 20.96% 21.56% 21.66%
Number of daily rates quoted 12689 13296 13488
England median daily rate £425 £410 £400
Median daily rate % change year-on-year +3.66% +2.50% +6.67%
10th Percentile £175 £200 £188
90th Percentile £600 £575 £572
UK median daily rate £425 £400 £390
% change year-on-year +6.25% +2.56% +4.00%
Number of hourly rates quoted 1197 1178 1836
England median hourly rate £17.50 £16.50 £16.50
Median hourly rate % change year-on-year +6.06% - +6.45%
10th Percentile £11.00 £10.75 £10.50
90th Percentile £47.83 £43.75 £42.25
UK median hourly rate £17.50 £16.29 £16.50
% change year-on-year +7.43% -1.27% +4.90%

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 20 November 2017.

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 20 November 2017.

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 20 November 2017. 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 -94 332 £491 -1.75% 54
South East -26 78 £425 -2.86% 22
North of England +1 63 £425 - 18
South West +30 48 £400 -11.11% 10
North West +17 38 £425 - 13
Midlands +13 27 £350 -15.66% 9
Yorkshire -20 24 £450 +5.88% 5
West Midlands +26 17 £425 -2.86% 6
East of England -16 17 £415 +10.67% 6
East Midlands -7 10 £290 -25.16% 3
North East +41 1 - -
CentOS
UK

For the 6 months to 20 November 2017, IT contractor jobs citing CentOS also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads across the England region with a requirement for CentOS.

1 567 (100.00%) Linux
2 316 (55.73%) DevOps
3 280 (49.38%) Red Hat
3 280 (49.38%) Red Hat Enterprise Linux
4 243 (42.86%) Amazon AWS
5 224 (39.51%) Bash Shell
6 221 (38.98%) Puppet
6 221 (38.98%) Python
7 207 (36.51%) Jenkins
8 179 (31.57%) Docker
9 173 (30.51%) VMware
10 170 (29.98%) Ubuntu
11 163 (28.75%) Git (software)
12 161 (28.40%) Agile Software Development
13 152 (26.81%) Ansible
14 148 (26.10%) Java
15 141 (24.87%) Configuration Management
16 118 (20.81%) Security Cleared
17 116 (20.46%) Continuous Integration
18 109 (19.22%) Windows
19 107 (18.87%) Terraform
20 105 (18.52%) DNS
21 100 (17.64%) Unix
22 99 (17.46%) Opscode Chef
23 95 (16.75%) Kubernetes
24 92 (16.23%) Tomcat
25 91 (16.05%) SC Cleared
26 88 (15.52%) Perl
27 85 (14.99%) MySQL
28 80 (14.11%) Ruby

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 92 (16.23%) Tomcat
2 66 (11.64%) Apache
3 57 (10.05%) Elasticsearch
4 43 (7.58%) Confluence
5 41 (7.23%) nginx
6 29 (5.11%) OpenStack
7 24 (4.23%) JBoss
8 22 (3.88%) Apache Spark
9 21 (3.70%) WebSphere
10 13 (2.29%) Apache Solr
10 13 (2.29%) MS Exchange
11 10 (1.76%) Jetty
12 9 (1.59%) Apache Pig
13 8 (1.41%) SAS
14 7 (1.23%) Cloud Foundry
14 7 (1.23%) IIS
15 6 (1.06%) ArcGIS
16 4 (0.71%) Adobe Experience Manager
16 4 (0.71%) Drupal
16 4 (0.71%) WordPress
Applications
1 8 (1.41%) Houdini
1 8 (1.41%) Maya
1 8 (1.41%) NUKE
1 8 (1.41%) Photoshop
2 1 (0.18%) HipChat
2 1 (0.18%) Microsoft Excel
2 1 (0.18%) MS Visio
2 1 (0.18%) Stata
Cloud Services
1 243 (42.86%) Amazon AWS
2 59 (10.41%) Amazon EC2
3 44 (7.76%) Microsoft Azure
4 41 (7.23%) Amazon S3
5 40 (7.05%) AWS CloudFormation
6 38 (6.70%) Virtual Private Cloud
7 24 (4.23%) AWS Lambda
7 24 (4.23%) Serverless
8 23 (4.06%) Amazon CloudWatch
9 20 (3.53%) Amazon ELB
10 19 (3.35%) GitHub
11 17 (3.00%) Cloud Computing
11 17 (3.00%) Route 53
12 15 (2.65%) Office 365
13 13 (2.29%) Google Cloud Platform
14 11 (1.94%) IaaS
15 7 (1.23%) Amazon SQS
16 6 (1.06%) Amazon EMR
16 6 (1.06%) SaaS
17 4 (0.71%) CloudFront
Communications & Networking
1 105 (18.52%) DNS
2 76 (13.40%) Firewall
3 44 (7.76%) DHCP
4 43 (7.58%) VPN
5 38 (6.70%) HTTP
6 36 (6.35%) LAN
6 36 (6.35%) WAN
7 34 (6.00%) LDAP
7 34 (6.00%) SAN
8 28 (4.94%) SSL
8 28 (4.94%) TCP/IP
9 23 (4.06%) OpenLDAP
10 20 (3.53%) SMTP
11 19 (3.35%) Network Security
12 17 (3.00%) SSH
13 16 (2.82%) Internet
14 15 (2.65%) OpenVPN
15 13 (2.29%) NetScaler
15 13 (2.29%) Wireless
16 11 (1.94%) Kerberos
Database & Business Intelligence
1 85 (14.99%) MySQL
2 65 (11.46%) MongoDB
3 53 (9.35%) PostgreSQL
4 39 (6.88%) Hadoop
5 37 (6.53%) Big Data
6 29 (5.11%) NoSQL
7 28 (4.94%) Apache Cassandra
8 26 (4.59%) Amazon RDS
9 25 (4.41%) DB2
9 25 (4.41%) Relational Database
10 20 (3.53%) Redis
11 18 (3.17%) Apache Hive
12 13 (2.29%) RDBMS
13 12 (2.12%) SQL Server
14 11 (1.94%) Amazon DynamoDB
15 10 (1.76%) Impala
15 10 (1.76%) Riak
16 9 (1.59%) Data Mining
16 9 (1.59%) Data Warehouse
16 9 (1.59%) MarkLogic
Development Applications
1 207 (36.51%) Jenkins
2 163 (28.75%) Git (software)
3 77 (13.58%) Maven
4 53 (9.35%) JIRA
5 44 (7.76%) Sonatype Nexus
6 27 (4.76%) GitLab
7 26 (4.59%) Bitbucket
7 26 (4.59%) Vagrant
8 24 (4.23%) Subversion
9 21 (3.70%) Atlassian Bamboo
10 19 (3.35%) SonarQube
11 17 (3.00%) JUnit
12 16 (2.82%) Ant
13 15 (2.65%) Liquibase
14 12 (2.12%) TeamCity
15 9 (1.59%) Team Foundation Server
16 8 (1.41%) JMeter
16 8 (1.41%) Selenium
17 5 (0.88%) Hudson
17 5 (0.88%) Mercurial
General
1 41 (7.23%) Finance
2 18 (3.17%) Retail
3 14 (2.47%) Telecoms
4 13 (2.29%) Games
5 6 (1.06%) Banking
6 5 (0.88%) Manufacturing
7 3 (0.53%) Advertising
7 3 (0.53%) Marketing
8 2 (0.35%) Electronics
8 2 (0.35%) Publishing
9 1 (0.18%) Aerospace
9 1 (0.18%) Billing
9 1 (0.18%) Financial Institution
9 1 (0.18%) Front Office
9 1 (0.18%) International Banking
9 1 (0.18%) Pharmaceutical
Job Titles
1 225 (39.68%) DevOps Engineer
2 115 (20.28%) Linux Engineer
3 103 (18.17%) Administrator
4 85 (14.99%) Linux/Unix DevOps
5 80 (14.11%) AWS DevOps
5 80 (14.11%) Linux Administrator
6 79 (13.93%) Systems Administrator
7 72 (12.70%) Linux DevOps Engineer
8 67 (11.82%) AWS Engineer
9 65 (11.46%) Linux Systems Administrator
10 53 (9.35%) AWS DevOps Engineer
11 51 (8.99%) Developer
12 39 (6.88%) Consultant
13 38 (6.70%) Systems Engineer
14 29 (5.11%) Senior DevOps
15 27 (4.76%) Linux Systems Engineer
16 24 (4.23%) DevOps Consultant
16 24 (4.23%) Windows Engineer
17 23 (4.06%) Senior DevOps Engineer
18 22 (3.88%) Infrastructure Engineer
Libraries, Frameworks & Software Standards
1 62 (10.93%) Elastic Stack
2 61 (10.76%) Web Services
3 32 (5.64%) MCollective
4 31 (5.47%) ActiveMQ
4 31 (5.47%) LAMP
5 30 (5.29%) REST
6 19 (3.35%) RabbitMQ
7 18 (3.17%) Hibernate
7 18 (3.17%) RESTful
7 18 (3.17%) Sensu
7 18 (3.17%) XML
8 17 (3.00%) Spring
9 16 (2.82%) Kafka
10 14 (2.47%) Java EE
10 14 (2.47%) Node.js
11 13 (2.29%) EJB
11 13 (2.29%) Struts
12 12 (2.12%) JSON
12 12 (2.12%) Natural Language Processing
12 12 (2.12%) SOAP
Miscellaneous
1 43 (7.58%) Linux Command Line
2 34 (6.00%) Replication
3 30 (5.29%) Analytical Skills
4 29 (5.11%) Clustering
4 29 (5.11%) Data Centre
5 27 (4.76%) Greenfield Project
6 25 (4.41%) Computer Science
6 25 (4.41%) Public Cloud
7 20 (3.53%) Device Driver
8 16 (2.82%) PKI
9 12 (2.12%) Algorithms
10 11 (1.94%) Derivative
11 10 (1.76%) Private Cloud
12 9 (1.59%) Fintech
13 7 (1.23%) Animation
13 7 (1.23%) Spread Betting
13 7 (1.23%) Video on Demand
14 5 (0.88%) Mobile App
15 3 (0.53%) Enterprise Storage
15 3 (0.53%) Hybrid Cloud
Operating Systems
1 567 (100.00%) Linux
2 280 (49.38%) Red Hat Enterprise Linux
3 170 (29.98%) Ubuntu
4 109 (19.22%) Windows
5 100 (17.64%) Unix
6 70 (12.35%) Windows Server
7 35 (6.17%) Debian
7 35 (6.17%) Windows Server 2012
8 30 (5.29%) Windows Server 2003
9 16 (2.82%) Solaris
10 13 (2.29%) Windows 7
11 11 (1.94%) Fedora
12 10 (1.76%) SUSE
13 7 (1.23%) Windows Server 2008
14 6 (1.06%) Mac OS X
15 5 (0.88%) CoreOS
16 4 (0.71%) Scientific Linux
17 3 (0.53%) Data ONTAP
17 3 (0.53%) VMS
18 2 (0.35%) Mac OS
Processes & Methodologies
1 316 (55.73%) DevOps
2 161 (28.40%) Agile Software Development
3 141 (24.87%) Configuration Management
4 116 (20.46%) Continuous Integration
5 72 (12.70%) Open Source
6 65 (11.46%) Scrum
7 57 (10.05%) Load Balancing
8 40 (7.05%) Mentoring
9 38 (6.70%) Continuous Delivery
10 37 (6.53%) Test Automation
11 33 (5.82%) Migration
11 33 (5.82%) Software Engineering
12 31 (5.47%) Continuous Deployment
13 27 (4.76%) Service Management
14 24 (4.23%) ITIL
15 23 (4.06%) Immutable Infrastructure
16 20 (3.53%) Patch Management
16 20 (3.53%) SDLC
17 19 (3.35%) Build Automation
17 19 (3.35%) Coaching
Programming Languages
1 224 (39.51%) Bash Shell
2 221 (38.98%) Python
3 148 (26.10%) Java
4 88 (15.52%) Perl
5 80 (14.11%) Ruby
6 51 (8.99%) PowerShell
6 51 (8.99%) SQL
7 48 (8.47%) Shell Script
8 37 (6.53%) JavaScript
9 31 (5.47%) Groovy
10 22 (3.88%) C
10 22 (3.88%) C++
10 22 (3.88%) PHP
11 21 (3.70%) Go
12 15 (2.65%) Scala
13 13 (2.29%) C#
14 11 (1.94%) Korn
15 10 (1.76%) R
16 7 (1.23%) AWK
16 7 (1.23%) Dart
Qualifications
1 118 (20.81%) Security Cleared
2 91 (16.05%) SC Cleared
3 33 (5.82%) Degree
4 12 (2.12%) RHCE
5 11 (1.94%) Computer Science Degree
6 10 (1.76%) Cisco Certification
7 9 (1.59%) CISSP
7 9 (1.59%) RHCSA
8 8 (1.41%) CESG Certified Professional
9 7 (1.23%) CLAS
10 6 (1.06%) CCNA
10 6 (1.06%) Microsoft Certification
11 5 (0.88%) CCNP
11 5 (0.88%) OCA
11 5 (0.88%) OCP
11 5 (0.88%) Oracle Certification
12 4 (0.71%) BPSS Clearance
12 4 (0.71%) CCSE
12 4 (0.71%) CISA
12 4 (0.71%) CISMP
Quality Assurance & Compliance
1 20 (3.53%) QA
2 18 (3.17%) Disclosure Scotland
3 6 (1.06%) JSP 440
3 6 (1.06%) SLA
4 5 (0.88%) ISO/IEC 27001
5 4 (0.71%) GDPR
5 4 (0.71%) PCI DSS
6 2 (0.35%) GCP
6 2 (0.35%) PMO
System Software
1 179 (31.57%) Docker
2 79 (13.93%) VMware Infrastructure
3 57 (10.05%) VMware ESXi
4 51 (8.99%) Active Directory
5 50 (8.82%) Hyper-V
6 40 (7.05%) KVM
7 35 (6.17%) Virtual Machines
8 24 (4.23%) Samba
9 19 (3.35%) Squid
10 18 (3.17%) vCloud
11 16 (2.82%) LXC
11 16 (2.82%) NFS
12 15 (2.65%) Postfix
13 11 (1.94%) iptables
14 10 (1.76%) Xen
15 6 (1.06%) GlusterFS
16 5 (0.88%) HDFS
16 5 (0.88%) Veritas Cluster Server
16 5 (0.88%) vSphere
17 3 (0.53%) VMware NSX
Systems Management
1 221 (38.98%) Puppet
2 152 (26.81%) Ansible
3 107 (18.87%) Terraform
4 99 (17.46%) Opscode Chef
5 95 (16.75%) Kubernetes
6 76 (13.40%) Nagios
7 47 (8.29%) logstash
8 39 (6.88%) ZABBIX
9 35 (6.17%) Packer
10 34 (6.00%) Grafana
11 29 (5.11%) Icinga
11 29 (5.11%) Prometheus
12 23 (4.06%) WMI
13 22 (3.88%) Kibana
14 20 (3.53%) Rsyslog
15 19 (3.35%) Galera Cluster
16 18 (3.17%) Rancher
16 18 (3.17%) yum
17 17 (3.00%) Docker Swarm
18 14 (2.47%) Sysdig
Vendors
1 280 (49.38%) Red Hat
2 173 (30.51%) VMware
3 71 (12.52%) Cisco
4 55 (9.70%) Splunk
5 32 (5.64%) Microsoft
6 31 (5.47%) Oracle
7 27 (4.76%) Juniper
8 24 (4.23%) Atlassian
8 24 (4.23%) SolarWinds
9 21 (3.70%) HP
9 21 (3.70%) IBM
10 20 (3.53%) Citrix
10 20 (3.53%) EMC
11 16 (2.82%) Cloudera
11 16 (2.82%) NetApp
12 15 (2.65%) Google
12 15 (2.65%) Sonatype
13 14 (2.47%) Dell
13 14 (2.47%) Extreme Networks
14 13 (2.29%) CheckPoint