Period
to 19 February 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 19 February 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
19 Feb 2018
Same period 2017 Same period 2016
Rank 345 331 392
Rank change year-on-year -14 +61 -12
Contract jobs citing CentOS 623 613 571
As % of all contract IT jobs advertised in England 0.67% 0.70% 0.58%
As % of the Operating Systems category 3.24% 3.36% 2.69%
Number of daily rates quoted 462 444 401
England median daily rate £475 £465 £450
Median daily rate % change year-on-year +2.15% +3.33% +5.88%
10th Percentile £313 £314 £319
90th Percentile £625 £588 £575
UK median daily rate £475 £463 £448
% change year-on-year +2.70% +3.35% +5.29%
Number of hourly rates quoted 9 5 6
England median hourly rate £27.50 £16.00 £50.00
Median hourly rate % change year-on-year +71.88% -68.00% +5.26%
10th Percentile £16.90 £14.13 £23.13
90th Percentile £43.90 £18.90 £52.50
UK median hourly rate £27.50 £16.00 £50.00
% change year-on-year +71.88% -68.00% +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 19,204 18,230 21,258
As % of all contract IT jobs advertised in England 20.77% 20.81% 21.44%
Number of daily rates quoted 12,413 11,598 12,815
England median daily rate £425 £413 £400
Median daily rate % change year-on-year +3.03% +3.13% +6.67%
10th Percentile £170 £200 £190
90th Percentile £620 £588 £575
UK median daily rate £425 £410 £400
% change year-on-year +3.66% +2.50% +6.67%
Number of hourly rates quoted 1,157 1,137 1,649
England median hourly rate £17.38 £16.50 £16.50
Median hourly rate % change year-on-year +5.30% - +3.13%
10th Percentile £11.00 £10.50 £10.50
90th Percentile £47.83 £45.25 £46.00
UK median hourly rate £17.07 £16.50 £16.50
% change year-on-year +3.44% - +3.13%

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 19 February 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 19 February 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 19 February 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 -41 363 £500 +5.26% 84
South East -36 85 £520 +9.47% 28
North of England +51 77 £420 -1.18% 23
South West +43 55 £450 +5.88% 25
North West +19 44 £420 +5.00% 15
Yorkshire +13 33 £425 -2.86% 8
Midlands +17 32 £400 -3.61% 22
East Midlands +17 20 £398 +6.00% 16
West Midlands +9 12 £400 -3.61% 6
East of England -10 11 £378 -14.93% 13
CentOS
UK

For the 6 months to 19 February 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.

1 623 (100.00%) Linux
2 373 (59.87%) DevOps
3 325 (52.17%) Red Hat Enterprise Linux
4 283 (45.43%) Red Hat
5 264 (42.38%) Bash Shell
6 257 (41.25%) Amazon AWS
7 251 (40.29%) Jenkins
8 233 (37.40%) Python
9 216 (34.67%) Docker
10 211 (33.87%) Ansible
11 209 (33.55%) Agile Software Development
12 207 (33.23%) Puppet
13 194 (31.14%) Git (software)
14 151 (24.24%) Java
15 145 (23.27%) Security Cleared
16 143 (22.95%) VMware
17 138 (22.15%) Ubuntu
18 132 (21.19%) Terraform
19 120 (19.26%) Windows
20 119 (19.10%) Continuous Integration
21 117 (18.78%) Kubernetes
22 113 (18.14%) Unix
23 108 (17.34%) Configuration Management
24 100 (16.05%) PostgreSQL
25 99 (15.89%) Firewall
26 97 (15.57%) Scrum
27 95 (15.25%) Opscode Chef
28 94 (15.09%) SC Cleared
29 93 (14.93%) Tomcat
30 89 (14.29%) MySQL

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 93 (14.93%) Tomcat
2 76 (12.20%) Elasticsearch
3 72 (11.56%) Apache
4 58 (9.31%) Confluence
5 50 (8.03%) nginx
6 40 (6.42%) Apache Spark
7 22 (3.53%) OpenStack
8 16 (2.57%) JBoss
9 15 (2.41%) Jetty
10 8 (1.28%) Apache Solr
11 6 (0.96%) Apache Pig
11 6 (0.96%) IIS
11 6 (0.96%) MS Exchange
12 5 (0.80%) Mule ESB
12 5 (0.80%) WebLogic
12 5 (0.80%) WildFly
12 5 (0.80%) WordPress
13 4 (0.64%) Alfresco
13 4 (0.64%) Drupal
13 4 (0.64%) Mule
Applications
1 3 (0.48%) Houdini
1 3 (0.48%) Maya
1 3 (0.48%) NUKE
1 3 (0.48%) Photoshop
2 1 (0.16%) HipChat
Cloud Services
1 257 (41.25%) Amazon AWS
2 71 (11.40%) Microsoft Azure
3 52 (8.35%) Amazon EC2
4 43 (6.90%) Virtual Private Cloud
5 39 (6.26%) Amazon S3
6 28 (4.49%) Amazon CloudWatch
7 25 (4.01%) Amazon ELB
8 24 (3.85%) AWS CloudFormation
9 21 (3.37%) Google Tag Manager
10 18 (2.89%) AWS Lambda
10 18 (2.89%) Serverless
11 17 (2.73%) Route 53
12 16 (2.57%) Google Cloud Platform
13 11 (1.77%) Cloud Computing
13 11 (1.77%) GitHub
13 11 (1.77%) PaaS
14 9 (1.44%) Azure Active Directory
15 7 (1.12%) Datadog
15 7 (1.12%) IaaS
15 7 (1.12%) OpenShift
Communications & Networking
1 99 (15.89%) Firewall
2 69 (11.08%) DNS
3 52 (8.35%) VPN
4 36 (5.78%) DHCP
5 33 (5.30%) Network Security
6 32 (5.14%) HTTP
7 31 (4.98%) SAN
8 30 (4.82%) TCP/IP
9 25 (4.01%) Kerberos
9 25 (4.01%) OpenLDAP
10 24 (3.85%) LAN
11 23 (3.69%) WAN
12 18 (2.89%) Internet
12 18 (2.89%) SSH
12 18 (2.89%) SSL
13 15 (2.41%) SMTP
14 13 (2.09%) NetScaler
15 12 (1.93%) OpenVPN
15 12 (1.93%) VoIP
16 11 (1.77%) Wireless
Database & Business Intelligence
1 100 (16.05%) PostgreSQL
2 89 (14.29%) MySQL
3 77 (12.36%) Hadoop
4 64 (10.27%) MongoDB
5 53 (8.51%) Big Data
6 41 (6.58%) SQL Server
7 35 (5.62%) Amazon RDS
7 35 (5.62%) Apache Hive
7 35 (5.62%) NoSQL
8 32 (5.14%) HBase
9 30 (4.82%) Apache Cassandra
10 28 (4.49%) Impala
11 26 (4.17%) Sqoop
12 25 (4.01%) Data Lake
13 19 (3.05%) DB2
14 18 (2.89%) Relational Database
15 16 (2.57%) Redis
16 13 (2.09%) RDBMS
17 8 (1.28%) BusinessObjects
18 7 (1.12%) Data Warehouse
Development Applications
1 251 (40.29%) Jenkins
2 194 (31.14%) Git (software)
3 87 (13.96%) Maven
4 78 (12.52%) JIRA
5 70 (11.24%) Sonatype Nexus
6 44 (7.06%) Bitbucket
7 28 (4.49%) Vagrant
8 27 (4.33%) JUnit
9 22 (3.53%) Atlassian Bamboo
10 19 (3.05%) Gerrit
10 19 (3.05%) GitLab
10 19 (3.05%) SonarQube
10 19 (3.05%) TeamCity
11 14 (2.25%) Subversion
12 13 (2.09%) Ant
12 13 (2.09%) Gradle
13 12 (1.93%) Artifactory
13 12 (1.93%) Liquibase
14 11 (1.77%) EasyMock
15 10 (1.61%) Mercurial
General
1 30 (4.82%) Finance
2 11 (1.77%) Retail
2 11 (1.77%) Telecoms
3 10 (1.61%) Games
4 5 (0.80%) Banking
4 5 (0.80%) Manufacturing
5 4 (0.64%) Marketing
6 2 (0.32%) Advertising
6 2 (0.32%) Billing
6 2 (0.32%) Legal
6 2 (0.32%) Publishing
7 1 (0.16%) Electronics
7 1 (0.16%) International Banking
7 1 (0.16%) Law
Job Titles
1 275 (44.14%) DevOps Engineer
2 102 (16.37%) Linux Engineer
3 91 (14.61%) AWS DevOps
4 80 (12.84%) Linux/Unix DevOps
5 75 (12.04%) AWS Engineer
6 69 (11.08%) Administrator
7 65 (10.43%) Linux DevOps Engineer
8 62 (9.95%) AWS DevOps Engineer
9 56 (8.99%) Developer
10 46 (7.38%) Linux Administrator
10 46 (7.38%) Systems Administrator
11 42 (6.74%) Consultant
12 38 (6.10%) Linux Systems Administrator
13 32 (5.14%) Senior DevOps
13 32 (5.14%) Senior DevOps Engineer
14 31 (4.98%) DevOps Consultant
15 30 (4.82%) Infrastructure Engineer
15 30 (4.82%) Windows Engineer
16 27 (4.33%) AWS Consultant
17 26 (4.17%) Kubernetes Engineer
Libraries, Frameworks & Software Standards
1 83 (13.32%) Web Services
2 65 (10.43%) Elastic Stack
3 46 (7.38%) LAMP
4 43 (6.90%) LDAP
5 42 (6.74%) Kafka
6 36 (5.78%) RESTful
6 36 (5.78%) SOAP
7 35 (5.62%) ActiveMQ
8 28 (4.49%) REST
9 24 (3.85%) MCollective
10 23 (3.69%) Node.js
11 22 (3.53%) Spring
12 21 (3.37%) LAPP Stack
13 19 (3.05%) RabbitMQ
14 18 (2.89%) LEMP Stack
15 15 (2.41%) Regular Expression
16 12 (1.93%) EJB
17 11 (1.77%) JSF
18 9 (1.44%) .NET
18 9 (1.44%) YAML
Miscellaneous
1 43 (6.90%) Greenfield Project
2 39 (6.26%) Public Cloud
3 38 (6.10%) Linux Command Line
4 34 (5.46%) Clustering
5 33 (5.30%) Replication
6 26 (4.17%) Data Centre
7 23 (3.69%) Device Driver
8 17 (2.73%) Analytical Skills
9 15 (2.41%) Video on Demand
10 11 (1.77%) Wiki
11 10 (1.61%) Computer Science
12 9 (1.44%) Algorithms
12 9 (1.44%) Derivative
12 9 (1.44%) Life Science
13 6 (0.96%) Enterprise Software
14 5 (0.80%) Management Information System
14 5 (0.80%) Private Cloud
15 4 (0.64%) Fintech
16 3 (0.48%) Grid Computing
16 3 (0.48%) Hybrid Cloud
Operating Systems
1 623 (100.00%) Linux
2 325 (52.17%) Red Hat Enterprise Linux
3 138 (22.15%) Ubuntu
4 120 (19.26%) Windows
5 113 (18.14%) Unix
6 80 (12.84%) Windows Server
7 58 (9.31%) Windows Server 2012
8 39 (6.26%) Windows Server 2003
9 24 (3.85%) Debian
10 19 (3.05%) Windows Server 2008
11 10 (1.61%) SUSE
12 8 (1.28%) Fedora
12 8 (1.28%) Windows 7
13 7 (1.12%) CoreOS
13 7 (1.12%) Solaris
14 6 (0.96%) Mac OS X
14 6 (0.96%) Scientific Linux
15 5 (0.80%) Windows 10
16 4 (0.64%) DC/OS
16 4 (0.64%) FreeBSD
Processes & Methodologies
1 373 (59.87%) DevOps
2 209 (33.55%) Agile Software Development
3 119 (19.10%) Continuous Integration
4 108 (17.34%) Configuration Management
5 97 (15.57%) Scrum
6 68 (10.91%) Open Source
7 58 (9.31%) Load Balancing
8 51 (8.19%) Continuous Delivery
9 42 (6.74%) Analytics
10 39 (6.26%) Mentoring
11 36 (5.78%) Migration
12 31 (4.98%) Immutable Infrastructure
13 28 (4.49%) Kanban
13 28 (4.49%) Service Management
14 25 (4.01%) ITIL
14 25 (4.01%) Test Automation
15 24 (3.85%) Data Strategy
15 24 (3.85%) High Availability
16 22 (3.53%) Vulnerability Scanning
17 21 (3.37%) Continuous Improvement
Programming Languages
1 264 (42.38%) Bash Shell
2 233 (37.40%) Python
3 151 (24.24%) Java
4 77 (12.36%) Ruby
5 67 (10.75%) PowerShell
6 64 (10.27%) Groovy
7 57 (9.15%) Perl
8 47 (7.54%) SQL
9 40 (6.42%) Shell Script
10 32 (5.14%) Go
10 32 (5.14%) Scala
11 19 (3.05%) PHP
12 18 (2.89%) JavaScript
13 12 (1.93%) C
14 10 (1.61%) C++
15 7 (1.12%) C#
16 6 (0.96%) Dart
17 5 (0.80%) R
18 3 (0.48%) Fortran
19 2 (0.32%) Erlang
Qualifications
1 145 (23.27%) Security Cleared
2 94 (15.09%) SC Cleared
3 18 (2.89%) DV Cleared
4 16 (2.57%) Degree
5 9 (1.44%) Cisco Certification
6 8 (1.28%) CISSP
7 5 (0.80%) CCNA
7 5 (0.80%) CCNP
8 4 (0.64%) CCSE
8 4 (0.64%) CESG Certified Professional
8 4 (0.64%) CISA
8 4 (0.64%) CISMP
8 4 (0.64%) CLAS
9 3 (0.48%) Computer Science Degree
9 3 (0.48%) RHCE
10 2 (0.32%) CTC Cleared
10 2 (0.32%) VCP5
10 2 (0.32%) VMware Certified Professional (VCP)
11 1 (0.16%) AWS Certification
11 1 (0.16%) BPSS Clearance
Quality Assurance & Compliance
1 20 (3.21%) QA
2 8 (1.28%) Disclosure Scotland
3 7 (1.12%) SLA
4 4 (0.64%) GDPR
4 4 (0.64%) JSP 440
4 4 (0.64%) PCI DSS
4 4 (0.64%) RMADS
5 3 (0.48%) GCP
6 2 (0.32%) PMO
6 2 (0.32%) Sarbanes-Oxley
System Software
1 216 (34.67%) Docker
2 68 (10.91%) VMware ESXi
3 61 (9.79%) VMware Infrastructure
4 51 (8.19%) Hyper-V
5 49 (7.87%) Active Directory
6 33 (5.30%) HDFS
7 29 (4.65%) Virtual Machines
8 24 (3.85%) Apache Flume
9 19 (3.05%) Samba
9 19 (3.05%) Squid
10 18 (2.89%) KVM
11 17 (2.73%) vCloud
12 12 (1.93%) NFS
12 12 (1.93%) Postfix
13 9 (1.44%) iptables
13 9 (1.44%) Xen
14 8 (1.28%) vSphere
15 6 (0.96%) XenServer
16 4 (0.64%) Ceph
16 4 (0.64%) VirtualBox
Systems Management
1 211 (33.87%) Ansible
2 207 (33.23%) Puppet
3 132 (21.19%) Terraform
4 117 (18.78%) Kubernetes
5 95 (15.25%) Opscode Chef
6 71 (11.40%) Nagios
7 66 (10.59%) logstash
8 45 (7.22%) Grafana
9 41 (6.58%) Prometheus
10 40 (6.42%) ZABBIX
11 36 (5.78%) Packer
12 33 (5.30%) Kibana
13 30 (4.82%) Icinga
14 27 (4.33%) WMI
15 24 (3.85%) Galera Cluster
15 24 (3.85%) Oozie
16 16 (2.57%) HAProxy
16 16 (2.57%) Sysdig
17 15 (2.41%) Docker Swarm
18 14 (2.25%) Rsyslog
Vendors
1 283 (45.43%) Red Hat
2 143 (22.95%) VMware
3 87 (13.96%) Splunk
4 61 (9.79%) Cisco
5 51 (8.19%) Oracle
6 41 (6.58%) Microsoft
7 38 (6.10%) Google
8 35 (5.62%) Cloudera
9 32 (5.14%) SolarWinds
10 27 (4.33%) Atlassian
10 27 (4.33%) Hortonworks
11 25 (4.01%) Juniper
11 25 (4.01%) Salesforce.com
12 24 (3.85%) MapR
13 22 (3.53%) Citrix
14 21 (3.37%) Talend
14 21 (3.37%) Tealium
15 18 (2.89%) Dell
15 18 (2.89%) Extreme Networks
16 17 (2.73%) IBM