Period
to 23 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 23 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
23 Nov 2017
Same period 2016 Same period 2015
Rank 391 305 425
Rank change year-on-year -86 +120 -27
Contract jobs citing CentOS 576 803 537
As % of all contract IT jobs advertised in England 0.61% 0.82% 0.52%
As % of the Operating Systems category 2.90% 3.82% 2.39%
Number of daily rates quoted 420 565 347
England median daily rate £455 £463 £425
Median daily rate % change year-on-year -1.62% +8.82% +6.25%
10th Percentile £313 £313 £300
90th Percentile £588 £588 £550
UK median daily rate £450 £463 £425
% change year-on-year -2.70% +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 19845 21014 22456
As % of all contract IT jobs advertised in England 20.92% 21.49% 21.62%
Number of daily rates quoted 12771 13399 13356
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 £569
UK median daily rate £425 £400 £393
% change year-on-year +6.25% +1.91% +4.67%
Number of hourly rates quoted 1202 1188 1828
England median hourly rate £17.50 £16.50 £16.50
Median hourly rate % change year-on-year +6.06% - +4.93%
10th Percentile £11.00 £10.75 £10.50
90th Percentile £47.83 £43.75 £42.31
UK median hourly rate £17.50 £16.29 £16.50
% change year-on-year +7.43% -1.27% +4.76%

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 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 23 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 23 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 -90 341 £500 - 61
South East -26 80 £440 - 25
North of England +4 64 £425 - 20
South West +12 45 £400 -11.11% 10
North West +20 40 £425 - 12
Midlands +20 28 £350 -15.66% 7
Yorkshire -14 23 £463 +8.82% 8
West Midlands +37 18 £425 -2.86% 4
East of England -18 16 £415 +10.67% 1
East Midlands -16 10 £290 -25.16% 3
North East +41 1 - -
CentOS
UK

For the 6 months to 23 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.

1 576 (100.00%) Linux
2 320 (55.56%) DevOps
3 289 (50.17%) Red Hat Enterprise Linux
4 277 (48.09%) Red Hat
5 245 (42.53%) Amazon AWS
6 234 (40.63%) Bash Shell
7 229 (39.76%) Puppet
8 226 (39.24%) Python
9 207 (35.94%) Jenkins
10 183 (31.77%) Docker
11 179 (31.08%) VMware
12 172 (29.86%) Ubuntu
13 167 (28.99%) Git (software)
14 163 (28.30%) Agile Software Development
15 154 (26.74%) Ansible
16 153 (26.56%) Java
17 144 (25.00%) Configuration Management
18 121 (21.01%) Continuous Integration
19 119 (20.66%) Security Cleared
20 113 (19.62%) Terraform
21 112 (19.44%) Windows
22 111 (19.27%) DNS
23 100 (17.36%) Opscode Chef
23 100 (17.36%) Kubernetes
24 97 (16.84%) Tomcat
24 97 (16.84%) Unix
25 91 (15.80%) Perl
26 89 (15.45%) MySQL
26 89 (15.45%) SC Cleared
27 84 (14.58%) 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 97 (16.84%) Tomcat
2 71 (12.33%) Apache
3 59 (10.24%) Elasticsearch
4 47 (8.16%) Confluence
5 38 (6.60%) nginx
6 30 (5.21%) OpenStack
7 24 (4.17%) Apache Spark
7 24 (4.17%) JBoss
8 22 (3.82%) WebSphere
9 13 (2.26%) Apache Solr
9 13 (2.26%) MS Exchange
10 11 (1.91%) Jetty
11 9 (1.56%) Apache Pig
12 8 (1.39%) IIS
12 8 (1.39%) SAS
13 7 (1.22%) Cloud Foundry
14 4 (0.69%) Adobe Experience Manager
14 4 (0.69%) Drupal
14 4 (0.69%) WordPress
15 3 (0.52%) SharePoint 2010
Applications
1 9 (1.56%) Houdini
1 9 (1.56%) Maya
1 9 (1.56%) NUKE
1 9 (1.56%) Photoshop
2 1 (0.17%) HipChat
2 1 (0.17%) Microsoft Excel
2 1 (0.17%) MS Visio
2 1 (0.17%) Stata
Cloud Services
1 245 (42.53%) Amazon AWS
2 64 (11.11%) Amazon EC2
3 46 (7.99%) Amazon S3
3 46 (7.99%) Microsoft Azure
4 43 (7.47%) Virtual Private Cloud
5 39 (6.77%) AWS CloudFormation
6 26 (4.51%) AWS Lambda
6 26 (4.51%) Serverless
7 25 (4.34%) Amazon CloudWatch
8 23 (3.99%) Amazon ELB
9 20 (3.47%) Route 53
10 19 (3.30%) GitHub
11 17 (2.95%) Cloud Computing
12 16 (2.78%) Google Cloud Platform
13 15 (2.60%) Office 365
14 11 (1.91%) IaaS
15 7 (1.22%) Amazon SQS
16 6 (1.04%) Amazon EMR
16 6 (1.04%) SaaS
17 5 (0.87%) Amazon ElastiCache
Communications & Networking
1 111 (19.27%) DNS
2 79 (13.72%) Firewall
3 49 (8.51%) VPN
4 47 (8.16%) DHCP
5 44 (7.64%) HTTP
6 36 (6.25%) LAN
6 36 (6.25%) SAN
6 36 (6.25%) WAN
7 35 (6.08%) LDAP
8 33 (5.73%) TCP/IP
9 29 (5.03%) SSL
10 24 (4.17%) OpenLDAP
11 22 (3.82%) SMTP
12 20 (3.47%) Network Security
12 20 (3.47%) SSH
13 17 (2.95%) Internet
13 17 (2.95%) OpenVPN
14 14 (2.43%) NetScaler
14 14 (2.43%) Wireless
15 11 (1.91%) Kerberos
Database & Business Intelligence
1 89 (15.45%) MySQL
2 71 (12.33%) MongoDB
3 60 (10.42%) PostgreSQL
4 35 (6.08%) Hadoop
5 34 (5.90%) NoSQL
6 32 (5.56%) Big Data
7 31 (5.38%) Apache Cassandra
8 30 (5.21%) Amazon RDS
9 26 (4.51%) DB2
10 25 (4.34%) Relational Database
11 20 (3.47%) Redis
12 14 (2.43%) SQL Server
13 13 (2.26%) Apache Hive
13 13 (2.26%) RDBMS
14 12 (2.08%) Amazon DynamoDB
15 11 (1.91%) Impala
16 10 (1.74%) Riak
17 9 (1.56%) Data Mining
17 9 (1.56%) Data Warehouse
17 9 (1.56%) MarkLogic
Development Applications
1 207 (35.94%) Jenkins
2 167 (28.99%) Git (software)
3 73 (12.67%) Maven
4 57 (9.90%) JIRA
5 41 (7.12%) Sonatype Nexus
6 28 (4.86%) Bitbucket
6 28 (4.86%) GitLab
7 27 (4.69%) Vagrant
8 24 (4.17%) Subversion
9 23 (3.99%) SonarQube
10 22 (3.82%) Atlassian Bamboo
11 19 (3.30%) JUnit
12 18 (3.13%) Ant
13 17 (2.95%) Liquibase
14 12 (2.08%) TeamCity
15 8 (1.39%) JMeter
15 8 (1.39%) Selenium
16 6 (1.04%) Gradle
16 6 (1.04%) Mercurial
17 5 (0.87%) git-flow
General
1 40 (6.94%) Finance
2 18 (3.13%) Retail
3 13 (2.26%) Games
4 12 (2.08%) Telecoms
5 6 (1.04%) Banking
6 3 (0.52%) Advertising
6 3 (0.52%) Manufacturing
7 2 (0.35%) Publishing
8 1 (0.17%) Aerospace
8 1 (0.17%) Billing
8 1 (0.17%) Financial Institution
8 1 (0.17%) Front Office
8 1 (0.17%) International Banking
8 1 (0.17%) Marketing
8 1 (0.17%) Pharmaceutical
Job Titles
1 233 (40.45%) DevOps Engineer
2 113 (19.62%) Linux Engineer
3 107 (18.58%) Administrator
4 86 (14.93%) AWS DevOps
5 84 (14.58%) Systems Administrator
6 83 (14.41%) Linux/Unix DevOps
7 82 (14.24%) Linux Administrator
8 71 (12.33%) Linux DevOps Engineer
9 70 (12.15%) AWS Engineer
10 68 (11.81%) Linux Systems Administrator
11 56 (9.72%) AWS DevOps Engineer
12 51 (8.85%) Developer
13 38 (6.60%) Systems Engineer
14 34 (5.90%) Consultant
15 29 (5.03%) Senior DevOps
16 27 (4.69%) Linux Systems Engineer
17 26 (4.51%) DevOps Consultant
18 23 (3.99%) Senior DevOps Engineer
18 23 (3.99%) Windows Engineer
19 22 (3.82%) Operations Engineer
Libraries, Frameworks & Software Standards
1 66 (11.46%) Elastic Stack
2 64 (11.11%) Web Services
3 34 (5.90%) LAMP
3 34 (5.90%) MCollective
4 33 (5.73%) REST
5 32 (5.56%) ActiveMQ
6 19 (3.30%) RabbitMQ
6 19 (3.30%) RESTful
6 19 (3.30%) XML
7 18 (3.13%) Sensu
8 17 (2.95%) Hibernate
8 17 (2.95%) Kafka
9 16 (2.78%) Spring
10 14 (2.43%) Java EE
10 14 (2.43%) Node.js
10 14 (2.43%) SOAP
11 13 (2.26%) EJB
11 13 (2.26%) Regular Expression
11 13 (2.26%) Struts
12 12 (2.08%) Natural Language Processing
Miscellaneous
1 46 (7.99%) Linux Command Line
2 35 (6.08%) Replication
3 30 (5.21%) Analytical Skills
4 29 (5.03%) Clustering
4 29 (5.03%) Data Centre
4 29 (5.03%) Greenfield Project
4 29 (5.03%) Public Cloud
5 25 (4.34%) Computer Science
6 21 (3.65%) Device Driver
7 15 (2.60%) PKI
8 12 (2.08%) Algorithms
9 11 (1.91%) Derivative
10 10 (1.74%) Private Cloud
11 9 (1.56%) Fintech
12 8 (1.39%) Animation
12 8 (1.39%) Video on Demand
13 7 (1.22%) Spread Betting
14 5 (0.87%) Mobile App
15 3 (0.52%) Hybrid Cloud
15 3 (0.52%) RIA
Operating Systems
1 576 (100.00%) Linux
2 289 (50.17%) Red Hat Enterprise Linux
3 172 (29.86%) Ubuntu
4 112 (19.44%) Windows
5 97 (16.84%) Unix
6 73 (12.67%) Windows Server
7 37 (6.42%) Windows Server 2012
8 35 (6.08%) Debian
9 30 (5.21%) Windows Server 2003
10 15 (2.60%) Solaris
11 14 (2.43%) Windows 7
12 11 (1.91%) Fedora
13 10 (1.74%) SUSE
13 10 (1.74%) Windows Server 2008
14 6 (1.04%) CoreOS
14 6 (1.04%) Mac OS X
15 4 (0.69%) Scientific Linux
15 4 (0.69%) VMS
16 3 (0.52%) Data ONTAP
17 2 (0.35%) Windows 10
Processes & Methodologies
1 320 (55.56%) DevOps
2 163 (28.30%) Agile Software Development
3 144 (25.00%) Configuration Management
4 121 (21.01%) Continuous Integration
5 73 (12.67%) Open Source
5 73 (12.67%) Scrum
6 63 (10.94%) Load Balancing
7 42 (7.29%) Mentoring
8 41 (7.12%) Continuous Delivery
9 36 (6.25%) Test Automation
10 35 (6.08%) Migration
11 33 (5.73%) Software Engineering
12 31 (5.38%) Continuous Deployment
13 29 (5.03%) Service Management
14 25 (4.34%) ITIL
15 24 (4.17%) Immutable Infrastructure
16 21 (3.65%) Coaching
16 21 (3.65%) Patch Management
17 20 (3.47%) SDLC
17 20 (3.47%) Vulnerability Scanning
Programming Languages
1 234 (40.63%) Bash Shell
2 226 (39.24%) Python
3 153 (26.56%) Java
4 91 (15.80%) Perl
5 84 (14.58%) Ruby
6 53 (9.20%) PowerShell
7 52 (9.03%) SQL
8 49 (8.51%) Shell Script
9 37 (6.42%) JavaScript
10 34 (5.90%) Groovy
11 23 (3.99%) PHP
12 22 (3.82%) C
12 22 (3.82%) C++
12 22 (3.82%) Go
13 16 (2.78%) Scala
14 13 (2.26%) C#
15 11 (1.91%) Korn
16 10 (1.74%) R
17 7 (1.22%) AWK
18 6 (1.04%) Bourne shell
Qualifications
1 119 (20.66%) Security Cleared
2 89 (15.45%) SC Cleared
3 33 (5.73%) Degree
4 11 (1.91%) Computer Science Degree
4 11 (1.91%) RHCE
5 10 (1.74%) Cisco Certification
6 8 (1.39%) RHCSA
7 6 (1.04%) CCNA
7 6 (1.04%) Microsoft Certification
8 5 (0.87%) BPSS Clearance
8 5 (0.87%) CCNP
8 5 (0.87%) CISSP
8 5 (0.87%) OCA
8 5 (0.87%) OCP
8 5 (0.87%) Oracle Certification
9 4 (0.69%) CCSE
9 4 (0.69%) CISA
9 4 (0.69%) CISMP
10 3 (0.52%) JNCIS
11 2 (0.35%) VMware Certified Professional (VCP)
Quality Assurance & Compliance
1 21 (3.65%) QA
2 18 (3.13%) Disclosure Scotland
3 6 (1.04%) SLA
4 5 (0.87%) ISO/IEC 27001
4 5 (0.87%) PCI DSS
5 4 (0.69%) GDPR
6 2 (0.35%) GCP
6 2 (0.35%) PMO
7 1 (0.17%) JSP 440
System Software
1 183 (31.77%) Docker
2 83 (14.41%) VMware Infrastructure
3 56 (9.72%) Active Directory
3 56 (9.72%) VMware ESXi
4 50 (8.68%) Hyper-V
5 39 (6.77%) KVM
5 39 (6.77%) Virtual Machines
6 25 (4.34%) Samba
7 21 (3.65%) Squid
7 21 (3.65%) vCloud
8 19 (3.30%) NFS
9 17 (2.95%) Postfix
10 16 (2.78%) LXC
11 12 (2.08%) Xen
12 11 (1.91%) iptables
13 7 (1.22%) GlusterFS
14 6 (1.04%) HDFS
15 5 (0.87%) Veritas Cluster Server
15 5 (0.87%) vSphere
16 3 (0.52%) VirtualBox
Systems Management
1 229 (39.76%) Puppet
2 154 (26.74%) Ansible
3 113 (19.62%) Terraform
4 100 (17.36%) Kubernetes
4 100 (17.36%) Opscode Chef
5 78 (13.54%) Nagios
6 52 (9.03%) logstash
7 44 (7.64%) ZABBIX
8 37 (6.42%) Packer
9 36 (6.25%) Grafana
10 32 (5.56%) Prometheus
11 30 (5.21%) Icinga
12 25 (4.34%) Kibana
13 23 (3.99%) WMI
14 22 (3.82%) Rsyslog
15 20 (3.47%) Galera Cluster
15 20 (3.47%) Rancher
16 19 (3.30%) Docker Swarm
17 17 (2.95%) yum
18 16 (2.78%) Sysdig
Vendors
1 277 (48.09%) Red Hat
2 179 (31.08%) VMware
3 71 (12.33%) Cisco
4 55 (9.55%) Splunk
5 32 (5.56%) Oracle
6 28 (4.86%) Microsoft
7 27 (4.69%) Juniper
8 25 (4.34%) Atlassian
9 24 (4.17%) IBM
9 24 (4.17%) SolarWinds
10 21 (3.65%) Citrix
10 21 (3.65%) HP
11 20 (3.47%) EMC
12 19 (3.30%) Google
13 18 (3.13%) NetApp
14 17 (2.95%) Sonatype
15 15 (2.60%) Dell
15 15 (2.60%) Extreme Networks
16 14 (2.43%) CheckPoint
17 13 (2.26%) New Relic