The table below looks at the statistics for CentOS skills in IT contracts advertised across the UK. Included is a guide to the contractor rates offered in IT contracts that have cited CentOS over the 3 months to 27 February 2017 with a comparison to the same period over the previous 2 years.

Note that daily contractor rates and hourly contractor rates are treated separately. When calculating average contractor rates, daily rates are not derived from quoted hourly rates or vice versa.

3 months to
27 Feb 2017
Same period 2016 Same period 2015
CentOS Linux
UK
Rank 345 382 387
Rank change year-on-year
+37 +5
Contract jobs citing CentOS 267 267 242
As % of all contract IT jobs located in the UK 0.59% 0.52% 0.46%
As % of the Operating Systems category 2.84% 2.44% 2.08%
Number of daily rates quoted 195 184 162
Median daily rate £453 £450 £425
Median daily rate % change year-on-year
+0.55% +5.88%
90% offered a daily rate of more than £350 £338 £240
10% offered a daily rate of more than £575 £525 £500
UK excluding London median daily rate £450 £430 £375
% change year-on-year
+4.65% +14.66%
Number of hourly rates quoted 5 4 1
Median hourly rate £17.50 £50.00 £47.50
Median hourly rate % change year-on-year
-65.00% +5.26%
UK excluding London median hourly rate £17.50 £8.50 £47.50
% change year-on-year
+105.88% -82.10%

The following table is for comparison with the above and provides statistics for the entire Operating Systems category in contract jobs advertised across the UK.

Operating Systems Category
UK
Contract IT job ads with a match in the
Operating Systems category
9401 10939 11618
As % of all contract IT jobs located in the UK 20.66% 21.37% 22.18%
Number of daily rates quoted 6035 6675 6715
Median daily rate £400 £375 £375
Median daily rate % change year-on-year
+6.66% -
90% offered a daily rate of more than £175 £190 £168
10% offered a daily rate of more than £550 £535 £525
UK excluding London median daily rate £366 £355 £338
% change year-on-year
+3.09% +5.18%
Number of hourly rates quoted 601 724 875
Median hourly rate £16.00 £17.00 £16.16
Median hourly rate % change year-on-year
-5.88% +5.19%
90% offered a hourly rate of more than £11.00 £11.50 £11.00
10% offered a hourly rate of more than £43.50 £45.00 £39.00
UK excluding London median hourly rate £15.25 £17.00 £15.73
% change year-on-year
-10.29% +8.10%

CentOS
Jobs Demand Trend

The demand trend of contract jobs citing CentOS as a proportion of all IT contracts with a match in the Operating Systems category.

CentOS Jobs Demand Trend in the UK

CentOS
Daily Rate Trend

This chart provides the 3-month moving average for daily rates quoted in IT contract jobs citing CentOS within the UK.

CentOS Daily Rate Trend in the UK

CentOS
Daily Rate Histogram

This chart provides a histogram of daily rates quoted in contract IT jobs citing CentOS within the UK over the 3 months to 27 February 2017.

CentOS Daily Rate Histogram in the UK

CentOS
Hourly Rate Trend

This chart provides the 3-month moving average for hourly rates quoted in IT contractor jobs citing CentOS within the UK.

CentOS Hourly Rate Trend in the UK

CentOS
Top 30 Contract Locations

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the UK over the 3 months to 27 February 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Last 3 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
England +31 264 £458 +1.66% 97
London +25 156 £468 +1.08% 36
South East +18 50 £475 +10.46% 22
Berkshire +8 25 £525 +16.99% 5
City of London +10 21 £416 -8.71% 7
North West +28 20 £400 - 6
Reading +9 18 £513 +14.52% 5
West Midlands +21 14 £460 +24.32% 4
Manchester +14 12 £400 -3.03% 5
Surrey +12 10 £400 +18.51% 3
Croydon +8 9 £468 +10.00%
Shropshire - 8 £463 - 3
Hampshire +8 7 £438 +21.52% 7
Yorkshire -1 7 £438 -2.77% 7
Telford - 7 £463 - 3
Bristol +6 6 £400 +25.00% 4
East of England -2 6 £525 +90.90% 7
South West -7 6 £400 +14.28% 7
Windsor +5 5 £550 +10.00%
South Yorkshire +2 5 £450 -5.26% 2
Hammersmith -1 4 £525 -4.54%
Essex -2 4 £525 +90.90% 3
Sheffield 0 3 £425 -10.52% 2
Merseyside 0 3 £463 +8.82%
Woking -7 3 £400 +18.51% 1
Scotland +20 2 £394 - 2
East Sussex +7 2 £438 - 1
East Midlands +1 2 £268 -28.66% 7
Milton Keynes -2 2 £425 -
Farnborough -5 2 £400 -

CentOS
Top 30 Related IT Skills

For the 6 months to 27 February 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 with a requirement for CentOS.

1 637 (100.00%) Linux
2 342 (53.69%) DevOps
3 317 (49.76%) Puppet
4 315 (49.45%) Red Hat Enterprise Linux
5 280 (43.96%) Jenkins
6 278 (43.64%) Red Hat
7 271 (42.54%) Python
8 262 (41.13%) Ansible
9 239 (37.52%) Bash Shell
10 225 (35.32%) Docker
11 222 (34.85%) Ubuntu
12 221 (34.69%) Amazon AWS
13 208 (32.65%) VMware
14 207 (32.50%) Agile Software Development
14 207 (32.50%) Security Cleared
15 204 (32.03%) Git (software)
16 196 (30.77%) Ruby
17 180 (28.26%) Continuous Integration
18 179 (28.10%) Configuration Management
19 177 (27.79%) Java
20 176 (27.63%) SC Cleared
21 147 (23.08%) Apache
22 137 (21.51%) VMware Infrastructure
23 126 (19.78%) PostgreSQL
24 120 (18.84%) Perl
25 119 (18.68%) Windows
26 116 (18.21%) Opscode Chef
27 109 (17.11%) Terraform
28 107 (16.80%) Scrum
29 103 (16.17%) JIRA

CentOS
Top Related IT Skills 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
1 147 (23.08%) Apache
2 97 (15.23%) Confluence
3 71 (11.15%) Tomcat
4 67 (10.52%) Elasticsearch
4 67 (10.52%) nginx
5 51 (8.01%) OpenStack
6 27 (4.24%) IIS
6 27 (4.24%) Jetty
7 20 (3.14%) WildFly
8 18 (2.83%) Mule ESB
9 13 (2.04%) WebSphere
10 11 (1.73%) JBoss
11 7 (1.10%) Apache Qpid
11 7 (1.10%) Apache Spark
11 7 (1.10%) SAS
12 5 (0.78%) Apache Pig
12 5 (0.78%) Apache Solr
12 5 (0.78%) MS Exchange
13 4 (0.63%) CMS
14 3 (0.47%) Apache ServiceMix
Applications
1 32 (5.02%) HipChat
2 8 (1.26%) MS Office
3 6 (0.94%) MS Excel
4 2 (0.31%) Adobe Creative Suite
5 1 (0.16%) Adobe Illustrator
5 1 (0.16%) Photoshop
Business Applications
1 6 (0.94%) SAP Oil and Gas
2 4 (0.63%) Infor M3
3 1 (0.16%) IBM Operational Decision Manager
3 1 (0.16%) Magento
Cloud Services
1 221 (34.69%) Amazon AWS
2 47 (7.38%) Microsoft Azure
3 45 (7.06%) Amazon EC2
4 42 (6.59%) GitHub
5 37 (5.81%) Amazon S3
6 34 (5.34%) AWS CloudFormation
7 24 (3.77%) Route 53
8 22 (3.45%) AWS Lambda
9 19 (2.98%) Amazon CloudWatch
9 19 (2.98%) Virtual Private Cloud
10 13 (2.04%) Amazon ELB
10 13 (2.04%) IaaS
11 9 (1.41%) Amazon ElastiCache
11 9 (1.41%) Cloud Computing
11 9 (1.41%) Google Cloud Platform
12 8 (1.26%) Amazon SQS
12 8 (1.26%) AWS CloudTrail
13 7 (1.10%) AWS Elastic Beanstalk
13 7 (1.10%) CloudFront
14 6 (0.94%) Azure Active Directory
Communications & Networking
1 102 (16.01%) DNS
2 94 (14.76%) TCP/IP
3 92 (14.44%) VPN
4 74 (11.62%) Firewall
5 59 (9.26%) SSH
6 56 (8.79%) LDAP
7 47 (7.38%) HTTP
8 41 (6.44%) SSL
9 37 (5.81%) Reverse Proxy
10 35 (5.49%) OpenVPN
11 34 (5.34%) OpenLDAP
12 33 (5.18%) SAN
13 25 (3.92%) IPsec
14 23 (3.61%) Cisco Nexus
15 22 (3.45%) SMTP
16 17 (2.67%) DHCP
17 15 (2.35%) ICMP
18 12 (1.88%) Internet
18 12 (1.88%) Kerberos
19 10 (1.57%) DMZ
Database & Business Intelligence
1 126 (19.78%) PostgreSQL
2 89 (13.97%) MySQL
3 78 (12.24%) Hadoop
4 58 (9.11%) NoSQL
5 32 (5.02%) SQL Server
6 31 (4.87%) Big Data
7 28 (4.40%) Amazon RDS
8 22 (3.45%) MongoDB
8 22 (3.45%) Oracle Database
9 20 (3.14%) Apache Cassandra
10 18 (2.83%) Amazon DynamoDB
10 18 (2.83%) MariaDB
11 17 (2.67%) Relational Database
12 14 (2.20%) Apache Hive
12 14 (2.20%) Oracle Database 11g
13 12 (1.88%) Redis
14 8 (1.26%) SQL Server 2012
15 6 (0.94%) Impala
16 5 (0.78%) Data Warehouse
17 3 (0.47%) Ingres
Development Applications
1 280 (43.96%) Jenkins
2 204 (32.03%) Git (software)
3 103 (16.17%) JIRA
4 72 (11.30%) Maven
5 46 (7.22%) Sonatype Nexus
6 42 (6.59%) Bitbucket
7 41 (6.44%) SonarQube
8 40 (6.28%) JIRA Agile
9 39 (6.12%) JUnit
10 35 (5.49%) Ant
11 33 (5.18%) Atlassian Bamboo
12 32 (5.02%) Liquibase
13 31 (4.87%) Vagrant
14 29 (4.55%) GitLab
14 29 (4.55%) Subversion
15 25 (3.92%) Gerrit
16 24 (3.77%) Hudson
17 21 (3.30%) TeamCity
18 19 (2.98%) Mercurial
19 10 (1.57%) Octopus Deploy
General
1 39 (6.12%) Finance
2 24 (3.77%) Telecoms
3 17 (2.67%) Law
4 10 (1.57%) Retail
5 8 (1.26%) Marketing
6 7 (1.10%) Manufacturing
7 6 (0.94%) Electronics
8 5 (0.78%) Banking
9 4 (0.63%) Back Office
9 4 (0.63%) Legal
10 2 (0.31%) Games
11 1 (0.16%) Front Office
11 1 (0.16%) Investment Banking
11 1 (0.16%) Pharmaceutical
11 1 (0.16%) Publishing
Job Titles
1 225 (35.32%) DevOps Engineer
2 101 (15.86%) Administrator
3 94 (14.76%) AWS DevOps
4 79 (12.40%) Linux Engineer
5 78 (12.24%) Linux Administrator
6 77 (12.09%) Systems Administrator
7 70 (10.99%) Linux Systems Administrator
8 69 (10.83%) AWS Engineer
9 67 (10.52%) Consultant
9 67 (10.52%) Linux/Unix DevOps
10 65 (10.20%) Developer
11 51 (8.01%) DevOps Consultant
12 45 (7.06%) Senior DevOps
13 38 (5.97%) Linux DevOps Engineer
14 31 (4.87%) AWS Consultant
15 28 (4.40%) DBA
16 23 (3.61%) Infrastructure Engineer
17 21 (3.30%) Senior DevOps Engineer
18 20 (3.14%) Java Engineer
19 19 (2.98%) Senior DevOps Consultant
Libraries, Frameworks & Software Standards
1 75 (11.77%) Elastic Stack
2 46 (7.22%) LAMP
2 46 (7.22%) MCollective
3 40 (6.28%) Web Services
4 35 (5.49%) Software Packaging
5 32 (5.02%) HTML
6 30 (4.71%) LAPP Stack
7 28 (4.40%) CSS
8 26 (4.08%) RabbitMQ
8 26 (4.08%) REST
9 25 (3.92%) XML
10 24 (3.77%) LEMP Stack
11 22 (3.45%) JSON
12 21 (3.30%) Node.js
13 17 (2.67%) XSLT
14 16 (2.51%) Kafka
14 16 (2.51%) RSS
15 14 (2.20%) .NET
15 14 (2.20%) PostGIS
16 11 (1.73%) ActiveMQ
Miscellaneous
1 51 (8.01%) Data Centre
2 42 (6.59%) Linux Command Line
3 39 (6.12%) Public Cloud
4 19 (2.98%) Clustering
5 16 (2.51%) Analytical Skills
5 16 (2.51%) PKI
5 16 (2.51%) Web 2.0
6 13 (2.04%) Computer Science
7 12 (1.88%) Management Information System
8 11 (1.73%) Algorithms
8 11 (1.73%) Private Cloud
8 11 (1.73%) Replication
9 7 (1.10%) Embedded Systems
9 7 (1.10%) Mobile App
10 4 (0.63%) CMDB
10 4 (0.63%) NHS
10 4 (0.63%) Spread Betting
11 3 (0.47%) MPEG
11 3 (0.47%) STB
11 3 (0.47%) User Experience
Operating Systems
1 637 (100.00%) Linux
2 315 (49.45%) Red Hat Enterprise Linux
3 222 (34.85%) Ubuntu
4 119 (18.68%) Windows
5 78 (12.24%) Unix
6 59 (9.26%) Debian
7 42 (6.59%) Windows Server
8 23 (3.61%) Fedora
9 18 (2.83%) SUSE
9 18 (2.83%) Windows Server 2012
10 16 (2.51%) Windows Server 2008
11 13 (2.04%) RancherOS
11 13 (2.04%) VyOS
12 10 (1.57%) Windows Server 2003
13 7 (1.10%) Solaris
14 6 (0.94%) CoreOS
14 6 (0.94%) Windows 2000
15 5 (0.78%) AIX
15 5 (0.78%) Apple iOS
16 4 (0.63%) Android
Processes & Methodologies
1 342 (53.69%) DevOps
2 207 (32.50%) Agile Software Development
3 180 (28.26%) Continuous Integration
4 179 (28.10%) Configuration Management
5 107 (16.80%) Scrum
6 77 (12.09%) Continuous Delivery
7 71 (11.15%) Load Balancing
8 61 (9.58%) Service Management
9 58 (9.11%) Open Source
10 44 (6.91%) ITIL
11 38 (5.97%) Performance Tuning
12 37 (5.81%) Migration
12 37 (5.81%) Workflow
13 33 (5.18%) Mentoring
14 32 (5.02%) Identity Management
15 29 (4.55%) Stakeholder Management
16 28 (4.40%) Coaching
17 24 (3.77%) Business Intelligence
17 24 (3.77%) OOP
17 24 (3.77%) Performance Monitoring
Programming Languages
1 271 (42.54%) Python
2 239 (37.52%) Bash Shell
3 196 (30.77%) Ruby
4 177 (27.79%) Java
5 120 (18.84%) Perl
6 69 (10.83%) JavaScript
7 58 (9.11%) PHP
8 56 (8.79%) Shell Script
9 54 (8.48%) SQL
10 38 (5.97%) PowerShell
11 35 (5.49%) C
12 21 (3.30%) C#
13 20 (3.14%) C++
14 13 (2.04%) Groovy
15 8 (1.26%) Go
16 7 (1.10%) Korn
17 6 (0.94%) PL/SQL
17 6 (0.94%) R
17 6 (0.94%) Scala
18 3 (0.47%) sed
Qualifications
1 207 (32.50%) Security Cleared
2 176 (27.63%) SC Cleared
3 35 (5.49%) Degree
4 24 (3.77%) DV Cleared
5 19 (2.98%) VMware Certified Professional (VCP)
6 17 (2.67%) Cisco Certification
7 14 (2.20%) AWS Certification
7 14 (2.20%) CTC Cleared
8 13 (2.04%) BPSS Clearance
9 11 (1.73%) CCNP
10 10 (1.57%) CCNA
11 9 (1.41%) Microsoft Certification
12 6 (0.94%) CEH
12 6 (0.94%) MCP
12 6 (0.94%) RHCT
13 4 (0.63%) BC Cleared
14 3 (0.47%) CESG Certified Professional
14 3 (0.47%) MCSE
14 3 (0.47%) RHCE
15 2 (0.31%) CISA
Quality Assurance & Compliance
1 29 (4.55%) QA
2 9 (1.41%) PCI DSS
3 7 (1.10%) Disclosure Scotland
4 1 (0.16%) ISO/IEC 27001
4 1 (0.16%) PMO
System Software
1 225 (35.32%) Docker
2 137 (21.51%) VMware Infrastructure
3 60 (9.42%) vCloud
3 60 (9.42%) Virtual Machines
4 49 (7.69%) Active Directory
5 39 (6.12%) Squid
6 38 (5.97%) Postfix
7 23 (3.61%) vSphere
8 19 (2.98%) Xen
9 15 (2.35%) KVM
9 15 (2.35%) VMware ESXi
10 12 (1.88%) VMware ESX
11 10 (1.57%) Hyper-V
12 8 (1.26%) VirtualBox
13 6 (0.94%) Apache ZooKeeper
14 5 (0.78%) GlusterFS
14 5 (0.78%) Sendmail
14 5 (0.78%) VMware Server
15 4 (0.63%) HDFS
15 4 (0.63%) iptables
Systems Management
1 317 (49.76%) Puppet
2 262 (41.13%) Ansible
3 116 (18.21%) Opscode Chef
4 109 (17.11%) Terraform
5 96 (15.07%) Kubernetes
6 78 (12.24%) ZABBIX
7 73 (11.46%) Kibana
8 64 (10.05%) logstash
9 62 (9.73%) Nagios
10 46 (7.22%) HAProxy
11 39 (6.12%) Rancher
12 33 (5.18%) Docker Swarm
13 27 (4.24%) SELinux
14 26 (4.08%) Packer
15 24 (3.77%) Consul
16 14 (2.20%) Graphite
17 13 (2.04%) Salt
17 13 (2.04%) SCCM
18 12 (1.88%) Pingdom
19 11 (1.73%) yum
Vendors
1 278 (43.64%) Red Hat
2 208 (32.65%) VMware
3 59 (9.26%) Oracle
4 58 (9.11%) Atlassian
5 43 (6.75%) Cisco
6 40 (6.28%) Microsoft
7 36 (5.65%) Sonatype
8 33 (5.18%) AppDynamics
9 29 (4.55%) Splunk
10 19 (2.98%) SaltStack
11 18 (2.83%) New Relic
12 17 (2.67%) Google
13 16 (2.51%) HP
14 14 (2.20%) EMC
15 13 (2.04%) PagerDuty
15 13 (2.04%) Vyatta
16 9 (1.41%) Symantec
17 8 (1.26%) IBM
18 6 (0.94%) SAP
18 6 (0.94%) Sybase
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