Period
to 21 September 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 21 September 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
21 Sep 2018
Same period 2017 Same period 2016
Rank 361 351 344
Rank change year-on-year -10 -7 +111
Contract jobs citing CentOS 656 628 722
As % of all contract IT jobs advertised in England 0.70% 0.69% 0.72%
As % of the Operating Systems category 3.36% 3.35% 3.30%
Number of daily rates quoted 418 450 505
England median daily rate £500 £490 £450
Median daily rate % change year-on-year +2.04% +8.89% +9.76%
10th Percentile £375 £332 £305
90th Percentile £600 £600 £588
UK median daily rate £500 £488 £450
% change year-on-year +2.56% +8.33% +9.09%
Number of hourly rates quoted 6 15 5
England median hourly rate £48.42 £35.00 £13.50
Median hourly rate % change year-on-year +38.33% +159.26% -62.50%
10th Percentile £28.36 £17.00 £11.48
90th Percentile £55.13 £48.75 £57.50
UK median hourly rate £48.42 £35.00 £13.50
% change year-on-year +38.33% +159.26% -62.50%

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 19,530 18,748 21,858
As % of all contract IT jobs advertised in England 20.80% 20.64% 21.94%
Number of daily rates quoted 12,164 11,884 14,033
England median daily rate £438 £425 £410
Median daily rate % change year-on-year +2.94% +3.66% +5.81%
10th Percentile £175 £188 £213
90th Percentile £613 £594 £575
UK median daily rate £425 £425 £400
% change year-on-year - +6.25% +6.67%
Number of hourly rates quoted 1,413 1,120 1,142
England median hourly rate £17.50 £17.50 £16.50
Median hourly rate % change year-on-year - +6.06% +0.46%
10th Percentile £11.17 £10.75 £10.63
90th Percentile £47.50 £48.01 £43.75
UK median hourly rate £17.41 £17.50 £16.50
% change year-on-year -0.51% +6.06% +1.23%

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 21 September 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 21 September 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 21 September 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 -22 339 £550 +7.32% 63
South East -15 105 £429 -9.79% 38
North of England +20 91 £488 +14.71% 27
East of England +31 53 £425 -5.56% 12
South West -12 47 £413 -6.99% 23
North West -5 44 £492 +15.65% 15
North East +15 25 £538 - 4
Yorkshire -5 24 £438 +4.17% 8
Midlands -36 20 £400 -5.88% 12
East Midlands +12 13 £400 +37.93% 5
West Midlands -45 7 £413 -10.33% 7
CentOS
UK

For the 6 months to 21 September 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.

1 656 (100.00%) Linux
2 394 (60.06%) DevOps
3 319 (48.63%) Ansible
4 317 (48.32%) Jenkins
5 308 (46.95%) Red Hat Enterprise Linux
6 306 (46.65%) Puppet
7 305 (46.49%) Red Hat
8 301 (45.88%) Docker
9 278 (42.38%) Amazon AWS
10 270 (41.16%) Python
11 228 (34.76%) Bash Shell
12 224 (34.15%) Git (software)
13 215 (32.77%) Agile Software Development
14 213 (32.47%) Terraform
15 187 (28.51%) Kubernetes
16 170 (25.91%) Security Cleared
17 169 (25.76%) Ubuntu
17 169 (25.76%) Windows
18 163 (24.85%) VMware
19 157 (23.93%) Configuration Management
20 147 (22.41%) Continuous Integration
21 132 (20.12%) Java
22 121 (18.45%) SC Cleared
23 118 (17.99%) MySQL
24 108 (16.46%) Unix
25 104 (15.85%) Nagios
26 103 (15.70%) Opscode Chef
27 101 (15.40%) Apache
28 100 (15.24%) MongoDB
29 95 (14.48%) Elastic Stack

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
1 101 (15.40%) Apache
2 57 (8.69%) OpenStack
3 56 (8.54%) nginx
3 56 (8.54%) Tomcat
4 36 (5.49%) Confluence
5 34 (5.18%) Elasticsearch
6 21 (3.20%) IIS
7 20 (3.05%) Jetty
8 18 (2.74%) Mongrel
8 18 (2.74%) WebSphere
9 17 (2.59%) JBoss
10 5 (0.76%) lighttpd
11 4 (0.61%) Apache Spark
11 4 (0.61%) Oracle SOA Suite
11 4 (0.61%) WebLogic
12 2 (0.30%) Drupal
12 2 (0.30%) GlassFish
12 2 (0.30%) MS Exchange
12 2 (0.30%) Mule ESB
12 2 (0.30%) WildFly
Applications
1 10 (1.52%) Microsoft Office
2 2 (0.30%) HipChat
3 1 (0.15%) Houdini
3 1 (0.15%) Maya
3 1 (0.15%) NUKE
3 1 (0.15%) Photoshop
Business Applications
1 3 (0.46%) Towers Watson Igloo
2 1 (0.15%) BusinessWorks
2 1 (0.15%) Distributed Ledger
2 1 (0.15%) Magento
Cloud Services
1 278 (42.38%) Amazon AWS
2 84 (12.80%) Microsoft Azure
3 81 (12.35%) Amazon EC2
4 74 (11.28%) GitHub
5 65 (9.91%) AWS CloudFormation
6 55 (8.38%) Virtual Private Cloud
7 53 (8.08%) Amazon S3
8 40 (6.10%) Google Cloud Platform
9 35 (5.34%) Amazon CloudWatch
9 35 (5.34%) Amazon ELB
10 29 (4.42%) Cloud Computing
11 28 (4.27%) Route 53
12 19 (2.90%) Datadog
13 16 (2.44%) Sumo Logic
14 10 (1.52%) Amazon SQS
15 9 (1.37%) AWS Lambda
15 9 (1.37%) Serverless
16 7 (1.07%) Google App Engine
16 7 (1.07%) IaaS
16 7 (1.07%) Rackspace Cloud
Communications & Networking
1 87 (13.26%) Firewall
2 68 (10.37%) HTTP
3 60 (9.15%) DNS
4 30 (4.57%) VPN
5 29 (4.42%) TCP/IP
6 27 (4.12%) SSH
7 24 (3.66%) OpenLDAP
8 23 (3.51%) Intrusion Detection
9 18 (2.74%) SAN
10 16 (2.44%) SSL
11 15 (2.29%) DHCP
11 15 (2.29%) Kerberos
12 13 (1.98%) Network Security
13 11 (1.68%) OpenVPN
14 10 (1.52%) Internet
15 9 (1.37%) LAN
15 9 (1.37%) WAN
16 8 (1.22%) Unicast
17 7 (1.07%) Ethernet
17 7 (1.07%) Fibre Channel
Database & Business Intelligence
1 118 (17.99%) MySQL
2 100 (15.24%) MongoDB
3 64 (9.76%) PostgreSQL
4 57 (8.69%) Hadoop
5 40 (6.10%) Apache Cassandra
6 32 (4.88%) Amazon RDS
7 30 (4.57%) SQL Server
8 29 (4.42%) NoSQL
9 24 (3.66%) Big Data
10 21 (3.20%) SQL Server 2016
11 9 (1.37%) Ingres
12 8 (1.22%) MarkLogic
13 7 (1.07%) Redis
13 7 (1.07%) Relational Database
14 6 (0.91%) RDBMS
15 5 (0.76%) Amazon Redshift
15 5 (0.76%) HBase
16 4 (0.61%) Azure SQL Database
16 4 (0.61%) Oracle Database
17 3 (0.46%) SQLite
Development Applications
1 317 (48.32%) Jenkins
2 224 (34.15%) Git (software)
3 72 (10.98%) Maven
4 71 (10.82%) GitLab
4 71 (10.82%) Vagrant
5 62 (9.45%) JIRA
6 55 (8.38%) Sonatype Nexus
7 50 (7.62%) Atlassian Bamboo
8 44 (6.71%) SonarQube
9 31 (4.73%) Artifactory
10 28 (4.27%) Bitbucket
11 27 (4.12%) Ant
11 27 (4.12%) Travis CI
12 24 (3.66%) TeamCity
13 22 (3.35%) JUnit
13 22 (3.35%) MSBuild
14 18 (2.74%) CruiseControl
14 18 (2.74%) Gradle
15 16 (2.44%) Subversion
16 14 (2.13%) Cucumber
General
1 27 (4.12%) Telecoms
2 23 (3.51%) Finance
3 13 (1.98%) Banking
4 8 (1.22%) Manufacturing
4 8 (1.22%) Marketing
5 7 (1.07%) Legal
6 6 (0.91%) Games
7 5 (0.76%) Automotive
7 5 (0.76%) Electronics
7 5 (0.76%) Retail
8 4 (0.61%) Investment Banking
9 3 (0.46%) Publishing
10 2 (0.30%) Advertising
10 2 (0.30%) Pharmaceutical
11 1 (0.15%) Aerospace
11 1 (0.15%) Financial Institution
Job Titles
1 302 (46.04%) DevOps Engineer
2 80 (12.20%) Administrator
3 78 (11.89%) Linux Engineer
4 74 (11.28%) AWS DevOps
5 68 (10.37%) Systems Administrator
6 62 (9.45%) AWS Engineer
7 61 (9.30%) AWS DevOps Engineer
8 49 (7.47%) Developer
9 46 (7.01%) Linux Administrator
10 45 (6.86%) Linux Systems Administrator
11 41 (6.25%) Senior DevOps
12 40 (6.10%) Linux/Unix DevOps
13 35 (5.34%) Senior DevOps Engineer
14 32 (4.88%) Linux DevOps Engineer
15 30 (4.57%) Consultant
15 30 (4.57%) Unix Administrator
16 25 (3.81%) Unix Systems Administrator
17 23 (3.51%) Infrastructure Engineer
18 21 (3.20%) Architect
19 18 (2.74%) Systems Engineer
Libraries, Frameworks & Software Standards
1 95 (14.48%) Elastic Stack
2 69 (10.52%) Kafka
3 38 (5.79%) LDAP
4 36 (5.49%) Web Services
5 32 (4.88%) LAMP
6 25 (3.81%) LAPP Stack
7 23 (3.51%) RabbitMQ
7 23 (3.51%) Spring Boot
8 22 (3.35%) REST
9 21 (3.20%) LEMP Stack
10 19 (2.90%) Spring
10 19 (2.90%) XML
11 18 (2.74%) HTML
11 18 (2.74%) JRuby
11 18 (2.74%) Servlets
12 15 (2.29%) ActiveMQ
12 15 (2.29%) JSON
13 14 (2.13%) Zuul
14 13 (1.98%) CSS
15 12 (1.83%) Node.js
Miscellaneous
1 39 (5.95%) Device Driver
2 35 (5.34%) Linux Command Line
3 32 (4.88%) Public Cloud
4 25 (3.81%) Data Centre
4 25 (3.81%) Replication
5 22 (3.35%) Analytical Skills
6 21 (3.20%) Management Information System
7 19 (2.90%) Computer Science
8 18 (2.74%) PKI
9 17 (2.59%) Private Cloud
10 16 (2.44%) Clustering
11 8 (1.22%) Self-Motivation
12 7 (1.07%) Algorithms
12 7 (1.07%) Wiki
13 6 (0.91%) Freedom of Information
13 6 (0.91%) Freedom of Information Act
14 5 (0.76%) Fat Client
14 5 (0.76%) Thin Client
14 5 (0.76%) Video on Demand
15 4 (0.61%) Mobile App
Operating Systems
1 656 (100.00%) Linux
2 308 (46.95%) Red Hat Enterprise Linux
3 169 (25.76%) Ubuntu
3 169 (25.76%) Windows
4 108 (16.46%) Unix
5 79 (12.04%) Windows Server
6 44 (6.71%) Debian
7 42 (6.40%) Solaris
8 30 (4.57%) Windows Server 2008
9 27 (4.12%) Windows 10
10 23 (3.51%) Fedora
11 21 (3.20%) CoreOS
12 16 (2.44%) AIX
12 16 (2.44%) Windows Server 2012
13 15 (2.29%) SUSE
14 12 (1.83%) DC/OS
15 10 (1.52%) Windows 7
16 9 (1.37%) HPUX
16 9 (1.37%) VMS
17 5 (0.76%) FreeBSD
Processes & Methodologies
1 394 (60.06%) DevOps
2 215 (32.77%) Agile Software Development
3 157 (23.93%) Configuration Management
4 147 (22.41%) Continuous Integration
5 69 (10.52%) Scrum
6 63 (9.60%) Open Source
7 58 (8.84%) Continuous Delivery
7 58 (8.84%) Immutable Infrastructure
8 54 (8.23%) Microservices
9 53 (8.08%) Problem-Solving
10 45 (6.86%) High Availability
11 44 (6.71%) ITIL
11 44 (6.71%) Test Automation
12 33 (5.03%) Migration
13 31 (4.73%) Deployment Automation
14 30 (4.57%) Site Reliability Engineering
15 29 (4.42%) Load Balancing
16 27 (4.12%) Disaster Recovery
16 27 (4.12%) Infrastructure Engineering
16 27 (4.12%) Mentoring
Programming Languages
1 270 (41.16%) Python
2 228 (34.76%) Bash Shell
3 132 (20.12%) Java
4 91 (13.87%) Perl
5 85 (12.96%) Shell Script
6 70 (10.67%) PowerShell
7 67 (10.21%) SQL
8 61 (9.30%) Ruby
9 59 (8.99%) Go
10 53 (8.08%) JavaScript
11 41 (6.25%) Groovy
12 34 (5.18%) PHP
13 21 (3.20%) C++
14 19 (2.90%) C#
15 12 (1.83%) C
16 11 (1.68%) PL/SQL
17 10 (1.52%) Bourne shell
18 9 (1.37%) Scala
19 8 (1.22%) AWK
19 8 (1.22%) Korn
Qualifications
1 170 (25.91%) Security Cleared
2 121 (18.45%) SC Cleared
3 38 (5.79%) DV Cleared
4 20 (3.05%) Degree
5 13 (1.98%) Computer Science Degree
6 11 (1.68%) Cisco Certification
7 9 (1.37%) CCNA
8 8 (1.22%) Microsoft Certification
9 7 (1.07%) RHCE
10 6 (0.91%) BPSS Clearance
10 6 (0.91%) RHCSA
11 4 (0.61%) AWS Certification
11 4 (0.61%) CISSP
11 4 (0.61%) MCSA
11 4 (0.61%) OCA
11 4 (0.61%) OCP
11 4 (0.61%) Oracle Certification
11 4 (0.61%) VCAP
11 4 (0.61%) VCDX
12 2 (0.30%) MCSE
Quality Assurance & Compliance
1 40 (6.10%) QA
2 18 (2.74%) GCP
3 7 (1.07%) ISO/IEC 27001
4 4 (0.61%) FedRAMP
5 3 (0.46%) JSP 440
6 2 (0.30%) COBIT
6 2 (0.30%) MiFID
6 2 (0.30%) Sarbanes-Oxley
6 2 (0.30%) SLA
7 1 (0.15%) Data Quality
7 1 (0.15%) Disclosure Scotland
7 1 (0.15%) Government Security Classifications
7 1 (0.15%) PMO
7 1 (0.15%) TickIT
System Software
1 301 (45.88%) Docker
2 93 (14.18%) VMware Infrastructure
3 66 (10.06%) Active Directory
4 48 (7.32%) Virtual Machines
5 40 (6.10%) Hyper-V
5 40 (6.10%) VMware ESXi
6 36 (5.49%) VirtualBox
7 21 (3.20%) Apache ZooKeeper
8 18 (2.74%) KVM
9 17 (2.59%) vCloud
9 17 (2.59%) vSphere
9 17 (2.59%) Xen
10 14 (2.13%) Postfix
10 14 (2.13%) Squid
11 10 (1.52%) iptables
12 9 (1.37%) NFS
12 9 (1.37%) Varnish
13 7 (1.07%) GlusterFS
13 7 (1.07%) Samba
13 7 (1.07%) Veritas Cluster Server
Systems Management
1 319 (48.63%) Ansible
2 306 (46.65%) Puppet
3 213 (32.47%) Terraform
4 187 (28.51%) Kubernetes
5 104 (15.85%) Nagios
6 103 (15.70%) Opscode Chef
7 73 (11.13%) Packer
8 70 (10.67%) Grafana
9 65 (9.91%) Prometheus
10 49 (7.47%) Icinga
10 49 (7.47%) Kibana
11 46 (7.01%) logstash
12 37 (5.64%) Salt
13 36 (5.49%) ZABBIX
14 35 (5.34%) Docker Swarm
15 30 (4.57%) Consul
15 30 (4.57%) Rancher
16 24 (3.66%) vCenter Server
17 19 (2.90%) Galera Cluster
17 19 (2.90%) HAProxy
Vendors
1 305 (46.49%) Red Hat
2 163 (24.85%) VMware
3 76 (11.59%) Splunk
4 75 (11.43%) Google
4 75 (11.43%) Microsoft
5 50 (7.62%) Oracle
6 41 (6.25%) Cisco
7 39 (5.95%) NetApp
8 34 (5.18%) New Relic
9 33 (5.03%) Black Duck
10 24 (3.66%) Hortonworks
11 21 (3.20%) HP
12 19 (2.90%) AppDynamics
13 15 (2.29%) SaltStack
14 13 (1.98%) Atlassian
15 11 (1.68%) CheckPoint
15 11 (1.68%) Juniper
16 10 (1.52%) Citrix
16 10 (1.52%) Cloudera
17 9 (1.37%) Rackspace