Period
to 16 October 2018

The following table provides summary statistics for contract job vacancies advertised in London 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 16 October 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
England > London
6 months to
16 Oct 2018
Same period 2017 Same period 2016
Rank 340 320 252
Rank change year-on-year -20 -68 +94
Contract jobs citing CentOS 312 344 459
As % of all contract IT jobs advertised in London 0.68% 0.77% 1.03%
As % of the Operating Systems category 3.35% 3.70% 4.89%
Number of daily rates quoted 203 251 290
London median daily rate £550 £500 £500
Median daily rate % change year-on-year +10.00% - +17.65%
10th Percentile £390 £363 £370
90th Percentile £638 £600 £601
England median daily rate £500 £475 £463
% change year-on-year +5.26% +2.70% +8.82%
Number of hourly rates quoted 0 5 0
London median hourly rate - £29.00 -
England median hourly rate £47.33 £32.88 £13.50
% change year-on-year +43.97% +143.52% -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 London with a requirement for operating system skills.

All Operating Systems
London
Contract vacancies with a requirement for operating system skills 9,319 9,285 9,379
As % of all contract IT jobs advertised in London 20.18% 20.66% 21.11%
Number of daily rates quoted 6,577 6,549 6,538
London median daily rate £488 £475 £450
Median daily rate % change year-on-year +2.63% +5.56% +5.88%
10th Percentile £193 £208 £250
90th Percentile £650 £627 £600
England median daily rate £435 £425 £410
% change year-on-year +2.35% +3.66% +5.81%
Number of hourly rates quoted 289 263 208
London median hourly rate £18.70 £19.00 £18.00
Median hourly rate % change year-on-year -1.58% +5.56% +2.68%
10th Percentile £12.95 £12.10 £11.25
90th Percentile £47.83 £47.83 £43.75
England median hourly rate £17.50 £17.50 £16.50
% change year-on-year - +6.06% -

CentOS
Job Vacancy Trend in London

Job postings citing CentOS as a percentage of all IT jobs advertised in London.

Job vacancy trend for CentOS in London

CentOS
Contractor Daily Rate Trend in London

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

Contractor daily rate trend for CentOS in London

CentOS
Contractor Daily Rate Histogram in London

The daily rate distribution of IT jobs citing CentOS in London over the 6 months to 16 October 2018.

Contractor daily rate histogram for CentOS in London

CentOS
Contractor Hourly Rate Trend in London

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

Contractor hourly rate trend for CentOS in London

CentOS
Contract Job Locations in London

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the London region over the 6 months to 16 October 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
Central London -4 61 £550 +10.00% 21
South London -31 55 £475 +14.80% 7
West London -32 12 £525 - 16
East London -27 1 £675 +17.39% 5
CentOS
England

For the 6 months to 16 October 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 London region with a requirement for CentOS.

1 312 (100.00%) Linux
2 205 (65.71%) DevOps
3 155 (49.68%) Jenkins
4 151 (48.40%) Docker
5 145 (46.47%) Ansible
6 136 (43.59%) Red Hat
7 124 (39.74%) Python
7 124 (39.74%) Amazon AWS
7 124 (39.74%) Bash Shell
8 123 (39.42%) Puppet
9 122 (39.10%) Agile Software Development
10 117 (37.50%) Red Hat Enterprise Linux
11 111 (35.58%) Terraform
12 102 (32.69%) Kubernetes
13 100 (32.05%) Git (software)
14 99 (31.73%) Ubuntu
15 94 (30.13%) Continuous Integration
16 92 (29.49%) Java
17 82 (26.28%) VMware
18 81 (25.96%) Windows
19 78 (25.00%) Security Cleared
20 58 (18.59%) SC Cleared
21 57 (18.27%) Configuration Management
22 56 (17.95%) GitHub
23 55 (17.63%) Nagios
24 51 (16.35%) Immutable Infrastructure
25 49 (15.71%) Google
25 49 (15.71%) Go
26 48 (15.38%) Maven
27 47 (15.06%) Kafka

CentOS
Co-occurring IT Skills in London 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 45 (14.42%) Apache
2 37 (11.86%) Tomcat
3 32 (10.26%) OpenStack
4 25 (8.01%) Confluence
5 19 (6.09%) Elasticsearch
6 17 (5.45%) nginx
7 16 (5.13%) IIS
7 16 (5.13%) Jetty
8 15 (4.81%) JBoss
8 15 (4.81%) Mongrel
8 15 (4.81%) WebSphere
9 3 (0.96%) Oracle SOA Suite
10 2 (0.64%) Apache Spark
10 2 (0.64%) CMS
10 2 (0.64%) Drupal
11 1 (0.32%) Exchange Server 2013
11 1 (0.32%) MS Exchange
11 1 (0.32%) Mule ESB
11 1 (0.32%) WildFly
Applications
1 4 (1.28%) Microsoft Office
2 2 (0.64%) HipChat
Cloud Services
1 124 (39.74%) Amazon AWS
2 56 (17.95%) GitHub
3 46 (14.74%) Microsoft Azure
4 42 (13.46%) Amazon EC2
5 34 (10.90%) AWS CloudFormation
6 26 (8.33%) Virtual Private Cloud
7 25 (8.01%) Amazon S3
8 21 (6.73%) Amazon CloudWatch
9 20 (6.41%) Cloud Computing
10 19 (6.09%) Google Cloud Platform
11 13 (4.17%) Amazon ELB
11 13 (4.17%) Sumo Logic
12 12 (3.85%) Datadog
13 8 (2.56%) IaaS
14 6 (1.92%) AWS Lambda
14 6 (1.92%) Serverless
15 5 (1.60%) Office 365
16 4 (1.28%) Google App Engine
16 4 (1.28%) Rackspace Cloud
17 3 (0.96%) OpenShift
Communications & Networking
1 28 (8.97%) HTTP
2 23 (7.37%) Firewall
3 20 (6.41%) DNS
4 15 (4.81%) Intrusion Detection
5 14 (4.49%) SSH
6 13 (4.17%) VPN
7 12 (3.85%) OpenLDAP
8 9 (2.88%) OpenVPN
9 8 (2.56%) TCP/IP
10 7 (2.24%) DHCP
10 7 (2.24%) Ethernet
11 6 (1.92%) FTP
12 4 (1.28%) AMQP
12 4 (1.28%) LAN
12 4 (1.28%) MQTT
12 4 (1.28%) SMTP
12 4 (1.28%) WAN
13 3 (0.96%) GoToMeeting
13 3 (0.96%) SMS
13 3 (0.96%) VoIP
Database & Business Intelligence
1 35 (11.22%) MongoDB
2 32 (10.26%) PostgreSQL
3 30 (9.62%) Amazon RDS
4 28 (8.97%) MySQL
5 17 (5.45%) NoSQL
5 17 (5.45%) SQL Server
6 15 (4.81%) Apache Cassandra
7 13 (4.17%) SQL Server 2016
8 8 (2.56%) Big Data
9 7 (2.24%) Hadoop
10 5 (1.60%) HBase
11 4 (1.28%) Amazon Redshift
12 2 (0.64%) Apache Hive
12 2 (0.64%) Azure SQL Database
12 2 (0.64%) Relational Database
13 1 (0.32%) Amazon DynamoDB
13 1 (0.32%) Oracle Database
13 1 (0.32%) Redis
13 1 (0.32%) SQLite
13 1 (0.32%) Talend Open Studio
Development Applications
1 155 (49.68%) Jenkins
2 100 (32.05%) Git (software)
3 48 (15.38%) Maven
4 46 (14.74%) Vagrant
5 37 (11.86%) JIRA
6 28 (8.97%) GitLab
6 28 (8.97%) Sonatype Nexus
7 26 (8.33%) Atlassian Bamboo
8 24 (7.69%) Ant
9 21 (6.73%) Travis CI
10 18 (5.77%) Artifactory
11 16 (5.13%) Gradle
12 15 (4.81%) CruiseControl
12 15 (4.81%) MSBuild
12 15 (4.81%) SonarQube
12 15 (4.81%) TeamCity
13 14 (4.49%) Bitbucket
13 14 (4.49%) JUnit
14 9 (2.88%) Liquibase
14 9 (2.88%) Subversion
General
1 15 (4.81%) Finance
2 13 (4.17%) Telecoms
3 8 (2.56%) Banking
4 5 (1.60%) Marketing
5 4 (1.28%) Manufacturing
6 3 (0.96%) Retail
7 2 (0.64%) Advertising
7 2 (0.64%) Electronics
7 2 (0.64%) Games
7 2 (0.64%) Legal
7 2 (0.64%) Publishing
8 1 (0.32%) Aerospace
8 1 (0.32%) Automotive
8 1 (0.32%) Financial Institution
8 1 (0.32%) Investment Banking
8 1 (0.32%) Pharmaceutical
Job Titles
1 171 (54.81%) DevOps Engineer
2 52 (16.67%) AWS DevOps
3 49 (15.71%) Linux Engineer
4 45 (14.42%) AWS Engineer
5 44 (14.10%) AWS DevOps Engineer
6 26 (8.33%) Senior DevOps
7 25 (8.01%) Administrator
7 25 (8.01%) Linux/Unix DevOps
8 24 (7.69%) Senior DevOps Engineer
8 24 (7.69%) Systems Administrator
9 21 (6.73%) Linux DevOps Engineer
10 16 (5.13%) VMware Engineer
11 15 (4.81%) Azure Engineer
12 14 (4.49%) AWS Administrator
12 14 (4.49%) Azure DevOps
12 14 (4.49%) Azure DevOps Engineer
12 14 (4.49%) Developer
12 14 (4.49%) Infrastructure Engineer
12 14 (4.49%) Systems Engineer
13 13 (4.17%) Kubernetes Engineer
Libraries, Frameworks & Software Standards
1 47 (15.06%) Kafka
2 37 (11.86%) Elastic Stack
3 17 (5.45%) REST
4 15 (4.81%) JRuby
4 15 (4.81%) Servlets
4 15 (4.81%) Web Services
5 11 (3.53%) ActiveMQ
6 10 (3.21%) LAMP
7 9 (2.88%) MCollective
8 8 (2.56%) Gherkin
8 8 (2.56%) JSON
9 7 (2.24%) XML
10 6 (1.92%) LDAP
11 5 (1.60%) Apache POI
11 5 (1.60%) CSS
11 5 (1.60%) HTML
12 3 (0.96%) AngularJS
12 3 (0.96%) HTML5
12 3 (0.96%) JSP
12 3 (0.96%) OSGi
Miscellaneous
1 34 (10.90%) Device Driver
2 20 (6.41%) Data Centre
2 20 (6.41%) Linux Command Line
3 15 (4.81%) Public Cloud
4 14 (4.49%) Computer Science
5 11 (3.53%) Replication
6 9 (2.88%) Analytical Skills
6 9 (2.88%) Clustering
6 9 (2.88%) Management Information System
6 9 (2.88%) Private Cloud
7 6 (1.92%) Freedom of Information
7 6 (1.92%) Freedom of Information Act
8 5 (1.60%) Algorithms
8 5 (1.60%) Self-Motivation
9 4 (1.28%) Mobile App
10 3 (0.96%) Data Structures
10 3 (0.96%) Digital Media
10 3 (0.96%) Fat Client
10 3 (0.96%) Fintech
10 3 (0.96%) Thin Client
Operating Systems
1 312 (100.00%) Linux
2 117 (37.50%) Red Hat Enterprise Linux
3 99 (31.73%) Ubuntu
4 81 (25.96%) Windows
5 47 (15.06%) Windows Server
6 24 (7.69%) Unix
7 18 (5.77%) Debian
8 16 (5.13%) Windows Server 2008
9 15 (4.81%) CoreOS
9 15 (4.81%) Fedora
10 13 (4.17%) Windows 10
11 9 (2.88%) Solaris
12 7 (2.24%) DC/OS
12 7 (2.24%) SUSE
13 5 (1.60%) VMS
14 3 (0.96%) Mesosphere
14 3 (0.96%) Windows Server 2012
15 2 (0.64%) Android
15 2 (0.64%) HPUX
15 2 (0.64%) Mac OS X
Processes & Methodologies
1 205 (65.71%) DevOps
2 122 (39.10%) Agile Software Development
3 94 (30.13%) Continuous Integration
4 57 (18.27%) Configuration Management
5 51 (16.35%) Immutable Infrastructure
6 42 (13.46%) Scrum
7 40 (12.82%) Continuous Delivery
8 32 (10.26%) High Availability
9 30 (9.62%) Open Source
10 27 (8.65%) Problem-Solving
10 27 (8.65%) Site Reliability Engineering
11 22 (7.05%) Deployment Automation
12 20 (6.41%) Test Automation
13 19 (6.09%) Infrastructure Engineering
14 17 (5.45%) Release Management
15 16 (5.13%) Load Balancing
16 15 (4.81%) Mentoring
16 15 (4.81%) Security Hardening
17 14 (4.49%) Cloud Operations
17 14 (4.49%) Migration
Programming Languages
1 124 (39.74%) Bash Shell
1 124 (39.74%) Python
2 92 (29.49%) Java
3 49 (15.71%) Go
4 39 (12.50%) PowerShell
5 37 (11.86%) Groovy
6 32 (10.26%) SQL
7 27 (8.65%) Shell Script
8 25 (8.01%) Perl
8 25 (8.01%) Ruby
9 19 (6.09%) JavaScript
10 15 (4.81%) C#
11 10 (3.21%) C++
12 8 (2.56%) Scala
13 5 (1.60%) PHP
14 4 (1.28%) PL/SQL
15 3 (0.96%) C
16 1 (0.32%) Bourne shell
16 1 (0.32%) XPath
Qualifications
1 78 (25.00%) Security Cleared
2 58 (18.59%) SC Cleared
3 15 (4.81%) Degree
4 13 (4.17%) DV Cleared
5 12 (3.85%) Computer Science Degree
6 4 (1.28%) AWS Certification
6 4 (1.28%) Microsoft Certification
6 4 (1.28%) VCAP
6 4 (1.28%) VCDX
7 3 (0.96%) MCSA
8 1 (0.32%) CCNA
8 1 (0.32%) Cisco Certification
8 1 (0.32%) CISM
8 1 (0.32%) CISSP
8 1 (0.32%) PMI Certification
8 1 (0.32%) PMP
8 1 (0.32%) RHCA
8 1 (0.32%) RHCE
8 1 (0.32%) RHCSA
Quality Assurance & Compliance
1 20 (6.41%) QA
2 7 (2.24%) FedRAMP
3 4 (1.28%) ISO/IEC 27001
4 1 (0.32%) PMO
System Software
1 151 (48.40%) Docker
2 44 (14.10%) VMware Infrastructure
3 26 (8.33%) VirtualBox
4 24 (7.69%) Hyper-V
5 22 (7.05%) Virtual Machines
6 20 (6.41%) Active Directory
7 16 (5.13%) vCloud
7 16 (5.13%) VMware ESXi
8 15 (4.81%) Apache ZooKeeper
9 11 (3.53%) Squid
10 9 (2.88%) Postfix
10 9 (2.88%) vSphere
11 7 (2.24%) KVM
11 7 (2.24%) Virtual Servers
12 6 (1.92%) Xen
13 5 (1.60%) Slurm Workload Manager
14 2 (0.64%) VMware Workstation
15 1 (0.32%) VMware NSX
Systems Management
1 145 (46.47%) Ansible
2 123 (39.42%) Puppet
3 111 (35.58%) Terraform
4 102 (32.69%) Kubernetes
5 55 (17.63%) Nagios
6 41 (13.14%) Opscode Chef
7 35 (11.22%) Grafana
7 35 (11.22%) Icinga
7 35 (11.22%) Prometheus
8 34 (10.90%) Packer
9 32 (10.26%) Kibana
9 32 (10.26%) logstash
10 28 (8.97%) Docker Swarm
11 18 (5.77%) Salt
11 18 (5.77%) ZABBIX
12 15 (4.81%) Galera Cluster
13 14 (4.49%) Graylog
14 13 (4.17%) vCenter Server
15 10 (3.21%) Rancher
16 9 (2.88%) Consul
Vendors
1 136 (43.59%) Red Hat
2 82 (26.28%) VMware
3 49 (15.71%) Google
4 46 (14.74%) Splunk
5 34 (10.90%) Microsoft
6 27 (8.65%) Cisco
7 22 (7.05%) New Relic
8 17 (5.45%) Hortonworks
9 15 (4.81%) NetApp
10 14 (4.49%) AppDynamics
11 13 (4.17%) Atlassian
12 10 (3.21%) Black Duck
12 10 (3.21%) Oracle
13 9 (2.88%) Sonatype
14 7 (2.24%) SaltStack
14 7 (2.24%) ServiceNow
15 6 (1.92%) Cloudera
15 6 (1.92%) IBM
16 5 (1.60%) Rackspace
17 4 (1.28%) Citrix