Period
to 18 August 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 18 August 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
18 Aug 2018
Same period 2017 Same period 2016
Rank 317 298 270
Rank change year-on-year -19 -28 +112
Contract jobs citing CentOS 346 357 419
As % of all contract IT jobs advertised in London 0.75% 0.83% 0.93%
As % of the Operating Systems category 3.68% 4.04% 4.38%
Number of daily rates quoted 228 283 276
London median daily rate £550 £513 £500
Median daily rate % change year-on-year +7.32% +2.50% +14.29%
10th Percentile £400 £363 £375
90th Percentile £638 £610 £605
England median daily rate £500 £500 £450
% change year-on-year - +11.11% +12.50%
Number of hourly rates quoted 1 1 0
London median hourly rate £52.50 £40.00 -
Median hourly rate % change year-on-year +31.25% - -
England median hourly rate £51.00 £43.75 £13.50
% change year-on-year +16.57% +224.07% -60.29%

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 9,404 8,843 9,575
As % of all contract IT jobs advertised in London 20.50% 20.53% 21.19%
Number of daily rates quoted 6,660 6,180 6,789
London median daily rate £488 £475 £450
Median daily rate % change year-on-year +2.63% +5.56% +5.88%
10th Percentile £203 £230 £250
90th Percentile £650 £625 £600
England median daily rate £438 £425 £402
% change year-on-year +2.94% +5.72% +7.20%
Number of hourly rates quoted 315 236 195
London median hourly rate £19.00 £20.00 £17.00
Median hourly rate % change year-on-year -5.00% +17.65% -5.56%
10th Percentile £13.00 £12.63 £11.25
90th Percentile £47.83 £49.60 £42.50
England median hourly rate £17.50 £17.39 £16.50
% change year-on-year +0.63% +5.39% -

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 18 August 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 18 August 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 -8 69 £550 +15.79% 21
South London -20 67 £500 +11.11% 3
West London -42 14 £525 - 9
East London -22 2 £675 +12.50% 3
CentOS
England

For the 6 months to 18 August 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.

1 346 (100.00%) Linux
2 232 (67.05%) DevOps
3 189 (54.62%) Jenkins
4 176 (50.87%) Docker
5 156 (45.09%) Ansible
6 148 (42.77%) Agile Software Development
7 143 (41.33%) Python
8 142 (41.04%) Amazon AWS
9 138 (39.88%) Red Hat
10 136 (39.31%) Red Hat Enterprise Linux
11 134 (38.73%) Puppet
12 129 (37.28%) Bash Shell
13 127 (36.71%) Kubernetes
14 124 (35.84%) Terraform
15 122 (35.26%) Ubuntu
16 116 (33.53%) Git (software)
16 116 (33.53%) Continuous Integration
17 105 (30.35%) Security Cleared
18 95 (27.46%) Java
19 91 (26.30%) VMware
20 88 (25.43%) Windows
21 76 (21.97%) SC Cleared
22 72 (20.81%) Configuration Management
23 61 (17.63%) GitHub
24 59 (17.05%) Google
25 58 (16.76%) Splunk
25 58 (16.76%) Windows Server
26 57 (16.47%) Microsoft Azure
27 55 (15.90%) Scrum
27 55 (15.90%) Immutable Infrastructure

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 53 (15.32%) Apache
2 43 (12.43%) Tomcat
3 31 (8.96%) Confluence
4 28 (8.09%) OpenStack
5 26 (7.51%) Elasticsearch
6 19 (5.49%) nginx
7 18 (5.20%) Jetty
8 17 (4.91%) JBoss
9 12 (3.47%) IIS
10 10 (2.89%) Mongrel
10 10 (2.89%) WebSphere
11 7 (2.02%) Apache Spark
12 5 (1.45%) Mule ESB
12 5 (1.45%) WildFly
13 4 (1.16%) Oracle SOA Suite
14 3 (0.87%) Oracle Self-Service HR
14 3 (0.87%) WebLogic
15 2 (0.58%) Apache Solr
16 1 (0.29%) Apache Pig
16 1 (0.29%) Drupal
Applications
1 4 (1.16%) Microsoft Office
2 3 (0.87%) Microsoft Excel
3 2 (0.58%) HipChat
Cloud Services
1 142 (41.04%) Amazon AWS
2 61 (17.63%) GitHub
3 57 (16.47%) Microsoft Azure
4 47 (13.58%) Amazon EC2
5 34 (9.83%) AWS CloudFormation
6 32 (9.25%) Amazon CloudWatch
7 31 (8.96%) Virtual Private Cloud
8 28 (8.09%) Amazon S3
8 28 (8.09%) Google Cloud Platform
9 21 (6.07%) Datadog
10 15 (4.34%) Cloud Computing
11 14 (4.05%) Amazon ELB
12 10 (2.89%) Sumo Logic
13 6 (1.73%) Google App Engine
13 6 (1.73%) Rackspace Cloud
14 5 (1.45%) AWS Lambda
14 5 (1.45%) Serverless
15 4 (1.16%) Office 365
15 4 (1.16%) OpenShift
16 2 (0.58%) IaaS
Communications & Networking
1 38 (10.98%) Firewall
2 24 (6.94%) HTTP
3 21 (6.07%) DNS
4 19 (5.49%) Intrusion Detection
5 18 (5.20%) VPN
6 17 (4.91%) SSH
7 13 (3.76%) OpenLDAP
8 9 (2.60%) OpenVPN
8 9 (2.60%) TCP/IP
9 7 (2.02%) Reverse Proxy
10 6 (1.73%) DHCP
10 6 (1.73%) Ethernet
10 6 (1.73%) FTP
11 5 (1.45%) Cisco Nexus
11 5 (1.45%) SMTP
12 4 (1.16%) Kerberos
12 4 (1.16%) LAN
12 4 (1.16%) SMS
12 4 (1.16%) WAN
13 3 (0.87%) MQTT
Database & Business Intelligence
1 48 (13.87%) PostgreSQL
2 44 (12.72%) MongoDB
3 39 (11.27%) MySQL
4 34 (9.83%) Amazon RDS
5 24 (6.94%) SQL Server
6 20 (5.78%) NoSQL
7 19 (5.49%) SQL Server 2016
8 16 (4.62%) Apache Cassandra
9 15 (4.34%) Hadoop
10 12 (3.47%) Big Data
11 7 (2.02%) HBase
12 5 (1.45%) Amazon Redshift
13 4 (1.16%) Apache Hive
13 4 (1.16%) Azure SQL Database
13 4 (1.16%) Oracle Database
13 4 (1.16%) Relational Database
14 2 (0.58%) MariaDB
14 2 (0.58%) RDBMS
15 1 (0.29%) Data Mining
15 1 (0.29%) Data Warehouse
Development Applications
1 189 (54.62%) Jenkins
2 116 (33.53%) Git (software)
3 50 (14.45%) Vagrant
4 49 (14.16%) Maven
5 44 (12.72%) JIRA
6 35 (10.12%) GitLab
7 34 (9.83%) Sonatype Nexus
8 33 (9.54%) Atlassian Bamboo
9 23 (6.65%) Travis CI
10 22 (6.36%) Ant
10 22 (6.36%) Artifactory
11 21 (6.07%) Bitbucket
12 20 (5.78%) JUnit
13 14 (4.05%) Subversion
14 13 (3.76%) Cucumber
14 13 (3.76%) Gradle
14 13 (3.76%) Mercurial
15 12 (3.47%) TeamCity
16 10 (2.89%) MSBuild
16 10 (2.89%) Selenium
General
1 15 (4.34%) Finance
1 15 (4.34%) Telecoms
2 12 (3.47%) Banking
3 6 (1.73%) Legal
4 5 (1.45%) Games
4 5 (1.45%) Marketing
5 4 (1.16%) Investment Banking
6 3 (0.87%) Retail
7 2 (0.58%) Advertising
7 2 (0.58%) Electronics
7 2 (0.58%) Manufacturing
8 1 (0.29%) Automotive
8 1 (0.29%) Financial Institution
8 1 (0.29%) Law
Job Titles
1 181 (52.31%) DevOps Engineer
2 45 (13.01%) Linux Engineer
3 44 (12.72%) AWS DevOps
4 36 (10.40%) AWS Engineer
5 34 (9.83%) AWS DevOps Engineer
6 30 (8.67%) Senior DevOps
7 29 (8.38%) Administrator
8 28 (8.09%) Senior DevOps Engineer
9 26 (7.51%) Linux/Unix DevOps
10 25 (7.23%) Systems Administrator
11 22 (6.36%) Linux DevOps Engineer
12 21 (6.07%) Developer
13 17 (4.91%) AWS Administrator
13 17 (4.91%) Consultant
13 17 (4.91%) Network Engineer
14 16 (4.62%) Infrastructure Engineer
14 16 (4.62%) Unix Administrator
15 15 (4.34%) Unix Systems Administrator
16 13 (3.76%) Operations Engineer
16 13 (3.76%) Systems Engineer
Libraries, Frameworks & Software Standards
1 51 (14.74%) Kafka
2 49 (14.16%) Elastic Stack
3 20 (5.78%) Web Services
4 18 (5.20%) ActiveMQ
4 18 (5.20%) REST
5 17 (4.91%) LAMP
6 10 (2.89%) Gherkin
6 10 (2.89%) JRuby
6 10 (2.89%) Servlets
6 10 (2.89%) Spring
6 10 (2.89%) XML
7 9 (2.60%) JSON
7 9 (2.60%) MCollective
7 9 (2.60%) RabbitMQ
8 7 (2.02%) Apache POI
8 7 (2.02%) LAPP Stack
8 7 (2.02%) LDAP
8 7 (2.02%) LEMP Stack
9 6 (1.73%) Hibernate
9 6 (1.73%) HTML
Miscellaneous
1 36 (10.40%) Device Driver
2 30 (8.67%) Linux Command Line
3 21 (6.07%) Analytical Skills
4 16 (4.62%) Data Centre
5 15 (4.34%) Clustering
5 15 (4.34%) Replication
6 13 (3.76%) Public Cloud
7 12 (3.47%) Management Information System
8 10 (2.89%) Private Cloud
9 8 (2.31%) Algorithms
9 8 (2.31%) Freedom of Information
9 8 (2.31%) Freedom of Information Act
10 7 (2.02%) Computer Science
10 7 (2.02%) Self-Motivation
11 5 (1.45%) Mobile App
12 4 (1.16%) Fintech
12 4 (1.16%) Wiki
13 3 (0.87%) Data Structures
13 3 (0.87%) Digital Media
13 3 (0.87%) User Experience
Operating Systems
1 346 (100.00%) Linux
2 136 (39.31%) Red Hat Enterprise Linux
3 122 (35.26%) Ubuntu
4 88 (25.43%) Windows
5 58 (16.76%) Windows Server
6 27 (7.80%) Unix
7 23 (6.65%) Windows Server 2008
8 19 (5.49%) CoreOS
8 19 (5.49%) Windows 10
9 18 (5.20%) DC/OS
9 18 (5.20%) Debian
10 10 (2.89%) Fedora
10 10 (2.89%) Solaris
11 8 (2.31%) VMS
12 7 (2.02%) SUSE
13 6 (1.73%) Android
14 4 (1.16%) Windows Server 2012
15 3 (0.87%) Apple iOS
15 3 (0.87%) Mac OS X
15 3 (0.87%) Mesosphere
Processes & Methodologies
1 232 (67.05%) DevOps
2 148 (42.77%) Agile Software Development
3 116 (33.53%) Continuous Integration
4 72 (20.81%) Configuration Management
5 55 (15.90%) Immutable Infrastructure
5 55 (15.90%) Scrum
6 42 (12.14%) Continuous Delivery
7 38 (10.98%) Problem-Solving
8 37 (10.69%) Open Source
9 33 (9.54%) Test Automation
10 30 (8.67%) High Availability
11 26 (7.51%) Site Reliability Engineering
12 23 (6.65%) SDLC
13 21 (6.07%) Mentoring
14 20 (5.78%) Infrastructure Engineering
14 20 (5.78%) Load Balancing
14 20 (5.78%) Storage Management
15 19 (5.49%) Security Hardening
16 18 (5.20%) Deployment Automation
17 17 (4.91%) Release Management
Programming Languages
1 143 (41.33%) Python
2 129 (37.28%) Bash Shell
3 95 (27.46%) Java
4 50 (14.45%) SQL
5 46 (13.29%) Go
6 43 (12.43%) Groovy
7 34 (9.83%) PowerShell
8 27 (7.80%) Ruby
9 25 (7.23%) Shell Script
10 23 (6.65%) Perl
11 15 (4.34%) C++
12 14 (4.05%) JavaScript
12 14 (4.05%) Scala
13 9 (2.60%) C#
13 9 (2.60%) PL/SQL
14 6 (1.73%) PHP
15 3 (0.87%) C
15 3 (0.87%) Clojure
15 3 (0.87%) T-SQL
15 3 (0.87%) VBA
Qualifications
1 105 (30.35%) Security Cleared
2 76 (21.97%) SC Cleared
3 25 (7.23%) DV Cleared
4 8 (2.31%) Degree
5 6 (1.73%) Computer Science Degree
6 5 (1.45%) Microsoft Certification
7 4 (1.16%) VCAP
7 4 (1.16%) VCDX
8 3 (0.87%) AWS Certification
8 3 (0.87%) MCSA
9 2 (0.58%) Cisco Certification
9 2 (0.58%) PMI Certification
9 2 (0.58%) PMP
9 2 (0.58%) RHCE
9 2 (0.58%) RHCSA
10 1 (0.29%) CCNA
10 1 (0.29%) CISM
10 1 (0.29%) CISSP
10 1 (0.29%) MCP
10 1 (0.29%) RHCA
Quality Assurance & Compliance
1 24 (6.94%) QA
2 11 (3.18%) GCP
3 4 (1.16%) ISO/IEC 27001
4 2 (0.58%) FedRAMP
4 2 (0.58%) MiFID
5 1 (0.29%) PMO
System Software
1 176 (50.87%) Docker
2 45 (13.01%) VMware Infrastructure
3 35 (10.12%) Virtual Machines
4 29 (8.38%) VirtualBox
5 26 (7.51%) Hyper-V
6 21 (6.07%) Active Directory
6 21 (6.07%) VMware ESXi
7 19 (5.49%) Apache ZooKeeper
8 16 (4.62%) vCloud
9 12 (3.47%) Xen
10 11 (3.18%) Squid
11 9 (2.60%) Postfix
11 9 (2.60%) vSphere
12 8 (2.31%) KVM
13 6 (1.73%) Slurm Workload Manager
14 2 (0.58%) Virtual Servers
15 1 (0.29%) NFS
15 1 (0.29%) VMware NSX
Systems Management
1 156 (45.09%) Ansible
2 134 (38.73%) Puppet
3 127 (36.71%) Kubernetes
4 124 (35.84%) Terraform
5 54 (15.61%) Nagios
6 47 (13.58%) Opscode Chef
7 43 (12.43%) Packer
8 40 (11.56%) Docker Swarm
9 36 (10.40%) Grafana
9 36 (10.40%) Icinga
9 36 (10.40%) Prometheus
10 30 (8.67%) Kibana
10 30 (8.67%) logstash
11 24 (6.94%) ZABBIX
12 20 (5.78%) Galera Cluster
13 19 (5.49%) vCenter Server
14 16 (4.62%) Salt
15 12 (3.47%) Consul
16 10 (2.89%) Graylog
16 10 (2.89%) Rancher
Vendors
1 138 (39.88%) Red Hat
2 91 (26.30%) VMware
3 59 (17.05%) Google
4 58 (16.76%) Splunk
5 32 (9.25%) Microsoft
6 29 (8.38%) Cisco
7 27 (7.80%) New Relic
8 25 (7.23%) Hortonworks
9 19 (5.49%) NetApp
10 17 (4.91%) Oracle
11 12 (3.47%) Cloudera
12 10 (2.89%) AppDynamics
12 10 (2.89%) Black Duck
13 9 (2.60%) Atlassian
13 9 (2.60%) Sonatype
14 8 (2.31%) SaltStack
15 7 (2.02%) Rackspace
16 6 (1.73%) HP
16 6 (1.73%) IBM
17 5 (1.45%) Perforce