Period
to 22 May 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 22 May 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
22 May 2018
Same period 2017 Same period 2016
Rank 303 283 293
Rank change year-on-year -20 +10 +81
Contract jobs citing CentOS 373 342 330
As % of all contract IT jobs advertised in London 0.82% 0.87% 0.76%
As % of the Operating Systems category 4.00% 4.27% 3.66%
Number of daily rates quoted 263 267 227
London median daily rate £525 £500 £475
Median daily rate % change year-on-year +5.00% +5.26% +5.56%
10th Percentile £376 £319 £364
90th Percentile £638 £600 £600
England median daily rate £500 £488 £450
% change year-on-year +2.56% +8.33% +11.46%
Number of hourly rates quoted 1 0 3
London median hourly rate £52.50 - £50.00
10th Percentile £51.25 - £47.50
90th Percentile £53.75 - £52.50
England median hourly rate £49.50 £17.50 £50.00
% change year-on-year +182.86% -65.00% +5.26%

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 9,316 8,008 9,020
As % of all contract IT jobs advertised in London 20.43% 20.36% 20.82%
Number of daily rates quoted 6,611 5,622 6,335
London median daily rate £483 £453 £450
Median daily rate % change year-on-year +6.45% +0.72% +5.88%
10th Percentile £210 £260 £225
90th Percentile £650 £625 £606
England median daily rate £445 £425 £400
% change year-on-year +4.71% +6.25% +6.67%
Number of hourly rates quoted 318 186 246
London median hourly rate £19.50 £19.75 £17.50
Median hourly rate % change year-on-year -1.27% +12.86% -2.78%
10th Percentile £13.00 £12.50 £11.25
90th Percentile £47.83 £51.25 £45.79
England median hourly rate £17.50 £16.83 £17.00
% change year-on-year +3.97% -0.99% +5.20%

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 22 May 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 22 May 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
South London -11 72 £495 +5.88% 9
Central London -24 68 £550 +31.74% 25
West London -48 18 £525 - 16
East London -9 7 £688 +14.58% 2
North London +1 1 £329 -
CentOS
England

For the 6 months to 22 May 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.

1 373 (100.00%) Linux
2 263 (70.51%) DevOps
3 213 (57.10%) Jenkins
4 197 (52.82%) Docker
5 185 (49.60%) Red Hat Enterprise Linux
6 167 (44.77%) Agile Software Development
7 162 (43.43%) Ansible
8 161 (43.16%) Python
9 160 (42.90%) Amazon AWS
10 141 (37.80%) Kubernetes
11 140 (37.53%) Bash Shell
12 139 (37.27%) Security Cleared
13 137 (36.73%) Git (software)
14 136 (36.46%) Puppet
15 134 (35.92%) Red Hat
16 130 (34.85%) Continuous Integration
17 127 (34.05%) Ubuntu
18 122 (32.71%) Terraform
19 106 (28.42%) Java
20 96 (25.74%) SC Cleared
21 95 (25.47%) VMware
22 86 (23.06%) Windows
23 81 (21.72%) Scrum
24 67 (17.96%) MySQL
25 65 (17.43%) JIRA
25 65 (17.43%) Splunk
26 64 (17.16%) Windows Server
27 62 (16.62%) Microsoft Azure
27 62 (16.62%) PostgreSQL
27 62 (16.62%) Tomcat

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 62 (16.62%) Tomcat
2 52 (13.94%) Apache
3 45 (12.06%) Confluence
4 34 (9.12%) Elasticsearch
5 28 (7.51%) nginx
6 21 (5.63%) JBoss
6 21 (5.63%) OpenStack
7 17 (4.56%) Jetty
8 11 (2.95%) Apache Spark
9 8 (2.14%) Mule ESB
9 8 (2.14%) WildFly
10 7 (1.88%) IIS
11 5 (1.34%) Mongrel
11 5 (1.34%) WebSphere
12 4 (1.07%) Oracle SOA Suite
13 3 (0.80%) Oracle Self-Service HR
13 3 (0.80%) WebLogic
14 2 (0.54%) Apache Solr
15 1 (0.27%) Oracle Application Server
15 1 (0.27%) SharePoint
Applications
1 3 (0.80%) Microsoft Excel
2 2 (0.54%) Microsoft Office
3 1 (0.27%) HipChat
Cloud Services
1 160 (42.90%) Amazon AWS
2 62 (16.62%) Microsoft Azure
3 39 (10.46%) GitHub
4 33 (8.85%) Amazon EC2
5 30 (8.04%) Virtual Private Cloud
6 26 (6.97%) Amazon CloudWatch
7 24 (6.43%) Google Cloud Platform
8 23 (6.17%) AWS CloudFormation
9 22 (5.90%) Datadog
10 21 (5.63%) Amazon S3
11 13 (3.49%) Amazon ELB
12 9 (2.41%) Cloud Computing
13 7 (1.88%) AWS CloudTrail
13 7 (1.88%) AWS Lambda
13 7 (1.88%) Serverless
14 6 (1.61%) Azure Active Directory
15 5 (1.34%) Google App Engine
15 5 (1.34%) Rackspace Cloud
15 5 (1.34%) Sumo Logic
16 3 (0.80%) PaaS
Communications & Networking
1 58 (15.55%) Firewall
2 35 (9.38%) VPN
3 21 (5.63%) HTTP
4 20 (5.36%) DNS
4 20 (5.36%) TCP/IP
5 17 (4.56%) OpenLDAP
6 14 (3.75%) Intrusion Detection
7 12 (3.22%) SMTP
8 11 (2.95%) SSH
9 10 (2.68%) Reverse Proxy
10 8 (2.14%) DHCP
10 8 (2.14%) FTP
11 6 (1.61%) IMAP
11 6 (1.61%) Internet
11 6 (1.61%) LAN
11 6 (1.61%) SAN
12 5 (1.34%) WAN
13 4 (1.07%) OpenVPN
14 3 (0.80%) Cisco Nexus
14 3 (0.80%) iSCSI
Database & Business Intelligence
1 67 (17.96%) MySQL
2 62 (16.62%) PostgreSQL
3 43 (11.53%) MongoDB
4 33 (8.85%) Amazon RDS
5 28 (7.51%) SQL Server
6 25 (6.70%) Hadoop
7 20 (5.36%) NoSQL
8 19 (5.09%) SQL Server 2016
9 18 (4.83%) Apache Cassandra
10 13 (3.49%) Big Data
11 9 (2.41%) HBase
12 7 (1.88%) DB2
13 5 (1.34%) MariaDB
14 4 (1.07%) Amazon Redshift
14 4 (1.07%) Azure SQL Database
14 4 (1.07%) Oracle Database
15 3 (0.80%) Data Warehouse
15 3 (0.80%) Relational Database
15 3 (0.80%) SQL Server 2012
16 2 (0.54%) Redis
Development Applications
1 213 (57.10%) Jenkins
2 137 (36.73%) Git (software)
3 65 (17.43%) JIRA
4 60 (16.09%) Maven
5 33 (8.85%) Vagrant
6 28 (7.51%) Atlassian Bamboo
7 27 (7.24%) Sonatype Nexus
8 26 (6.97%) Bitbucket
9 25 (6.70%) JUnit
10 23 (6.17%) Artifactory
10 23 (6.17%) Gerrit
11 21 (5.63%) GitLab
12 19 (5.09%) Gradle
13 17 (4.56%) Mercurial
14 15 (4.02%) Travis CI
15 12 (3.22%) Ant
16 11 (2.95%) Subversion
16 11 (2.95%) TeamCity
17 10 (2.68%) EasyMock
17 10 (2.68%) Selenium
General
1 11 (2.95%) Finance
2 10 (2.68%) Telecoms
3 9 (2.41%) Banking
4 5 (1.34%) Games
4 5 (1.34%) Legal
5 4 (1.07%) Investment Banking
6 2 (0.54%) Law
6 2 (0.54%) Retail
Job Titles
1 200 (53.62%) DevOps Engineer
2 54 (14.48%) AWS DevOps
3 47 (12.60%) Linux Engineer
4 43 (11.53%) AWS Engineer
5 42 (11.26%) Linux/Unix DevOps
6 38 (10.19%) AWS DevOps Engineer
7 34 (9.12%) Administrator
8 33 (8.85%) Linux DevOps Engineer
9 31 (8.31%) Developer
9 31 (8.31%) Senior DevOps
9 31 (8.31%) Senior DevOps Engineer
10 25 (6.70%) Kubernetes Engineer
11 24 (6.43%) Consultant
12 22 (5.90%) Systems Administrator
13 20 (5.36%) DevOps Consultant
14 19 (5.09%) Network Engineer
15 16 (4.29%) AWS Consultant
16 15 (4.02%) Java Developer
17 14 (3.75%) Linux Administrator
17 14 (3.75%) Linux Systems Administrator
Libraries, Frameworks & Software Standards
1 51 (13.67%) Elastic Stack
2 40 (10.72%) Kafka
3 39 (10.46%) Web Services
4 32 (8.58%) LAMP
5 26 (6.97%) ActiveMQ
6 20 (5.36%) LAPP Stack
6 20 (5.36%) Spring
7 18 (4.83%) REST
8 17 (4.56%) LEMP Stack
9 16 (4.29%) LDAP
10 14 (3.75%) RabbitMQ
11 12 (3.22%) Node.js
12 11 (2.95%) XML
13 10 (2.68%) EJB
13 10 (2.68%) JSF
14 8 (2.14%) Apache Camel
14 8 (2.14%) SOAP
15 7 (1.88%) Apache POI
15 7 (1.88%) OSGi
15 7 (1.88%) YAML
Miscellaneous
1 29 (7.77%) Linux Command Line
1 29 (7.77%) Public Cloud
2 28 (7.51%) Device Driver
3 19 (5.09%) Analytical Skills
4 18 (4.83%) Clustering
4 18 (4.83%) Replication
5 10 (2.68%) Wiki
6 9 (2.41%) Management Information System
7 8 (2.14%) Algorithms
7 8 (2.14%) Greenfield Project
7 8 (2.14%) Video on Demand
8 7 (1.88%) Data Centre
9 5 (1.34%) Self-Motivation
10 4 (1.07%) Fintech
10 4 (1.07%) Freedom of Information
10 4 (1.07%) Freedom of Information Act
10 4 (1.07%) Private Cloud
11 3 (0.80%) Computer Science
11 3 (0.80%) Derivative
11 3 (0.80%) Digital Media
Operating Systems
1 373 (100.00%) Linux
2 185 (49.60%) Red Hat Enterprise Linux
3 127 (34.05%) Ubuntu
4 86 (23.06%) Windows
5 64 (17.16%) Windows Server
6 48 (12.87%) Unix
7 21 (5.63%) Windows Server 2008
8 19 (5.09%) DC/OS
9 18 (4.83%) CoreOS
9 18 (4.83%) Debian
9 18 (4.83%) Windows 10
10 17 (4.56%) Windows Server 2012
11 10 (2.68%) Windows Server 2003
12 8 (2.14%) VMS
13 7 (1.88%) Solaris
14 6 (1.61%) Android
15 5 (1.34%) Fedora
15 5 (1.34%) Mac OS X
15 5 (1.34%) SUSE
16 4 (1.07%) FreeBSD
Processes & Methodologies
1 263 (70.51%) DevOps
2 167 (44.77%) Agile Software Development
3 130 (34.85%) Continuous Integration
4 81 (21.72%) Scrum
5 61 (16.35%) Configuration Management
6 45 (12.06%) Immutable Infrastructure
7 35 (9.38%) Problem-Solving
7 35 (9.38%) Test Automation
8 33 (8.85%) Continuous Delivery
8 33 (8.85%) Open Source
9 32 (8.58%) Load Balancing
10 27 (7.24%) Kanban
11 26 (6.97%) High Availability
12 25 (6.70%) Mentoring
13 20 (5.36%) Microservices
14 19 (5.09%) SDLC
15 18 (4.83%) OO
16 14 (3.75%) Migration
16 14 (3.75%) Server Monitoring
17 13 (3.49%) Security Hardening
Programming Languages
1 161 (43.16%) Python
2 140 (37.53%) Bash Shell
3 106 (28.42%) Java
4 59 (15.82%) Groovy
5 42 (11.26%) SQL
6 40 (10.72%) Go
6 40 (10.72%) Shell Script
7 37 (9.92%) Ruby
8 34 (9.12%) Perl
9 30 (8.04%) PowerShell
10 12 (3.22%) C++
10 12 (3.22%) Scala
11 11 (2.95%) JavaScript
12 8 (2.14%) PL/SQL
13 6 (1.61%) PHP
14 4 (1.07%) C
15 3 (0.80%) Clojure
15 3 (0.80%) ClojureScript
15 3 (0.80%) T-SQL
15 3 (0.80%) VBA
Qualifications
1 139 (37.27%) Security Cleared
2 96 (25.74%) SC Cleared
3 31 (8.31%) DV Cleared
4 3 (0.80%) AWS Certification
4 3 (0.80%) Degree
4 3 (0.80%) Microsoft Certification
5 2 (0.54%) CTC Cleared
5 2 (0.54%) MCSA
5 2 (0.54%) PMI Certification
5 2 (0.54%) PMP
5 2 (0.54%) RHCE
5 2 (0.54%) VCAP
5 2 (0.54%) VCDX
6 1 (0.27%) Cisco Certification
6 1 (0.27%) Computer Science Degree
6 1 (0.27%) CREST Certified
6 1 (0.27%) MCP
6 1 (0.27%) RHCSA
6 1 (0.27%) VMware Certified Professional (VCP)
Quality Assurance & Compliance
1 14 (3.75%) QA
2 9 (2.41%) GCP
3 2 (0.54%) ISO/IEC 27001
3 2 (0.54%) MiFID
3 2 (0.54%) PMO
System Software
1 197 (52.82%) Docker
2 51 (13.67%) VMware Infrastructure
3 36 (9.65%) VMware ESXi
4 31 (8.31%) Virtual Machines
5 30 (8.04%) Hyper-V
6 27 (7.24%) Active Directory
7 22 (5.90%) VirtualBox
8 15 (4.02%) Xen
9 13 (3.49%) Apache ZooKeeper
10 11 (2.95%) Squid
11 10 (2.68%) KVM
12 5 (1.34%) HDFS
12 5 (1.34%) vCloud
12 5 (1.34%) XenServer
13 4 (1.07%) Ceph
13 4 (1.07%) iptables
13 4 (1.07%) Postfix
13 4 (1.07%) Samba
14 3 (0.80%) NFS
15 2 (0.54%) vSphere
Systems Management
1 162 (43.43%) Ansible
2 141 (37.80%) Kubernetes
3 136 (36.46%) Puppet
4 122 (32.71%) Terraform
5 53 (14.21%) Nagios
6 45 (12.06%) Opscode Chef
7 40 (10.72%) Packer
8 39 (10.46%) logstash
9 37 (9.92%) Prometheus
10 34 (9.12%) ZABBIX
11 32 (8.58%) Docker Swarm
11 32 (8.58%) Grafana
12 28 (7.51%) Icinga
13 22 (5.90%) Galera Cluster
13 22 (5.90%) Kibana
14 19 (5.09%) Consul
15 18 (4.83%) vCenter Server
16 13 (3.49%) HAProxy
17 10 (2.68%) Salt
18 8 (2.14%) Sysdig
Vendors
1 134 (35.92%) Red Hat
2 95 (25.47%) VMware
3 65 (17.43%) Splunk
4 40 (10.72%) Google
5 34 (9.12%) Cisco
6 29 (7.77%) Oracle
7 24 (6.43%) Microsoft
8 21 (5.63%) Atlassian
9 19 (5.09%) New Relic
10 18 (4.83%) Hortonworks
10 18 (4.83%) NetApp
11 16 (4.29%) SaltStack
12 14 (3.75%) ServiceNow
13 12 (3.22%) Cloudera
14 10 (2.68%) SolarWinds
15 9 (2.41%) IBM
16 8 (2.14%) AppDynamics
17 7 (1.88%) Capita
17 7 (1.88%) HP
17 7 (1.88%) Juniper