Period
to 19 February 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 19 February 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
19 Feb 2018
Same period 2017 Same period 2016
Rank 307 266 299
Rank change year-on-year -41 +33 +31
Contract jobs citing CentOS 363 385 339
As % of all contract IT jobs advertised in London 0.78% 0.95% 0.76%
As % of the Operating Systems category 3.79% 4.61% 3.70%
Number of daily rates quoted 266 279 236
London median daily rate £500 £475 £456
Median daily rate % change year-on-year +5.26% +4.17% +1.33%
10th Percentile £313 £313 £345
90th Percentile £638 £594 £581
England median daily rate £475 £465 £450
% change year-on-year +2.15% +3.33% +5.88%
Number of hourly rates quoted 5 1 3
London median hourly rate £29.00 £16.00 £50.00
Median hourly rate % change year-on-year +81.25% -68.00% -
10th Percentile £26.95 £15.50 £47.50
90th Percentile £69.45 £16.50 £52.50
England median hourly rate £27.50 £16.00 £50.00
% change year-on-year +71.88% -68.00% +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 9,590 8,360 9,157
As % of all contract IT jobs advertised in London 20.59% 20.55% 20.60%
Number of daily rates quoted 6,860 5,802 6,265
London median daily rate £475 £450 £438
Median daily rate % change year-on-year +5.56% +2.86% +5.42%
10th Percentile £200 £240 £213
90th Percentile £640 £620 £600
England median daily rate £425 £413 £400
% change year-on-year +3.03% +3.13% +6.67%
Number of hourly rates quoted 292 193 296
London median hourly rate £18.70 £20.00 £17.00
Median hourly rate % change year-on-year -6.50% +17.65% -
10th Percentile £12.00 £12.50 £11.21
90th Percentile £47.83 £50.00 £45.79
England median hourly rate £17.38 £16.50 £16.50
% change year-on-year +5.30% - +3.13%

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 19 February 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
Contractor Hourly Rate Histogram in London

The hourly rate distribution of IT jobs citing CentOS in London over the 6 months to 19 February 2018.

Contractor hourly rate histogram 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 19 February 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 -22 63 £520 +10.64% 1
Central London -39 37 £525 +18.98% 24
West London -22 25 £515 -1.90% 16
East London - 10 £675 - 2
North London - 1 £329 -
CentOS
England

For the 6 months to 19 February 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.

1 363 (100.00%) Linux
2 245 (67.49%) DevOps
3 207 (57.02%) Red Hat Enterprise Linux
4 162 (44.63%) Amazon AWS
5 160 (44.08%) Bash Shell
6 158 (43.53%) Jenkins
7 154 (42.42%) Docker
8 146 (40.22%) Red Hat
9 140 (38.57%) Python
10 135 (37.19%) Agile Software Development
11 130 (35.81%) Ansible
12 124 (34.16%) Puppet
13 111 (30.58%) Git (software)
14 106 (29.20%) Security Cleared
15 100 (27.55%) Kubernetes
15 100 (27.55%) Ubuntu
16 99 (27.27%) VMware
16 99 (27.27%) Java
17 92 (25.34%) Continuous Integration
18 83 (22.87%) Terraform
19 79 (21.76%) Windows
20 75 (20.66%) SC Cleared
21 71 (19.56%) Unix
22 68 (18.73%) MySQL
22 68 (18.73%) Tomcat
23 67 (18.46%) Scrum
24 66 (18.18%) PostgreSQL
25 63 (17.36%) Elasticsearch
26 62 (17.08%) Maven
26 62 (17.08%) JIRA

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 68 (18.73%) Tomcat
2 63 (17.36%) Elasticsearch
3 44 (12.12%) Apache
4 42 (11.57%) Confluence
5 27 (7.44%) nginx
6 15 (4.13%) JBoss
7 14 (3.86%) Apache Spark
7 14 (3.86%) OpenStack
8 9 (2.48%) Jetty
9 6 (1.65%) Apache Solr
10 5 (1.38%) Apache Pig
10 5 (1.38%) Mule ESB
10 5 (1.38%) WildFly
11 4 (1.10%) Adobe Experience Manager
11 4 (1.10%) Drupal
11 4 (1.10%) WordPress
12 2 (0.55%) IIS
12 2 (0.55%) MS Exchange
12 2 (0.55%) Oracle SOA Suite
13 1 (0.28%) SharePoint
Applications
1 1 (0.28%) HipChat
Cloud Services
1 162 (44.63%) Amazon AWS
2 36 (9.92%) Microsoft Azure
3 33 (9.09%) Amazon EC2
4 26 (7.16%) Virtual Private Cloud
5 22 (6.06%) Amazon S3
6 13 (3.58%) Amazon ELB
7 11 (3.03%) Amazon CloudWatch
8 9 (2.48%) AWS CloudFormation
9 8 (2.20%) AWS Lambda
9 8 (2.20%) Serverless
10 7 (1.93%) Google Cloud Platform
11 6 (1.65%) Amazon EMR
11 6 (1.65%) Azure Active Directory
11 6 (1.65%) Datadog
11 6 (1.65%) GitHub
12 5 (1.38%) AWS CloudTrail
12 5 (1.38%) Office 365
12 5 (1.38%) Route 53
13 4 (1.10%) IaaS
14 3 (0.83%) Amazon SQS
Communications & Networking
1 54 (14.88%) Firewall
2 39 (10.74%) VPN
3 37 (10.19%) DNS
4 27 (7.44%) TCP/IP
5 26 (7.16%) SAN
6 21 (5.79%) LAN
7 20 (5.51%) OpenLDAP
7 20 (5.51%) WAN
8 18 (4.96%) DHCP
8 18 (4.96%) HTTP
9 12 (3.31%) VoIP
10 11 (3.03%) SMTP
10 11 (3.03%) SSH
11 8 (2.20%) Reverse Proxy
12 7 (1.93%) OpenVPN
13 6 (1.65%) Internet
13 6 (1.65%) Kerberos
14 5 (1.38%) FTP
14 5 (1.38%) IMAP
14 5 (1.38%) iSCSI
Database & Business Intelligence
1 68 (18.73%) MySQL
2 66 (18.18%) PostgreSQL
3 43 (11.85%) MongoDB
4 31 (8.54%) NoSQL
5 27 (7.44%) Amazon RDS
5 27 (7.44%) Hadoop
6 22 (6.06%) Apache Cassandra
7 18 (4.96%) Big Data
8 11 (3.03%) HBase
9 9 (2.48%) DB2
9 9 (2.48%) Redis
9 9 (2.48%) SQL Server
10 8 (2.20%) Relational Database
11 7 (1.93%) Data Warehouse
12 6 (1.65%) Apache Hive
12 6 (1.65%) Riak
13 5 (1.38%) Data Mining
13 5 (1.38%) Impala
13 5 (1.38%) MariaDB
13 5 (1.38%) MarkLogic
Development Applications
1 158 (43.53%) Jenkins
2 111 (30.58%) Git (software)
3 62 (17.08%) JIRA
3 62 (17.08%) Maven
4 25 (6.89%) Bitbucket
5 22 (6.06%) Sonatype Nexus
6 19 (5.23%) Gerrit
7 18 (4.96%) JUnit
8 13 (3.58%) Gradle
9 12 (3.31%) Atlassian Bamboo
10 9 (2.48%) Mercurial
11 8 (2.20%) GitLab
12 7 (1.93%) Ant
12 7 (1.93%) Artifactory
12 7 (1.93%) EasyMock
12 7 (1.93%) Liquibase
12 7 (1.93%) SonarQube
12 7 (1.93%) TeamCity
12 7 (1.93%) Vagrant
13 5 (1.38%) git-flow
General
1 16 (4.41%) Finance
2 5 (1.38%) Games
2 5 (1.38%) Retail
3 3 (0.83%) Banking
3 3 (0.83%) Telecoms
4 2 (0.55%) Advertising
4 2 (0.55%) Legal
5 1 (0.28%) Billing
5 1 (0.28%) International Banking
5 1 (0.28%) Law
5 1 (0.28%) Marketing
Job Titles
1 181 (49.86%) DevOps Engineer
2 66 (18.18%) AWS DevOps
3 54 (14.88%) Linux Engineer
4 53 (14.60%) AWS Engineer
5 52 (14.33%) Administrator
6 51 (14.05%) Linux/Unix DevOps
7 46 (12.67%) AWS DevOps Engineer
8 43 (11.85%) Linux DevOps Engineer
9 32 (8.82%) Systems Administrator
10 31 (8.54%) Linux Administrator
11 28 (7.71%) Senior DevOps
11 28 (7.71%) Senior DevOps Engineer
12 27 (7.44%) Developer
13 26 (7.16%) Kubernetes Engineer
13 26 (7.16%) Linux Systems Administrator
13 26 (7.16%) Windows Engineer
14 24 (6.61%) Consultant
14 24 (6.61%) DevOps Consultant
15 21 (5.79%) AWS Consultant
16 16 (4.41%) Infrastructure Engineer
Libraries, Frameworks & Software Standards
1 48 (13.22%) Web Services
2 35 (9.64%) ActiveMQ
2 35 (9.64%) Elastic Stack
3 33 (9.09%) LAMP
4 24 (6.61%) LDAP
5 21 (5.79%) REST
6 19 (5.23%) LAPP Stack
7 18 (4.96%) Kafka
8 16 (4.41%) Spring
9 15 (4.13%) LEMP Stack
10 13 (3.58%) MCollective
11 12 (3.31%) Node.js
11 12 (3.31%) SOAP
12 11 (3.03%) RabbitMQ
13 9 (2.48%) RESTful
14 8 (2.20%) Natural Language Processing
15 7 (1.93%) Apache Camel
15 7 (1.93%) EJB
15 7 (1.93%) JSF
15 7 (1.93%) XML
Miscellaneous
1 32 (8.82%) Replication
2 31 (8.54%) Public Cloud
3 25 (6.89%) Clustering
3 25 (6.89%) Linux Command Line
4 23 (6.34%) Device Driver
5 17 (4.68%) Data Centre
6 16 (4.41%) Greenfield Project
7 11 (3.03%) Analytical Skills
8 10 (2.75%) Video on Demand
9 7 (1.93%) Wiki
10 6 (1.65%) Computer Science
11 5 (1.38%) Algorithms
12 4 (1.10%) Fintech
13 3 (0.83%) Grid Computing
13 3 (0.83%) Management Information System
14 2 (0.55%) Infotainment
14 2 (0.55%) NHS
14 2 (0.55%) Renewable Energy
14 2 (0.55%) Spread Betting
15 1 (0.28%) Virtual Team
Operating Systems
1 363 (100.00%) Linux
2 207 (57.02%) Red Hat Enterprise Linux
3 100 (27.55%) Ubuntu
4 79 (21.76%) Windows
5 71 (19.56%) Unix
6 59 (16.25%) Windows Server
7 45 (12.40%) Windows Server 2012
8 34 (9.37%) Windows Server 2003
9 9 (2.48%) Debian
9 9 (2.48%) Windows Server 2008
10 6 (1.65%) CoreOS
10 6 (1.65%) Mac OS X
10 6 (1.65%) Scientific Linux
11 5 (1.38%) SUSE
12 4 (1.10%) DC/OS
12 4 (1.10%) Fedora
12 4 (1.10%) FreeBSD
13 3 (0.83%) Solaris
14 2 (0.55%) Mac OS
14 2 (0.55%) Windows 7
Processes & Methodologies
1 245 (67.49%) DevOps
2 135 (37.19%) Agile Software Development
3 92 (25.34%) Continuous Integration
4 67 (18.46%) Scrum
5 51 (14.05%) Open Source
6 43 (11.85%) Configuration Management
7 39 (10.74%) Load Balancing
8 31 (8.54%) Immutable Infrastructure
9 29 (7.99%) Migration
10 26 (7.16%) Mentoring
11 24 (6.61%) Continuous Delivery
12 22 (6.06%) Kanban
13 20 (5.51%) Dependency Injection
14 18 (4.96%) High Availability
14 18 (4.96%) Root Cause Analysis
15 16 (4.41%) Microservices
15 16 (4.41%) Patch Management
16 15 (4.13%) Analytics
17 13 (3.58%) Network Monitoring
18 12 (3.31%) Test Automation
Programming Languages
1 160 (44.08%) Bash Shell
2 140 (38.57%) Python
3 99 (27.27%) Java
4 54 (14.88%) Groovy
5 50 (13.77%) PowerShell
6 39 (10.74%) Ruby
7 35 (9.64%) Perl
8 33 (9.09%) Shell Script
9 30 (8.26%) Go
10 20 (5.51%) SQL
11 10 (2.75%) JavaScript
12 7 (1.93%) C
12 7 (1.93%) C++
12 7 (1.93%) PHP
13 5 (1.38%) C#
13 5 (1.38%) R
13 5 (1.38%) Scala
14 3 (0.83%) Fortran
15 2 (0.55%) Erlang
16 1 (0.28%) T-SQL
Qualifications
1 106 (29.20%) Security Cleared
2 75 (20.66%) SC Cleared
3 12 (3.31%) Degree
4 8 (2.20%) DV Cleared
5 4 (1.10%) CCNP
5 4 (1.10%) CCSE
5 4 (1.10%) CISA
5 4 (1.10%) Cisco Certification
5 4 (1.10%) CISMP
5 4 (1.10%) CISSP
6 3 (0.83%) Computer Science Degree
6 3 (0.83%) RHCE
7 2 (0.55%) CTC Cleared
7 2 (0.55%) VCP5
7 2 (0.55%) VMware Certified Professional (VCP)
8 1 (0.28%) AWS Certification
8 1 (0.28%) CREST Certified
Quality Assurance & Compliance
1 11 (3.03%) QA
2 5 (1.38%) Disclosure Scotland
3 4 (1.10%) GDPR
4 2 (0.55%) GCP
5 1 (0.28%) PMO
System Software
1 154 (42.42%) Docker
2 48 (13.22%) VMware ESXi
3 45 (12.40%) VMware Infrastructure
4 43 (11.85%) Hyper-V
5 32 (8.82%) Active Directory
6 19 (5.23%) Virtual Machines
7 15 (4.13%) Samba
8 14 (3.86%) Squid
9 10 (2.75%) vCloud
10 9 (2.48%) HDFS
11 8 (2.20%) NFS
12 7 (1.93%) Postfix
13 5 (1.38%) iptables
13 5 (1.38%) KVM
13 5 (1.38%) Xen
13 5 (1.38%) XenServer
14 4 (1.10%) Ceph
15 2 (0.55%) GlusterFS
15 2 (0.55%) VirtualBox
15 2 (0.55%) vSphere
Systems Management
1 130 (35.81%) Ansible
2 124 (34.16%) Puppet
3 100 (27.55%) Kubernetes
4 83 (22.87%) Terraform
5 52 (14.33%) logstash
6 50 (13.77%) Opscode Chef
7 49 (13.50%) Nagios
8 35 (9.64%) ZABBIX
9 34 (9.37%) Prometheus
10 28 (7.71%) Grafana
11 26 (7.16%) WMI
12 24 (6.61%) Galera Cluster
12 24 (6.61%) Icinga
13 21 (5.79%) Kibana
14 14 (3.86%) Packer
15 13 (3.58%) HAProxy
16 12 (3.31%) Consul
17 11 (3.03%) Hadoop YARN
17 11 (3.03%) Sysdig
18 10 (2.75%) Salt
Vendors
1 146 (40.22%) Red Hat
2 99 (27.27%) VMware
3 57 (15.70%) Splunk
4 42 (11.57%) Cisco
5 32 (8.82%) SolarWinds
6 25 (6.89%) Atlassian
7 24 (6.61%) Juniper
8 20 (5.51%) Oracle
9 13 (3.58%) ServiceNow
10 12 (3.31%) Fortinet
10 12 (3.31%) IBM
10 12 (3.31%) Mitel
11 11 (3.03%) Microsoft
12 9 (2.48%) Extreme Networks
12 9 (2.48%) SaltStack
13 8 (2.20%) Capita
13 8 (2.20%) Google
14 7 (1.93%) EMC
14 7 (1.93%) NetApp
14 7 (1.93%) Sonatype