Period
to 3 April 2020

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 3 April 2020 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
3 Apr 2020
Same period 2019 Same period 2018
Rank 378 460 332
Rank change year-on-year +82 -128 -56
Contract jobs citing CentOS 94 160 347
As % of all contract jobs advertised in London 0.37% 0.38% 0.74%
As % of the Operating Systems category 2.14% 2.00% 3.59%
Number of daily rates quoted 68 114 263
Median daily rate £481 £520 £500
Median daily rate % change year-on-year -7.45% +4.00% +5.26%
10th Percentile £396 £413 £313
90th Percentile £713 £600 £638
England median daily rate £491 £500 £488
% change year-on-year -1.75% +2.56% +2.63%
Number of hourly rates quoted 2 0 2
Median hourly rate £35.00 - £71.25
England median hourly rate £35.00 £16.86 £51.00
% change year-on-year +107.59% -66.94% +204.48%

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 4,399 7,988 9,665
As % of all contract IT jobs advertised in London 17.48% 18.78% 20.74%
Number of daily rates quoted 3,008 5,544 6,895
Median daily rate £450 £480 £475
Median daily rate % change year-on-year -6.25% +1.05% +5.56%
10th Percentile £163 £181 £211
90th Percentile £650 £650 £650
England median daily rate £425 £438 £438
% change year-on-year -2.86% - +3.55%
Number of hourly rates quoted 155 223 304
Median hourly rate £24.00 £21.00 £18.70
Median hourly rate % change year-on-year +14.29% +12.30% -13.02%
10th Percentile £15.20 £13.60 £12.32
90th Percentile £64.50 £48.57 £47.83
Median hourly rate £17.50 £17.50 £17.43
% change year-on-year - +0.40% +4.06%

CentOS
Job Vacancy Trend in London

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

Job vacancy trend for CentOS in London

CentOS
Contractor Daily Rate Trend in London

3-month moving average daily rate quoted in jobs citing CentOS in London.

Daily rate trend for CentOS in London

CentOS
Daily Rate Histogram in London

Daily rate distribution for jobs citing CentOS in London over the 6 months to 3 April 2020.

Daily rate histogram for CentOS in London

CentOS
Contractor Hourly Rate Trend in London

3-month moving average hourly rates quoted in jobs citing CentOS in London.

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 3 April 2020. 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 +6 16 £525 +5.00% 4
Central London +92 11 £525 +13.51% 11
East London - 1 - - 3
West London - 1 - - 3
CentOS
England

For the 6 months to 3 April 2020, 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 94 (100.00%) Linux
2 54 (57.45%) Red Hat Enterprise Linux
3 45 (47.87%) DevOps
4 44 (46.81%) Python
5 40 (42.55%) Git (software)
5 40 (42.55%) Bash Shell
6 38 (40.43%) Security Cleared
7 36 (38.30%) Ansible
8 34 (36.17%) Jenkins
9 30 (31.91%) Agile Software Development
9 30 (31.91%) Red Hat
10 29 (30.85%) SC Cleared
11 28 (29.79%) AWS
11 28 (29.79%) Windows
12 26 (27.66%) Terraform
13 24 (25.53%) VMware
13 24 (25.53%) Azure
14 23 (24.47%) Puppet
14 23 (24.47%) Ubuntu
14 23 (24.47%) Docker
15 21 (22.34%) Kubernetes
15 21 (22.34%) JIRA
15 21 (22.34%) Firewall
16 19 (20.21%) .NET
16 19 (20.21%) MySQL
17 18 (19.15%) Java
17 18 (19.15%) Configuration Management
18 17 (18.09%) C++
18 17 (18.09%) Continuous Integration
19 16 (17.02%) GCP

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 9 (9.57%) nginx
2 8 (8.51%) Elasticsearch
3 6 (6.38%) Tomcat
4 5 (5.32%) Confluence
5 3 (3.19%) JBoss
6 2 (2.13%) OpenStack
6 2 (2.13%) Red Hat Fuse
6 2 (2.13%) WebLogic
7 1 (1.06%) Apache
7 1 (1.06%) Apache Spark
7 1 (1.06%) IIS
7 1 (1.06%) Jetty
7 1 (1.06%) Mailman
7 1 (1.06%) MQSeries
7 1 (1.06%) Oracle Self-Service HR
7 1 (1.06%) Podio
7 1 (1.06%) SharePoint
7 1 (1.06%) Skype for Business
7 1 (1.06%) WordPress
Business Applications
1 1 (1.06%) Sparx Enterprise Architect
Cloud Services
1 28 (29.79%) AWS
2 24 (25.53%) Azure
3 16 (17.02%) GCP
4 9 (9.57%) Amazon EKS
5 7 (7.45%) Amazon ECS
5 7 (7.45%) SonarCloud
6 4 (4.26%) Amazon EC2
7 3 (3.19%) Office 365
8 2 (2.13%) Amazon S3
8 2 (2.13%) AWS Lambda
8 2 (2.13%) Azure Active Directory
8 2 (2.13%) IaaS
8 2 (2.13%) OpenShift
8 2 (2.13%) PaaS
8 2 (2.13%) Serverless
8 2 (2.13%) Virtual Private Cloud
9 1 (1.06%) Amazon CloudWatch
9 1 (1.06%) AWS CloudFormation
9 1 (1.06%) AWS CloudTrail
9 1 (1.06%) SaaS
Communications & Networking
1 21 (22.34%) Firewall
2 10 (10.64%) Network Security
3 6 (6.38%) DNS
4 5 (5.32%) TCP/IP
5 4 (4.26%) SAN
6 3 (3.19%) Cisco Nexus
6 3 (3.19%) VPN
7 2 (2.13%) Cisco IOS
7 2 (2.13%) IPsec
7 2 (2.13%) SNMP
7 2 (2.13%) SSH
8 1 (1.06%) IMAP
8 1 (1.06%) Internet
8 1 (1.06%) LAN
8 1 (1.06%) OpenLDAP
8 1 (1.06%) Reverse Proxy
8 1 (1.06%) S/MIME
8 1 (1.06%) SMTP
8 1 (1.06%) VLAN
8 1 (1.06%) Wireshark
Database & Business Intelligence
1 19 (20.21%) MySQL
2 7 (7.45%) PostgreSQL
3 5 (5.32%) MongoDB
4 4 (4.26%) Big Data
4 4 (4.26%) Hadoop
4 4 (4.26%) SQL Server
5 3 (3.19%) Amazon RDS
6 2 (2.13%) Oracle Database
7 1 (1.06%) Amazon Aurora
7 1 (1.06%) Apache Accumulo
7 1 (1.06%) Cloudera CDH
7 1 (1.06%) Data Warehouse
7 1 (1.06%) HBase
7 1 (1.06%) MariaDB
7 1 (1.06%) NoSQL
7 1 (1.06%) SQL Server 2012
7 1 (1.06%) SQL Server Analysis Services
7 1 (1.06%) SQL Server Reporting Services
Development Applications
1 40 (42.55%) Git (software)
2 34 (36.17%) Jenkins
3 21 (22.34%) JIRA
4 13 (13.83%) GitLab
5 11 (11.70%) Sonatype Nexus
6 9 (9.57%) Artifactory
6 9 (9.57%) CircleCI
7 7 (7.45%) Snyk
8 6 (6.38%) Maven
8 6 (6.38%) SonarQube
8 6 (6.38%) Subversion
9 5 (5.32%) Vagrant
10 4 (4.26%) Bitbucket
10 4 (4.26%) Mercurial
11 3 (3.19%) FindBugs
11 3 (3.19%) Log4j
12 2 (2.13%) Atlassian Bamboo
12 2 (2.13%) Hudson
12 2 (2.13%) TeamCity
13 1 (1.06%) Team Foundation Server
General
1 7 (7.45%) Public Sector
2 3 (3.19%) Games
3 2 (2.13%) Banking
3 2 (2.13%) Finance
3 2 (2.13%) Law
4 1 (1.06%) Aerospace
4 1 (1.06%) Automotive
4 1 (1.06%) Marketing
4 1 (1.06%) Police
4 1 (1.06%) Retail
4 1 (1.06%) Telecoms
Job Titles
1 24 (25.53%) DevOps Engineer
2 11 (11.70%) Linux Engineer
2 11 (11.70%) Platform Engineer
3 9 (9.57%) Administrator
4 8 (8.51%) Linux/Unix DevOps
5 7 (7.45%) Automation Engineer
5 7 (7.45%) Consultant
5 7 (7.45%) Infrastructure Engineer
5 7 (7.45%) Mac Engineer
5 7 (7.45%) Network Engineer
6 6 (6.38%) Cloud Engineer
6 6 (6.38%) DevOps Automation Engineer
6 6 (6.38%) Systems Administrator
7 5 (5.32%) AWS Engineer
7 5 (5.32%) Linux Administrator
7 5 (5.32%) Linux DevOps Engineer
7 5 (5.32%) Python Engineer
7 5 (5.32%) Software Engineer
8 4 (4.26%) Architect
8 4 (4.26%) Security Engineer
Libraries, Frameworks & Software Standards
1 19 (20.21%) .NET
2 13 (13.83%) RabbitMQ
3 11 (11.70%) Kafka
3 11 (11.70%) Node.js
3 11 (11.70%) REST
4 10 (10.64%) JSON
5 9 (9.57%) XML
6 6 (6.38%) LAMP
6 6 (6.38%) Middleware
7 5 (5.32%) LDAP
8 4 (4.26%) Spring
9 3 (3.19%) ActiveMQ
9 3 (3.19%) Apache Camel
9 3 (3.19%) Elastic Stack
9 3 (3.19%) HTML
9 3 (3.19%) HTML5
10 2 (2.13%) Apache NiFi
10 2 (2.13%) CSS3
10 2 (2.13%) Lambda Expressions
10 2 (2.13%) React
Miscellaneous
1 9 (9.57%) Cloud Native
2 8 (8.51%) Data Centre
3 7 (7.45%) Linux Command Line
4 6 (6.38%) Hedge funds
5 5 (5.32%) Analytical Skills
5 5 (5.32%) Clustering
6 4 (4.26%) User Experience
7 3 (3.19%) PKI
8 2 (2.13%) Enterprise Storage
8 2 (2.13%) Mobile App
8 2 (2.13%) Public Cloud
9 1 (1.06%) Derivative
9 1 (1.06%) Hybrid Cloud
9 1 (1.06%) Management Information System
9 1 (1.06%) NHS
9 1 (1.06%) Online Games
9 1 (1.06%) Private Cloud
Operating Systems
1 94 (100.00%) Linux
2 54 (57.45%) Red Hat Enterprise Linux
3 28 (29.79%) Windows
4 23 (24.47%) Ubuntu
5 13 (13.83%) Windows Server
6 12 (12.77%) Unix
7 9 (9.57%) CoreOS
8 8 (8.51%) Debian
9 7 (7.45%) Mac OS
10 3 (3.19%) Mac OS X
10 3 (3.19%) Windows Server 2008
10 3 (3.19%) Windows Server 2012
11 2 (2.13%) Android
11 2 (2.13%) DC/OS
11 2 (2.13%) Solaris
11 2 (2.13%) Windows Server 2016
12 1 (1.06%) Fedora
12 1 (1.06%) SUSE
12 1 (1.06%) VMS
12 1 (1.06%) Windows 7
Processes & Methodologies
1 45 (47.87%) DevOps
2 30 (31.91%) Agile Software Development
3 18 (19.15%) Configuration Management
4 17 (18.09%) Continuous Integration
5 14 (14.89%) Infrastructure Automation
5 14 (14.89%) Infrastructure Engineering
5 14 (14.89%) Open Source
5 14 (14.89%) Test Automation
6 12 (12.77%) Infrastructure as Code
6 12 (12.77%) ITIL
7 11 (11.70%) Microservices
8 10 (10.64%) Build Automation
8 10 (10.64%) SIEM
9 9 (9.57%) Malware Analysis
9 9 (9.57%) Scrum
9 9 (9.57%) Service Design
9 9 (9.57%) The Twelve-Factor App
9 9 (9.57%) Vulnerability Scanning
10 8 (8.51%) Immutable Infrastructure
10 8 (8.51%) Root Cause Analysis
Programming Languages
1 44 (46.81%) Python
2 40 (42.55%) Bash Shell
3 18 (19.15%) Java
4 17 (18.09%) C++
5 13 (13.83%) Perl
6 12 (12.77%) JavaScript
7 11 (11.70%) Go
7 11 (11.70%) Groovy
8 9 (9.57%) Rust
9 7 (7.45%) R
9 7 (7.45%) Ruby
10 6 (6.38%) PowerShell
10 6 (6.38%) SQL
11 5 (5.32%) Shell Script
12 3 (3.19%) C
13 2 (2.13%) C#
13 2 (2.13%) PL/SQL
13 2 (2.13%) T-SQL
14 1 (1.06%) Clojure
14 1 (1.06%) PHP
Qualifications
1 38 (40.43%) Security Cleared
2 29 (30.85%) SC Cleared
3 10 (10.64%) CCNA
3 10 (10.64%) Cisco Certification
3 10 (10.64%) DV Cleared
3 10 (10.64%) Network+ Certification
4 9 (9.57%) CCENT
5 4 (4.26%) Microsoft Certification
6 3 (3.19%) Degree
7 2 (2.13%) MCP
7 2 (2.13%) VMware Certified Professional (VCP)
8 1 (1.06%) CISSP
8 1 (1.06%) CompTIA Security+
8 1 (1.06%) GIAC
8 1 (1.06%) Linux+ Certification
8 1 (1.06%) MCSE
8 1 (1.06%) SANS
8 1 (1.06%) SSCP
Quality Assurance & Compliance
1 9 (9.57%) NIST
2 2 (2.13%) ISO/IEC 27001
3 1 (1.06%) COBIT
3 1 (1.06%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
3 1 (1.06%) PCI DSS
3 1 (1.06%) PMO
3 1 (1.06%) Sarbanes-Oxley
System Software
1 23 (24.47%) Docker
2 11 (11.70%) Active Directory
2 11 (11.70%) VMware Infrastructure
3 9 (9.57%) VMware NSX
4 7 (7.45%) VMware ESXi
5 4 (4.26%) Hyper-V
5 4 (4.26%) iptables
5 4 (4.26%) KVM
6 3 (3.19%) Virtual Machines
6 3 (3.19%) VirtualBox
7 1 (1.06%) Apache ZooKeeper
7 1 (1.06%) LXC
7 1 (1.06%) NFS
7 1 (1.06%) OCFS2
7 1 (1.06%) Oracle RAC
7 1 (1.06%) Samba
7 1 (1.06%) Snort
7 1 (1.06%) Virtual Servers
7 1 (1.06%) vSphere
7 1 (1.06%) Xen
Systems Management
1 36 (38.30%) Ansible
2 26 (27.66%) Terraform
3 23 (24.47%) Puppet
4 21 (22.34%) Kubernetes
5 14 (14.89%) Opscode Chef
6 10 (10.64%) vCenter Server
7 9 (9.57%) Packer
8 8 (8.51%) Symantec Endpoint Protection
9 7 (7.45%) Jamf Pro
9 7 (7.45%) Norton AntiVirus
10 6 (6.38%) CFEngine
10 6 (6.38%) logstash
11 5 (5.32%) Consul
11 5 (5.32%) Docker Swarm
12 4 (4.26%) yum
12 4 (4.26%) ZABBIX
13 3 (3.19%) Nagios
13 3 (3.19%) PowerCLI
14 2 (2.13%) Microsoft Clustering
14 2 (2.13%) Prometheus
Vendors
1 30 (31.91%) Red Hat
2 24 (25.53%) VMware
3 11 (11.70%) Microsoft
4 10 (10.64%) Palo Alto
5 9 (9.57%) Confluent
5 9 (9.57%) Remedy
5 9 (9.57%) Symantec
5 9 (9.57%) Veracode
6 8 (8.51%) Splunk
7 7 (7.45%) Apple
7 7 (7.45%) Axway
7 7 (7.45%) SaltStack
8 6 (6.38%) Oracle
9 5 (5.32%) Cisco
10 4 (4.26%) Cloudera
10 4 (4.26%) SolarWinds
11 3 (3.19%) F5
11 3 (3.19%) Juniper
12 2 (2.13%) HP
12 2 (2.13%) Sophos