Period
to 20 January 2018

The following table provides summary statistics for contract job vacancies advertised in the City of 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 20 January 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
Central London > City of London
6 months to
20 Jan 2018
Same period 2017 Same period 2016
Rank 222 187 213
Rank change year-on-year -35 +26 +48
Contract jobs citing CentOS 22 44 24
As % of all contract IT jobs advertised in the City of London 0.31% 0.71% 0.34%
As % of the Operating Systems category 1.54% 3.28% 1.50%
Number of daily rates quoted 21 36 22
City of London median daily rate £525 £450 £438
Median daily rate % change year-on-year +16.67% +2.68% +9.56%
10th Percentile £463 £353 £342
90th Percentile £638 £600 £499
Central London median daily rate £521 £450 £445
% change year-on-year +15.83% +1.24% +4.59%
Number of hourly rates quoted 0 0 0
City of London median hourly rate - - -
Central London median hourly rate - - -

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 the City of London with a requirement for operating system skills.

All Operating Systems
City of London
Contract vacancies with a requirement for operating system skills 1,427 1,343 1,601
As % of all contract IT jobs advertised in the City of London 20.25% 21.60% 22.46%
Number of daily rates quoted 1,123 1,062 1,248
City of London median daily rate £490 £450 £450
Median daily rate % change year-on-year +8.89% - +7.14%
10th Percentile £251 £306 £225
90th Percentile £675 £638 £625
Central London median daily rate £475 £450 £438
% change year-on-year +5.56% +2.86% +6.06%
Number of hourly rates quoted 51 25 47
City of London median hourly rate £15.00 £21.75 £20.00
Median hourly rate % change year-on-year -31.03% +8.75% +25.00%
10th Percentile £11.25 £13.10 £12.16
90th Percentile £25.75 £79.00 £38.75
Central London median hourly rate £15.50 £18.85 £19.00
% change year-on-year -17.77% -0.79% +22.58%

CentOS
Job Vacancy Trend in the City of London

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

Job vacancy trend for CentOS in the City of London

CentOS
Contractor Daily Rate Trend in the City of London

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

Contractor daily rate trend for CentOS in the City of London

CentOS
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing CentOS in the City of London over the 6 months to 20 January 2018.

Contractor daily rate histogram for CentOS in the City of London

For the 6 months to 20 January 2018, IT contractor jobs citing CentOS also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads across the City of London region with a requirement for CentOS.

1 22 (100.00%) Linux
2 17 (77.27%) DevOps
3 14 (63.64%) Amazon AWS
4 13 (59.09%) Terraform
5 10 (45.45%) Docker
5 10 (45.45%) Kubernetes
5 10 (45.45%) Red Hat
6 9 (40.91%) Ansible
7 8 (36.36%) Bash Shell
7 8 (36.36%) Python
8 7 (31.82%) Ubuntu
9 6 (27.27%) Big Data
9 6 (27.27%) Puppet
10 5 (22.73%) Big Data Analytics
10 5 (22.73%) Data Analytics
10 5 (22.73%) Analytics
10 5 (22.73%) Perl
10 5 (22.73%) Nagios
10 5 (22.73%) Configuration Management
10 5 (22.73%) Cloud Operations
11 4 (18.18%) Ruby
11 4 (18.18%) Google
11 4 (18.18%) Finance
11 4 (18.18%) Jenkins
12 3 (13.64%) Opscode Chef
12 3 (13.64%) IaaS
12 3 (13.64%) Google Compute Engine
12 3 (13.64%) Google Cloud Platform
12 3 (13.64%) Continuous Integration
12 3 (13.64%) Red Hat Enterprise Linux

CentOS
Co-occurring IT Skills in the City of 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 2 (9.09%) nginx
2 1 (4.55%) Apache Solr
2 1 (4.55%) Apache Spark
2 1 (4.55%) Elasticsearch
2 1 (4.55%) Jetty
2 1 (4.55%) Tomcat
Cloud Services
1 14 (63.64%) Amazon AWS
2 3 (13.64%) Google Cloud Platform
2 3 (13.64%) Google Compute Engine
2 3 (13.64%) IaaS
3 2 (9.09%) AWS CloudFormation
4 1 (4.55%) Amazon SQS
4 1 (4.55%) Cloud Computing
Communications & Networking
1 2 (9.09%) DNS
1 2 (9.09%) TCP/IP
2 1 (4.55%) Cisco ASA
2 1 (4.55%) Cisco Nexus
2 1 (4.55%) DHCP
2 1 (4.55%) Ethernet
2 1 (4.55%) NAS
2 1 (4.55%) SAN
2 1 (4.55%) SMTP
Database & Business Intelligence
1 6 (27.27%) Big Data
2 3 (13.64%) MySQL
3 1 (4.55%) Apache Cassandra
3 1 (4.55%) Apache Hive
3 1 (4.55%) Data Warehouse
3 1 (4.55%) Hadoop
3 1 (4.55%) InfluxDB
3 1 (4.55%) MongoDB
3 1 (4.55%) PostgreSQL
3 1 (4.55%) SQL Server
3 1 (4.55%) SQL Server 2008
3 1 (4.55%) SQL Server 2012
3 1 (4.55%) SQL Server 2014
3 1 (4.55%) SQL Server Reporting Services
Development Applications
1 4 (18.18%) Jenkins
2 2 (9.09%) TeamCity
3 1 (4.55%) Git (software)
3 1 (4.55%) JMeter
3 1 (4.55%) RSpec
3 1 (4.55%) Sonatype Nexus
General
1 4 (18.18%) Finance
2 1 (4.55%) Telecoms
Job Titles
1 13 (59.09%) DevOps Engineer
2 4 (18.18%) AWS Engineer
3 3 (13.64%) AWS DevOps
3 3 (13.64%) AWS DevOps Engineer
3 3 (13.64%) Linux Engineer
4 2 (9.09%) Administrator
4 2 (9.09%) C++ Developer
4 2 (9.09%) Cloud Engineer
4 2 (9.09%) CloudOps Engineer
4 2 (9.09%) Developer
4 2 (9.09%) Linux DevOps Engineer
4 2 (9.09%) Linux/Unix DevOps
4 2 (9.09%) Systems Administrator
4 2 (9.09%) Systems Engineer
5 1 (4.55%) Applications Engineer
5 1 (4.55%) DevOps Administrator
5 1 (4.55%) Linux Systems Engineer
5 1 (4.55%) Senior DevOps Engineer
5 1 (4.55%) Unix Administrator
5 1 (4.55%) Unix Systems Administrator
Libraries, Frameworks & Software Standards
1 2 (9.09%) Boost C++ Libraries
1 2 (9.09%) Web Services
2 1 (4.55%) CSS
2 1 (4.55%) Elastic Stack
2 1 (4.55%) HTML
2 1 (4.55%) HTML5
2 1 (4.55%) LEMP Stack
2 1 (4.55%) Node.js
2 1 (4.55%) Regular Expression
2 1 (4.55%) REST
2 1 (4.55%) Servlets
2 1 (4.55%) SOAP
Miscellaneous
1 3 (13.64%) Computer Science
2 2 (9.09%) Analytical Skills
2 2 (9.09%) Greenfield Project
3 1 (4.55%) Enterprise Storage
3 1 (4.55%) Management Information System
3 1 (4.55%) Security Operations Centre
Operating Systems
1 22 (100.00%) Linux
2 7 (31.82%) Ubuntu
3 3 (13.64%) Red Hat Enterprise Linux
4 2 (9.09%) Windows
5 1 (4.55%) Debian
5 1 (4.55%) Fedora
5 1 (4.55%) Solaris
5 1 (4.55%) Unix
5 1 (4.55%) Windows Server
5 1 (4.55%) Windows Server 2008
5 1 (4.55%) Windows Server 2012
Processes & Methodologies
1 17 (77.27%) DevOps
2 5 (22.73%) Analytics
2 5 (22.73%) Big Data Analytics
2 5 (22.73%) Cloud Operations
2 5 (22.73%) Configuration Management
2 5 (22.73%) Data Analytics
3 3 (13.64%) Continuous Integration
3 3 (13.64%) Immutable Infrastructure
4 2 (9.09%) Agile Software Development
4 2 (9.09%) High-Frequency Trading
4 2 (9.09%) Low Latency
4 2 (9.09%) Microservices
4 2 (9.09%) SDLC
4 2 (9.09%) System Testing
4 2 (9.09%) Test Automation
5 1 (4.55%) Patch Management
5 1 (4.55%) Proactive Monitoring
5 1 (4.55%) Release Management
5 1 (4.55%) Security Operations
5 1 (4.55%) Security Patching
Programming Languages
1 8 (36.36%) Bash Shell
1 8 (36.36%) Python
2 5 (22.73%) Perl
3 4 (18.18%) Ruby
4 2 (9.09%) C
4 2 (9.09%) C++
4 2 (9.09%) Java
4 2 (9.09%) Shell Script
5 1 (4.55%) Groovy
5 1 (4.55%) Korn
5 1 (4.55%) PHP
5 1 (4.55%) PowerShell
Qualifications
1 3 (13.64%) Degree
2 2 (9.09%) Computer Science Degree
3 1 (4.55%) SC Cleared
3 1 (4.55%) Security Cleared
System Software
1 10 (45.45%) Docker
2 1 (4.55%) Hyper-V
2 1 (4.55%) iptables
2 1 (4.55%) Virtual Machines
2 1 (4.55%) VMware Infrastructure
Systems Management
1 13 (59.09%) Terraform
2 10 (45.45%) Kubernetes
3 9 (40.91%) Ansible
4 6 (27.27%) Puppet
5 5 (22.73%) Nagios
6 3 (13.64%) Opscode Chef
6 3 (13.64%) Prometheus
7 1 (4.55%) Cacti
7 1 (4.55%) Docker Swarm
7 1 (4.55%) Grafana
7 1 (4.55%) Icinga
7 1 (4.55%) Kibana
7 1 (4.55%) logstash
7 1 (4.55%) Marathon
7 1 (4.55%) Mesos
7 1 (4.55%) NetBackup
7 1 (4.55%) Packer
7 1 (4.55%) Salt
7 1 (4.55%) SELinux
7 1 (4.55%) Systems Management Server (SMS)
Vendors
1 10 (45.45%) Red Hat
2 4 (18.18%) Google
3 2 (9.09%) Cisco
4 1 (4.55%) CommVault
4 1 (4.55%) EMC
4 1 (4.55%) NetApp
4 1 (4.55%) VMware