Period
to 27 June 2019

The following table provides summary statistics for contract job vacancies 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 27 June 2019 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
UK
6 months to
27 Jun 2019
Same period 2018 Same period 2017
Rank 436 394 339
Rank change year-on-year -42 -55 +76
Contract jobs citing CentOS 476 611 656
As % of all contract IT jobs advertised in the UK 0.52% 0.60% 0.71%
As % of the Operating Systems category 2.60% 2.90% 3.43%
Number of daily rates quoted 276 397 471
UK median daily rate £515 £500 £491
Median daily rate % change year-on-year +3.00% +1.94% +9.00%
10th Percentile £361 £366 £325
90th Percentile £653 £624 £609
UK excluding London median daily rate £500 £463 £475
% change year-on-year +8.11% -2.63% +11.76%
Number of hourly rates quoted 6 5 11
UK median hourly rate £29.38 £49.50 £40.00
Median hourly rate % change year-on-year -40.66% +23.75% -20.00%
10th Percentile £19.89 £16.96 £14.13
90th Percentile £35.00 £57.50 £48.75
UK excluding London median hourly rate £35.00 £34.24 £32.54
% change year-on-year +2.21% +5.23% -40.84%

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 with a requirement for operating system skills.

All Operating Systems
UK
Contract vacancies with a requirement for operating system skills 18,287 21,079 19,146
As % of all contract IT jobs advertised in the UK 20.06% 20.85% 20.79%
Number of daily rates quoted 11,532 13,244 12,053
UK median daily rate £430 £425 £425
Median daily rate % change year-on-year +1.18% - +6.25%
10th Percentile £158 £185 £200
90th Percentile £625 £606 £588
UK excluding London median daily rate £400 £395 £400
% change year-on-year +1.27% -1.25% +6.67%
Number of hourly rates quoted 1,153 1,428 1,133
UK median hourly rate £17.50 £17.47 £16.50
Median hourly rate % change year-on-year +0.20% +5.85% -2.94%
10th Percentile £11.17 £11.17 £10.50
90th Percentile £48.75 £47.50 £47.50
UK excluding London median hourly rate £16.00 £16.00 £15.86
% change year-on-year - +0.88% -3.88%

CentOS
Job Vacancy Trend

Job postings citing CentOS as a percentage of all IT jobs advertised.

Job vacancy trend for CentOS in the UK

CentOS
Contractor Daily Rate Trend

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

Contractor daily rate trend for CentOS in the UK

CentOS
Contractor Daily Rate Histogram

The daily rate distribution of IT jobs citing CentOS over the 6 months to 27 June 2019.

Contractor daily rate histogram for CentOS in the UK

CentOS
Contractor Hourly Rate Trend

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing CentOS.

Contractor hourly rate trend for CentOS in the UK

CentOS
Contractor Hourly Rate Histogram

The hourly rate distribution of IT jobs citing CentOS over the 6 months to 27 June 2019.

Contractor hourly rate histogram for CentOS in the UK

CentOS
Top 14 Contract Locations

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the UK over the 6 months to 27 June 2019. 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
England -65 401 £513 +2.50% 51
UK excluding London +65 324 £500 +8.11% 37
London -132 139 £525 -1.87% 18
North of England +48 83 £475 +13.10% 16
South West +2 65 £619 +23.75% 6
Scotland +84 63 £550 +10.55% 3
East of England +35 55 £525 +23.53% 6
South East -28 30 £425 -15.10% 3
Midlands +24 29 £400 -15.79% 2
Yorkshire +19 29 £525 +25.00% 1
North West +16 28 £538 +13.16% 7
North East +45 26 £425 +1.49% 8
East Midlands +17 16 £500 - 1
West Midlands +9 13 £394 -12.50% 1

For the 6 months to 27 June 2019, 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 with a requirement for CentOS.

1 476 (100.00%) Linux
2 255 (53.57%) Amazon AWS
3 220 (46.22%) Jenkins
4 217 (45.59%) DevOps
5 208 (43.70%) Red Hat
6 207 (43.49%) Red Hat Enterprise Linux
7 193 (40.55%) Terraform
8 188 (39.50%) Python
9 182 (38.24%) Agile Software Development
10 172 (36.13%) Ansible
11 161 (33.82%) Git (software)
12 142 (29.83%) Docker
12 142 (29.83%) Puppet
12 142 (29.83%) Java
13 139 (29.20%) Microservices
14 136 (28.57%) Bash Shell
15 132 (27.73%) Kubernetes
16 131 (27.52%) Unix
17 127 (26.68%) Security Cleared
18 118 (24.79%) JIRA
19 117 (24.58%) MySQL
20 107 (22.48%) Windows
21 105 (22.06%) Microsoft Azure
22 95 (19.96%) Ubuntu
23 93 (19.54%) SC Cleared
24 84 (17.65%) VMware
25 83 (17.44%) Active Directory
26 81 (17.02%) Scrum
27 79 (16.60%) Configuration Management
27 79 (16.60%) Packer

CentOS
Co-occurring IT Skills 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 40 (8.40%) Apache
2 39 (8.19%) Confluence
3 33 (6.93%) JBoss
4 30 (6.30%) Tomcat
5 23 (4.83%) nginx
6 18 (3.78%) IIS
7 16 (3.36%) OpenStack
8 9 (1.89%) Elasticsearch
9 8 (1.68%) GeoServer
10 3 (0.63%) SharePoint
10 3 (0.63%) WebSphere
11 2 (0.42%) Apache Spark
11 2 (0.42%) CMS
11 2 (0.42%) Drupal
11 2 (0.42%) Jetty
11 2 (0.42%) Mailman
11 2 (0.42%) Mongrel
11 2 (0.42%) MS Exchange
11 2 (0.42%) WebLogic
11 2 (0.42%) WordPress
Applications
1 1 (0.21%) Chatbot
1 1 (0.21%) Microsoft PowerPoint
Cloud Services
1 255 (53.57%) Amazon AWS
2 105 (22.06%) Microsoft Azure
3 55 (11.55%) Amazon EC2
4 50 (10.50%) Amazon S3
5 43 (9.03%) Google Cloud Platform
6 40 (8.40%) Virtual Private Cloud
7 33 (6.93%) Amazon EKS
8 32 (6.72%) Route 53
9 27 (5.67%) Amazon ELB
9 27 (5.67%) GitHub
10 25 (5.25%) AWS CloudFormation
11 22 (4.62%) OpenShift
12 18 (3.78%) IaaS
12 18 (3.78%) PaaS
13 14 (2.94%) Amazon ECS
13 14 (2.94%) Slack
14 12 (2.52%) AWS Lambda
14 12 (2.52%) Azure Stack
15 11 (2.31%) Serverless
16 10 (2.10%) Cloud Computing
Communications & Networking
1 36 (7.56%) DNS
1 36 (7.56%) HTTP
2 31 (6.51%) Firewall
3 29 (6.09%) SAN
4 27 (5.67%) LAN
4 27 (5.67%) VPN
4 27 (5.67%) WAN
5 26 (5.46%) TCP/IP
6 18 (3.78%) VLAN
7 13 (2.73%) DHCP
8 11 (2.31%) IPsec
8 11 (2.31%) MPLS
8 11 (2.31%) SSL
8 11 (2.31%) Wireless
9 9 (1.89%) Ethernet
9 9 (1.89%) IGMP
9 9 (1.89%) Multicast
9 9 (1.89%) OSPF
10 7 (1.47%) DMZ
10 7 (1.47%) OpenLDAP
Database & Business Intelligence
1 117 (24.58%) MySQL
2 56 (11.76%) MongoDB
3 51 (10.71%) Oracle Database
4 47 (9.87%) PostgreSQL
5 39 (8.19%) Amazon RDS
6 35 (7.35%) MariaDB
7 28 (5.88%) Apache Cassandra
8 22 (4.62%) Amazon Aurora
9 19 (3.99%) Hadoop
10 17 (3.57%) SQL Server
11 13 (2.73%) Redis
12 11 (2.31%) Big Data
12 11 (2.31%) Relational Database
13 10 (2.10%) Ingres
13 10 (2.10%) RDBMS
14 6 (1.26%) HBase
15 5 (1.05%) Amazon DynamoDB
16 4 (0.84%) Azure SQL Database
16 4 (0.84%) Data Lake
17 3 (0.63%) Data Warehouse
Development Applications
1 220 (46.22%) Jenkins
2 161 (33.82%) Git (software)
3 118 (24.79%) JIRA
4 56 (11.76%) SonarQube
5 49 (10.29%) JUnit
6 42 (8.82%) SoapUI
7 30 (6.30%) Maven
8 26 (5.46%) GitLab
8 26 (5.46%) Sonatype Nexus
9 24 (5.04%) Bitbucket
10 22 (4.62%) Artifactory
11 21 (4.41%) CircleCI
12 14 (2.94%) MSBuild
13 12 (2.52%) Vagrant
14 7 (1.47%) Mercurial
14 7 (1.47%) Subversion
15 6 (1.26%) Hudson
15 6 (1.26%) JMeter
16 4 (0.84%) FindBugs
16 4 (0.84%) Log4j
General
1 25 (5.25%) Finance
2 9 (1.89%) Banking
3 8 (1.68%) Back Office
4 6 (1.26%) Marketing
4 6 (1.26%) Telecoms
5 5 (1.05%) Games
6 4 (0.84%) Electronics
6 4 (0.84%) Manufacturing
7 2 (0.42%) Retail
8 1 (0.21%) Mandarin Language
8 1 (0.21%) Retail Banking
Job Titles
1 145 (30.46%) DevOps Engineer
2 80 (16.81%) Developer
3 54 (11.34%) Java Developer
4 53 (11.13%) Administrator
5 43 (9.03%) Systems Administrator
6 39 (8.19%) Infrastructure Engineer
7 36 (7.56%) Lead Developer
8 34 (7.14%) Linux Administrator
9 29 (6.09%) Linux Systems Administrator
10 28 (5.88%) Lead DevOps
10 28 (5.88%) Linux Engineer
11 27 (5.67%) Lead Java Developer
12 25 (5.25%) Cloud Engineer
12 25 (5.25%) Lead DevOps Engineer
13 24 (5.04%) AWS Engineer
14 23 (4.83%) AWS DevOps
15 20 (4.20%) Architect
15 20 (4.20%) Platform Engineer
16 17 (3.57%) Network Engineer
17 15 (3.15%) Linux/Unix DevOps
Libraries, Frameworks & Software Standards
1 63 (13.24%) Spring
2 55 (11.55%) Spring Boot
3 52 (10.92%) SOAP
4 49 (10.29%) Kafka
5 48 (10.08%) Elastic Stack
6 41 (8.61%) Node.js
7 39 (8.19%) LDAP
8 32 (6.72%) RabbitMQ
9 30 (6.30%) .NET
9 30 (6.30%) Middleware
10 26 (5.46%) RESTful
11 21 (4.41%) Web Services
12 17 (3.57%) HTML
13 15 (3.15%) J2EE
14 13 (2.73%) JSON
15 12 (2.52%) CSS
15 12 (2.52%) XML
16 11 (2.31%) HTML5
17 10 (2.10%) LAPP Stack
17 10 (2.10%) REST
Miscellaneous
1 30 (6.30%) Public Cloud
2 24 (5.04%) Cloud Native
3 19 (3.99%) Data Centre
4 16 (3.36%) Management Information System
5 15 (3.15%) Clustering
6 14 (2.94%) Analytical Skills
7 13 (2.73%) Device Driver
7 13 (2.73%) Replication
8 11 (2.31%) PKI
9 9 (1.89%) Driving Licence
10 8 (1.68%) Greenfield Project
11 4 (0.84%) Blog
11 4 (0.84%) Hybrid Cloud
11 4 (0.84%) Private Cloud
12 3 (0.63%) Smartcard
13 2 (0.42%) Enterprise Cloud
13 2 (0.42%) Fat Client
13 2 (0.42%) NHS
13 2 (0.42%) Thin Client
13 2 (0.42%) Wiki
Operating Systems
1 476 (100.00%) Linux
2 207 (43.49%) Red Hat Enterprise Linux
3 131 (27.52%) Unix
4 107 (22.48%) Windows
5 95 (19.96%) Ubuntu
6 46 (9.66%) Debian
7 41 (8.61%) Windows Server
8 40 (8.40%) Solaris
9 22 (4.62%) Windows Server 2012
10 21 (4.41%) CoreOS
11 15 (3.15%) Fedora
12 13 (2.73%) Windows Server 2008
13 6 (1.26%) AIX
13 6 (1.26%) SUSE
14 4 (0.84%) Windows 10
14 4 (0.84%) Windows 7
15 3 (0.63%) Mesosphere
15 3 (0.63%) Windows Server 2003
16 2 (0.42%) Gentoo
16 2 (0.42%) Mac OS X
Processes & Methodologies
1 217 (45.59%) DevOps
2 182 (38.24%) Agile Software Development
3 139 (29.20%) Microservices
4 81 (17.02%) Scrum
5 79 (16.60%) Configuration Management
6 73 (15.34%) TDD
7 70 (14.71%) Continuous Integration
8 54 (11.34%) Scaled Agile Framework
9 49 (10.29%) BDD
10 45 (9.45%) Infrastructure as Code
11 42 (8.82%) Infrastructure Engineering
11 42 (8.82%) Technical Leadership
12 38 (7.98%) Immutable Infrastructure
12 38 (7.98%) Service Management
13 36 (7.56%) Migration
13 36 (7.56%) Problem-Solving
14 35 (7.35%) Mentoring
15 34 (7.14%) Software Engineering
16 31 (6.51%) Infrastructure Automation
17 30 (6.30%) Open Source
Programming Languages
1 188 (39.50%) Python
2 142 (29.83%) Java
3 136 (28.57%) Bash Shell
4 56 (11.76%) JavaScript
5 49 (10.29%) PowerShell
6 48 (10.08%) Shell Script
7 43 (9.03%) Go
8 41 (8.61%) SQL
9 37 (7.77%) Ruby
10 24 (5.04%) Groovy
11 21 (4.41%) Rust
12 15 (3.15%) TypeScript
13 14 (2.94%) C#
14 13 (2.73%) Perl
15 12 (2.52%) C
16 9 (1.89%) C++
16 9 (1.89%) PHP
17 8 (1.68%) Java 8
18 6 (1.26%) Korn
19 2 (0.42%) C-shell
Qualifications
1 127 (26.68%) Security Cleared
2 93 (19.54%) SC Cleared
3 28 (5.88%) DV Cleared
4 20 (4.20%) OCPJP
4 20 (4.20%) Sun Certification
5 16 (3.36%) Degree
6 14 (2.94%) Computer Science Degree
7 10 (2.10%) Microsoft Certification
8 9 (1.89%) Master's Degree
9 7 (1.47%) MCSA
10 4 (0.84%) CEH
11 3 (0.63%) CISSP
11 3 (0.63%) MCSE
12 2 (0.42%) AWS Certification
12 2 (0.42%) VMware Certified Professional (VCP)
13 1 (0.21%) BPSS Clearance
13 1 (0.21%) DBS Check
13 1 (0.21%) ISTQB
13 1 (0.21%) ITIL Foundation Certificate
13 1 (0.21%) MCITP
Quality Assurance & Compliance
1 16 (3.36%) NCSC
1 16 (3.36%) NIST
2 5 (1.05%) QA
3 3 (0.63%) Disclosure Scotland
4 2 (0.42%) ISO/IEC 27001
System Software
1 142 (29.83%) Docker
2 83 (17.44%) Active Directory
3 44 (9.24%) VMware Infrastructure
4 15 (3.15%) Hyper-V
5 12 (2.52%) Snort
5 12 (2.52%) vSphere
6 11 (2.31%) VMware ESXi
7 10 (2.10%) KVM
8 9 (1.89%) Squid
8 9 (1.89%) Xen
9 6 (1.26%) Samba
10 5 (1.05%) ISA Server
10 5 (1.05%) NFS
10 5 (1.05%) vCloud
11 3 (0.63%) Varnish
11 3 (0.63%) VirtualBox
11 3 (0.63%) VMware Server
12 2 (0.42%) Apache ZooKeeper
12 2 (0.42%) Firmware
12 2 (0.42%) Terminal Server
Systems Management
1 193 (40.55%) Terraform
2 172 (36.13%) Ansible
3 142 (29.83%) Puppet
4 132 (27.73%) Kubernetes
5 79 (16.60%) Packer
6 70 (14.71%) Opscode Chef
7 54 (11.34%) Prometheus
8 47 (9.87%) Grafana
9 33 (6.93%) Nagios
10 26 (5.46%) Consul
11 17 (3.57%) Icinga
11 17 (3.57%) Rancher
11 17 (3.57%) SCCM
12 16 (3.36%) HAProxy
13 12 (2.52%) vRealize
13 12 (2.52%) ZABBIX
14 9 (1.89%) vCenter Server
15 8 (1.68%) FortiGate
15 8 (1.68%) Kibana
15 8 (1.68%) Norton AntiVirus
Vendors
1 208 (43.70%) Red Hat
2 84 (17.65%) VMware
3 62 (13.03%) Oracle
4 48 (10.08%) Microsoft
5 42 (8.82%) Splunk
6 30 (6.30%) Google
7 23 (4.83%) Atlassian
8 22 (4.62%) Cisco
8 22 (4.62%) NetApp
9 21 (4.41%) Veracode
10 20 (4.20%) ServiceNow
10 20 (4.20%) Sun
11 16 (3.36%) Black Duck
11 16 (3.36%) Citrix
12 14 (2.94%) AppDynamics
13 13 (2.73%) HP
14 12 (2.52%) Micro Focus
15 8 (1.68%) Dynatrace
15 8 (1.68%) Symantec
16 6 (1.26%) Cloudera