Period
to 23 October 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 23 October 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
23 Oct 2019
Same period 2018 Same period 2017
Rank 395 375 402
Rank change year-on-year -20 +27 -60
Contract jobs citing CentOS 484 682 607
As % of all contract IT jobs advertised in the UK 0.57% 0.66% 0.61%
As % of the Operating Systems category 2.74% 3.15% 2.91%
Number of daily rates quoted 290 441 426
UK median daily rate £500 £500 £475
Median daily rate % change year-on-year - +5.26% +2.70%
10th Percentile £313 £375 £330
90th Percentile £656 £625 £600
UK excluding London median daily rate £485 £450 £425
% change year-on-year +7.78% +5.88% -
Number of hourly rates quoted 6 6 14
UK median hourly rate £29.38 £44.58 £32.88
Median hourly rate % change year-on-year -34.10% +35.60% +108.73%
10th Percentile £19.95 £26.32 £17.00
90th Percentile £35.00 £55.00 £48.75
UK excluding London median hourly rate £35.00 £41.83 £35.00
% change year-on-year -16.32% +19.50% +122.22%

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 17,660 21,647 20,883
As % of all contract IT jobs advertised in the UK 20.85% 20.92% 20.84%
Number of daily rates quoted 10,974 13,393 13,203
UK median daily rate £425 £425 £425
10th Percentile £150 £163 £175
90th Percentile £613 £606 £595
UK excluding London median daily rate £400 £388 £375
% change year-on-year +3.23% +3.33% -
Number of hourly rates quoted 1,248 1,517 1,245
UK median hourly rate £17.50 £17.50 £17.50
10th Percentile £11.17 £11.00 £10.96
90th Percentile £50.00 £47.50 £47.83
UK excluding London median hourly rate £17.00 £16.50 £16.81
% change year-on-year +3.03% -1.81% +5.03%

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 23 October 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 23 October 2019.

Contractor hourly rate histogram for CentOS in the UK

CentOS
Top 15 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 23 October 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 -59 400 £500 - 156
UK excluding London +24 333 £485 +7.78% 100
London -61 141 £525 -4.55% 64
North of England -28 66 £500 +0.91% 14
South West +4 63 £468 +13.33% 24
Scotland +70 62 £550 +10.00% 4
Midlands +79 45 £400 - 9
South East -8 44 £450 +2.27% 38
East of England +19 41 £525 +20.98% 7
North West -9 31 £465 -5.39% 7
West Midlands +49 23 £400 - 5
East Midlands +40 22 £350 -12.50% 4
Yorkshire +18 20 £544 +20.83% 5
North East -6 15 £495 -5.71% 2
Wales - 13 £425 - 4

For the 6 months to 23 October 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.

1 484 (100.00%) Linux
2 238 (49.17%) DevOps
3 220 (45.45%) Red Hat Enterprise Linux
4 199 (41.12%) AWS
5 193 (39.88%) Red Hat
6 187 (38.64%) Python
6 187 (38.64%) Ansible
7 169 (34.92%) Jenkins
8 167 (34.50%) Terraform
9 163 (33.68%) Bash Shell
10 154 (31.82%) Security Cleared
11 151 (31.20%) Agile Software Development
12 147 (30.37%) Puppet
13 135 (27.89%) Windows
14 129 (26.65%) Git (software)
15 122 (25.21%) Ubuntu
16 121 (25.00%) Java
17 120 (24.79%) MySQL
18 117 (24.17%) Azure
19 104 (21.49%) SC Cleared
19 104 (21.49%) VMware
20 100 (20.66%) Docker
21 99 (20.45%) Kubernetes
22 98 (20.25%) Microservices
23 87 (17.98%) Configuration Management
24 86 (17.77%) JIRA
25 78 (16.12%) Opscode Chef
26 76 (15.70%) Active Directory
27 73 (15.08%) Continuous Integration
28 69 (14.26%) Unix

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 62 (12.81%) Apache
2 43 (8.88%) Tomcat
3 37 (7.64%) Confluence
4 30 (6.20%) JBoss
5 24 (4.96%) nginx
6 23 (4.75%) Apache Spark
7 19 (3.93%) IIS
8 18 (3.72%) OpenStack
9 13 (2.69%) Elasticsearch
10 8 (1.65%) SharePoint
11 7 (1.45%) Jetty
11 7 (1.45%) Jupyter
11 7 (1.45%) SAS
11 7 (1.45%) WebLogic
12 6 (1.24%) Oracle Self-Service HR
13 2 (0.41%) MS Exchange
13 2 (0.41%) SharePoint 2010
13 2 (0.41%) SharePoint 2013
13 2 (0.41%) Skype for Business
13 2 (0.41%) WebSphere
Applications
1 12 (2.48%) Microsoft Office
2 4 (0.83%) Microsoft Excel
3 1 (0.21%) Microsoft Project
3 1 (0.21%) MS Visio
Business Applications
1 1 (0.21%) NetSuite
1 1 (0.21%) Sparx Enterprise Architect
Cloud Services
1 199 (41.12%) AWS
2 117 (24.17%) Azure
3 55 (11.36%) GCP
4 33 (6.82%) Amazon EC2
5 30 (6.20%) Virtual Private Cloud
6 27 (5.58%) Amazon S3
7 25 (5.17%) Amazon CloudWatch
7 25 (5.17%) AWS CloudFormation
8 23 (4.75%) Route 53
9 17 (3.51%) GitHub
10 16 (3.31%) Amazon EKS
11 14 (2.89%) Cloud Computing
12 13 (2.69%) Office 365
13 12 (2.48%) Amazon ELB
13 12 (2.48%) CloudFront
14 11 (2.27%) OpenShift
15 10 (2.07%) PaaS
16 9 (1.86%) Amazon EMR
16 9 (1.86%) IaaS
17 6 (1.24%) Slack
Communications & Networking
1 46 (9.50%) Firewall
2 39 (8.06%) DNS
2 39 (8.06%) TCP/IP
3 34 (7.02%) VPN
4 32 (6.61%) SAN
5 28 (5.79%) WAN
6 24 (4.96%) LAN
7 20 (4.13%) HTTP
8 15 (3.10%) SSH
8 15 (3.10%) VLAN
9 13 (2.69%) DHCP
9 13 (2.69%) Wireless
10 11 (2.27%) Internet
11 10 (2.07%) Kerberos
11 10 (2.07%) MPLS
12 9 (1.86%) Ethernet
12 9 (1.86%) IGMP
12 9 (1.86%) Multicast
12 9 (1.86%) OSPF
13 8 (1.65%) Network Security
Database & Business Intelligence
1 120 (24.79%) MySQL
2 40 (8.26%) Hadoop
3 39 (8.06%) PostgreSQL
4 37 (7.64%) MariaDB
5 31 (6.40%) Big Data
5 31 (6.40%) SQL Server
6 30 (6.20%) Amazon RDS
7 28 (5.79%) MongoDB
8 26 (5.37%) Oracle Database
9 25 (5.17%) Relational Database
10 18 (3.72%) Amazon Aurora
11 17 (3.51%) RDBMS
12 16 (3.31%) Apache Cassandra
13 11 (2.27%) Data Lake
13 11 (2.27%) Ingres
14 9 (1.86%) Apache Hive
15 8 (1.65%) Impala
16 7 (1.45%) Apache Zeppelin
16 7 (1.45%) Cloudera CDH
17 5 (1.03%) NoSQL
Development Applications
1 169 (34.92%) Jenkins
2 129 (26.65%) Git (software)
3 86 (17.77%) JIRA
4 40 (8.26%) SonarQube
5 32 (6.61%) Maven
5 32 (6.61%) Vagrant
6 27 (5.58%) Sonatype Nexus
7 23 (4.75%) Bitbucket
8 21 (4.34%) JUnit
8 21 (4.34%) Subversion
9 19 (3.93%) Artifactory
10 16 (3.31%) CircleCI
10 16 (3.31%) Mercurial
10 16 (3.31%) SoapUI
11 12 (2.48%) Cucumber
12 11 (2.27%) Hudson
13 10 (2.07%) Atlassian Bamboo
13 10 (2.07%) FindBugs
13 10 (2.07%) GitLab
13 10 (2.07%) Log4j
General
1 57 (11.78%) Public Sector
2 28 (5.79%) Finance
3 19 (3.93%) Banking
4 11 (2.27%) Back Office
5 8 (1.65%) Automotive
5 8 (1.65%) Games
6 7 (1.45%) Telecoms
7 4 (0.83%) Retail
8 3 (0.62%) Electronics
8 3 (0.62%) Manufacturing
8 3 (0.62%) Marketing
8 3 (0.62%) Publishing
9 2 (0.41%) Legal
10 1 (0.21%) Advertising
10 1 (0.21%) Law
10 1 (0.21%) Retail Banking
Job Titles
1 140 (28.93%) DevOps Engineer
2 58 (11.98%) Developer
3 48 (9.92%) Administrator
4 45 (9.30%) Linux Engineer
5 35 (7.23%) Infrastructure Engineer
6 29 (5.99%) Java Developer
6 29 (5.99%) Systems Administrator
7 27 (5.58%) Cloud Engineer
7 27 (5.58%) Platform Engineer
8 26 (5.37%) Lead DevOps
8 26 (5.37%) Linux/Unix DevOps
9 25 (5.17%) Lead Developer
9 25 (5.17%) Linux Administrator
9 25 (5.17%) Senior DevOps
10 24 (4.96%) Senior DevOps Engineer
11 22 (4.55%) Linux DevOps Engineer
12 21 (4.34%) Architect
13 20 (4.13%) Lead DevOps Engineer
13 20 (4.13%) Linux Systems Administrator
14 19 (3.93%) AWS Engineer
Libraries, Frameworks & Software Standards
1 49 (10.12%) Spring
2 39 (8.06%) RabbitMQ
3 37 (7.64%) .NET
3 37 (7.64%) LAMP
4 35 (7.23%) Node.js
5 33 (6.82%) Spring Boot
6 30 (6.20%) LDAP
7 27 (5.58%) Kafka
8 25 (5.17%) Elastic Stack
9 24 (4.96%) Middleware
10 20 (4.13%) LEMP Stack
11 17 (3.51%) REST
11 17 (3.51%) SOAP
12 16 (3.31%) RESTful
13 15 (3.10%) XML
14 13 (2.69%) AngularJS
15 12 (2.48%) ActiveMQ
15 12 (2.48%) Apache Camel
15 12 (2.48%) JSON
16 10 (2.07%) HTML
Miscellaneous
1 56 (11.57%) Public Cloud
2 23 (4.75%) Clustering
3 22 (4.55%) Data Centre
4 16 (3.31%) Cloud Native
5 9 (1.86%) Driving Licence
5 9 (1.86%) Linux Command Line
5 9 (1.86%) Replication
6 8 (1.65%) Management Information System
6 8 (1.65%) User Experience
7 7 (1.45%) Self-Motivation
8 6 (1.24%) Analytical Skills
8 6 (1.24%) Derivative
9 5 (1.03%) Algorithms
10 4 (0.83%) Cyberthreat
10 4 (0.83%) Data Structures
10 4 (0.83%) Enterprise Storage
10 4 (0.83%) Hedge funds
10 4 (0.83%) PKI
11 3 (0.62%) CMDB
12 2 (0.41%) Device Driver
Operating Systems
1 484 (100.00%) Linux
2 220 (45.45%) Red Hat Enterprise Linux
3 135 (27.89%) Windows
4 122 (25.21%) Ubuntu
5 69 (14.26%) Unix
6 60 (12.40%) Windows Server
7 45 (9.30%) Debian
8 37 (7.64%) Windows Server 2012
9 35 (7.23%) Solaris
10 21 (4.34%) Windows Server 2008
11 18 (3.72%) CoreOS
12 15 (3.10%) Mac OS X
13 12 (2.48%) Windows 7
14 10 (2.07%) Apple iOS
15 9 (1.86%) Android
16 8 (1.65%) Windows 10
17 7 (1.45%) AIX
18 4 (0.83%) Fedora
18 4 (0.83%) Mac OS X Server
19 3 (0.62%) Windows Server 2003
Processes & Methodologies
1 238 (49.17%) DevOps
2 151 (31.20%) Agile Software Development
3 98 (20.25%) Microservices
4 87 (17.98%) Configuration Management
5 73 (15.08%) Continuous Integration
6 64 (13.22%) Scrum
7 62 (12.81%) Infrastructure as Code
8 48 (9.92%) TDD
9 45 (9.30%) Infrastructure Engineering
10 44 (9.09%) Migration
11 42 (8.68%) Mentoring
12 40 (8.26%) Test Automation
13 38 (7.85%) ITIL
13 38 (7.85%) Project Delivery
13 38 (7.85%) Software Engineering
14 37 (7.64%) Technical Leadership
15 36 (7.44%) Kanban
16 31 (6.40%) Open Source
16 31 (6.40%) Service Management
17 30 (6.20%) Problem-Solving
Programming Languages
1 187 (38.64%) Python
2 163 (33.68%) Bash Shell
3 121 (25.00%) Java
4 56 (11.57%) JavaScript
4 56 (11.57%) PowerShell
5 51 (10.54%) SQL
6 50 (10.33%) Shell Script
7 44 (9.09%) Ruby
8 38 (7.85%) PHP
9 35 (7.23%) Perl
10 26 (5.37%) C++
10 26 (5.37%) Groovy
11 24 (4.96%) Go
12 16 (3.31%) C#
12 16 (3.31%) Rust
13 15 (3.10%) TypeScript
14 9 (1.86%) C
14 9 (1.86%) Clojure
15 8 (1.65%) PL/SQL
15 8 (1.65%) T-SQL
Qualifications
1 154 (31.82%) Security Cleared
2 104 (21.49%) SC Cleared
3 34 (7.02%) DV Cleared
4 16 (3.31%) Microsoft Certification
5 13 (2.69%) Sun Certification
6 12 (2.48%) OCPJP
7 10 (2.07%) MCSE
8 8 (1.65%) CEH
8 8 (1.65%) MCSA
8 8 (1.65%) VMware Certified Professional (VCP)
9 7 (1.45%) Degree
10 6 (1.24%) ISTQB
11 5 (1.03%) BPSS Clearance
11 5 (1.03%) CCNA
11 5 (1.03%) Cisco Certification
11 5 (1.03%) CISSP
11 5 (1.03%) DBS Check
11 5 (1.03%) ISEB
11 5 (1.03%) RHCSA
12 4 (0.83%) MCITP
Quality Assurance & Compliance
1 15 (3.10%) NIST
2 13 (2.69%) NCSC
3 9 (1.86%) QA
4 7 (1.45%) Disclosure Scotland
5 5 (1.03%) ISO/IEC 27001
6 3 (0.62%) PMO
6 3 (0.62%) SLA
7 2 (0.41%) COBIT
7 2 (0.41%) PCI DSS
7 2 (0.41%) Sarbanes-Oxley
8 1 (0.21%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
System Software
1 100 (20.66%) Docker
2 76 (15.70%) Active Directory
3 56 (11.57%) VMware Infrastructure
4 34 (7.02%) Hyper-V
5 18 (3.72%) VMware ESXi
6 16 (3.31%) vSphere
7 12 (2.48%) Virtual Servers
8 9 (1.86%) Virtual Machines
8 9 (1.86%) VirtualBox
9 8 (1.65%) KVM
9 8 (1.65%) Samba
10 7 (1.45%) NFS
10 7 (1.45%) Virtual Desktop
11 6 (1.24%) ISA Server
11 6 (1.24%) Snort
12 5 (1.03%) vCloud
12 5 (1.03%) VMware Server
13 4 (0.83%) pfSense
13 4 (0.83%) Xen
14 3 (0.62%) VMware NSX
Systems Management
1 187 (38.64%) Ansible
2 167 (34.50%) Terraform
3 147 (30.37%) Puppet
4 99 (20.45%) Kubernetes
5 78 (16.12%) Opscode Chef
6 46 (9.50%) Packer
7 43 (8.88%) Nagios
8 33 (6.82%) Prometheus
9 29 (5.99%) Grafana
10 23 (4.75%) Consul
11 20 (4.13%) HAProxy
12 18 (3.72%) SCCM
13 15 (3.10%) Salt
14 13 (2.69%) WSUS
15 12 (2.48%) Rancher
15 12 (2.48%) ZABBIX
16 11 (2.27%) Norton AntiVirus
16 11 (2.27%) SCOM
16 11 (2.27%) vCenter Server
17 9 (1.86%) vRealize
Vendors
1 193 (39.88%) Red Hat
2 104 (21.49%) VMware
3 66 (13.64%) Microsoft
4 42 (8.68%) Oracle
5 32 (6.61%) Cloudera
5 32 (6.61%) Splunk
6 30 (6.20%) Google
7 28 (5.79%) Hortonworks
7 28 (5.79%) NetApp
8 26 (5.37%) Cisco
9 19 (3.93%) HP
10 18 (3.72%) Atlassian
11 16 (3.31%) Veracode
12 14 (2.89%) Symantec
13 13 (2.69%) ServiceNow
14 12 (2.48%) Citrix
14 12 (2.48%) Sun
15 11 (2.27%) SolarWinds
16 10 (2.07%) Juniper
16 10 (2.07%) Veeam