Period
to

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 9 August 2022 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
9 Aug 2022
Same period 2021 Same period 2020
Rank 488 444 322
Rank change year-on-year -44 -122 +133
Contract jobs citing CentOS 119 81 65
As % of all contract jobs advertised in London 0.30% 0.26% 0.43%
As % of the Operating Systems category 2.15% 1.88% 2.44%
Number of daily rates quoted 91 56 41
10th Percentile £400 £391 £388
25th Percentile £494 £459 £413
Median daily rate (50th Percentile) £625 £538 £505
Median % change year-on-year +16.28% +6.44% -2.65%
75th Percentile £688 £669 £556
90th Percentile £850 £738 £600
England median daily rate £600 £500 £510
% change year-on-year +20.00% -1.96% +2.00%
Number of hourly rates quoted 3 0 1
10th Percentile £22.48 - -
25th Percentile £23.19 - £35.25
Median hourly rate £28.75 - £35.50
75th Percentile £65.31 - £35.75
90th Percentile £84.63 - -
England median hourly rate £28.75 - £39.50
% change year-on-year - - +134.28%

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 5,546 4,307 2,659
As % of all contract IT jobs advertised in London 13.92% 14.03% 17.40%
Number of daily rates quoted 4,045 3,044 1,911
10th Percentile £234 £289 £225
25th Percentile £413 £413 £363
Median daily rate (50th Percentile) £550 £525 £485
Median % change year-on-year +4.76% +8.25% +2.11%
75th Percentile £675 £628 £575
90th Percentile £763 £700 £660
England median daily rate £500 £475 £450
% change year-on-year +5.26% +5.56% +4.65%
Number of hourly rates quoted 82 61 47
10th Percentile £15.78 £15.00 £14.73
25th Percentile £20.06 £16.28 £19.39
Median hourly rate £23.91 £25.00 £27.50
Median % change year-on-year -4.36% -9.09% +31.48%
75th Percentile £44.59 £53.00 £47.54
90th Percentile £67.05 £65.00 £52.55
England median hourly rate £23.00 £17.50 £18.50
% change year-on-year +31.43% -5.41% +5.71%

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 9 August 2022.

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
Hourly Rate Histogram in London

Hourly rate distribution of jobs citing CentOS in London over the 6 months to 9 August 2022.

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 9 August 2022. 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
Jobs
Central London -20 17 £550 +4.76% 8
South London - 2 £685 - 3
CentOS
England

For the 6 months to 9 August 2022, 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.

1 119 (100.00%) Linux
2 79 (66.39%) Red Hat Enterprise Linux
3 67 (56.30%) Puppet
4 66 (55.46%) Ansible
5 65 (54.62%) Terraform
6 64 (53.78%) Bash
7 63 (52.94%) Python
8 58 (48.74%) DevOps
9 57 (47.90%) AWS
10 53 (44.54%) Red Hat
11 52 (43.70%) Docker
11 52 (43.70%) CI/CD
12 51 (42.86%) Configuration Management
13 44 (36.97%) Jenkins
13 44 (36.97%) Kubernetes
14 42 (35.29%) Git (software)
15 41 (34.45%) Containerisation
16 40 (33.61%) ZABBIX
16 40 (33.61%) VMware
17 39 (32.77%) Ruby
18 38 (31.93%) Splunk
18 38 (31.93%) Packer
19 37 (31.09%) Prometheus
19 37 (31.09%) AWS CloudFormation
20 35 (29.41%) Load Balancing
21 34 (28.57%) PKI
21 34 (28.57%) DNS
22 33 (27.73%) nginx
22 33 (27.73%) VMware Infrastructure
23 32 (26.89%) Continuous Integration

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 33 (27.73%) nginx
2 26 (21.85%) Traefik
3 8 (6.72%) Apache
4 4 (3.36%) Apache Airflow
4 4 (3.36%) OpenStack
5 3 (2.52%) Confluence
5 3 (2.52%) Tomcat
Applications
1 2 (1.68%) Microsoft Office
Cloud Services
1 57 (47.90%) AWS
2 37 (31.09%) AWS CloudFormation
3 32 (26.89%) GCP
4 30 (25.21%) Amazon EC2
5 29 (24.37%) Virtual Private Cloud
6 23 (19.33%) Amazon CloudWatch
7 19 (15.97%) Azure
8 10 (8.40%) Azure DevOps
9 8 (6.72%) GitHub
10 7 (5.88%) Serverless
11 6 (5.04%) AWS Lambda
12 5 (4.20%) AWS Fargate
12 5 (4.20%) PaaS
13 4 (3.36%) Amazon ECS
13 4 (3.36%) Amazon S3
13 4 (3.36%) AWS CodePipeline
13 4 (3.36%) Tricentis Tosca
14 3 (2.52%) AWS Direct Connect
15 2 (1.68%) AWS CodeDeploy
15 2 (1.68%) AWS Step Functions
Communications & Networking
1 34 (28.57%) DNS
2 28 (23.53%) TCP/IP
3 8 (6.72%) Firewall
4 6 (5.04%) SSL
5 5 (4.20%) DHCP
5 5 (4.20%) Internet
6 4 (3.36%) Network Security
7 3 (2.52%) IPsec
7 3 (2.52%) IPv6
8 2 (1.68%) HTTP
8 2 (1.68%) HTTPS
8 2 (1.68%) IPv4
8 2 (1.68%) VPN
9 1 (0.84%) BGP
9 1 (0.84%) FTP
9 1 (0.84%) Kerberos
9 1 (0.84%) LAN
9 1 (0.84%) SMTP
9 1 (0.84%) SNMP
9 1 (0.84%) WAN
Database & Business Intelligence
1 7 (5.88%) PostgreSQL
2 6 (5.04%) MySQL
3 4 (3.36%) Couchbase
3 4 (3.36%) Hadoop
3 4 (3.36%) NoSQL
4 3 (2.52%) Data Warehouse
5 2 (1.68%) Amazon Aurora
5 2 (1.68%) Amazon RDS
5 2 (1.68%) DynamoDB
5 2 (1.68%) Elasticsearch
5 2 (1.68%) SQL Server
6 1 (0.84%) Apache Cassandra
6 1 (0.84%) DTS
6 1 (0.84%) MariaDB
6 1 (0.84%) MongoDB
6 1 (0.84%) Redis
6 1 (0.84%) Squirro
Development Applications
1 44 (36.97%) Jenkins
2 42 (35.29%) Git (software)
3 32 (26.89%) GitLab
4 15 (12.61%) JIRA
5 5 (4.20%) TeamCity
6 3 (2.52%) Sonatype Nexus
7 2 (1.68%) CircleCI
7 2 (1.68%) Terragrunt
8 1 (0.84%) Gradle
8 1 (0.84%) Maven
8 1 (0.84%) Newman
8 1 (0.84%) SonarQube
General
1 19 (15.97%) Finance
2 17 (14.29%) Social Skills
3 10 (8.40%) Analytical Skills
4 9 (7.56%) Public Sector
5 7 (5.88%) Retail
6 4 (3.36%) Telecoms
7 1 (0.84%) Banking
Job Titles
1 50 (42.02%) DevOps Engineer
2 21 (17.65%) Linux Engineer
3 16 (13.45%) Platform Engineer
4 12 (10.08%) AWS Engineer
4 12 (10.08%) Operations Engineer
5 10 (8.40%) Administrator
5 10 (8.40%) AWS DevOps
5 10 (8.40%) AWS DevOps Engineer
5 10 (8.40%) Linux Administrator
6 8 (6.72%) Senior DevOps
7 7 (5.88%) Linux Systems Administrator
7 7 (5.88%) Systems Administrator
8 6 (5.04%) Infrastructure Engineer
9 5 (4.20%) Architect
9 5 (4.20%) Data Science Engineer
9 5 (4.20%) Senior DevOps Engineer
10 4 (3.36%) Azure DevOps Engineer
10 4 (3.36%) Azure Engineer
10 4 (3.36%) Site Reliability Engineer
10 4 (3.36%) Systems Engineer
Libraries, Frameworks & Software Standards
1 27 (22.69%) cloud-init
2 7 (5.88%) LDAP
3 4 (3.36%) Elastic Stack
3 4 (3.36%) Kafka
3 4 (3.36%) LAPP Stack
4 3 (2.52%) Keycloak
4 3 (2.52%) Node.js
5 2 (1.68%) EJB
5 2 (1.68%) ModSecurity
6 1 (0.84%) Backbone.js
6 1 (0.84%) D3.js
6 1 (0.84%) Flask
6 1 (0.84%) LEMP Stack
6 1 (0.84%) React
6 1 (0.84%) Spring
6 1 (0.84%) Spring Boot
6 1 (0.84%) Underscore.js
6 1 (0.84%) YAML
Miscellaneous
1 34 (28.57%) PKI
2 26 (21.85%) Clustering
3 9 (7.56%) Public Cloud
4 5 (4.20%) Data Centre
5 4 (3.36%) Management Information System
5 4 (3.36%) Private Cloud
6 2 (1.68%) Wiki
7 1 (0.84%) Distributed Denial-of-Service
7 1 (0.84%) Enterprise Software
7 1 (0.84%) Linux Command Line
Operating Systems
1 119 (100.00%) Linux
2 79 (66.39%) Red Hat Enterprise Linux
3 21 (17.65%) Ubuntu
4 18 (15.13%) Unix
5 12 (10.08%) Windows
6 7 (5.88%) Debian
7 6 (5.04%) Windows Server
8 4 (3.36%) Oracle Linux
8 4 (3.36%) VMS
9 3 (2.52%) HPUX
9 3 (2.52%) Scientific Linux
9 3 (2.52%) SUSE
9 3 (2.52%) Windows Server 2008
9 3 (2.52%) Windows Server 2016
10 2 (1.68%) Alpine Linux
10 2 (1.68%) Amazon Linux
11 1 (0.84%) AIX
11 1 (0.84%) Kali Linux
11 1 (0.84%) Solaris
11 1 (0.84%) Windows Server 2012
Processes & Methodologies
1 58 (48.74%) DevOps
2 52 (43.70%) CI/CD
3 51 (42.86%) Configuration Management
4 41 (34.45%) Containerisation
5 35 (29.41%) Load Balancing
6 32 (26.89%) Continuous Integration
7 29 (24.37%) Agile
8 27 (22.69%) Continuous Deployment
9 22 (18.49%) Unit Testing
10 20 (16.81%) Microservices
11 15 (12.61%) Platform Engineering
12 14 (11.76%) Project Delivery
12 14 (11.76%) Task Automation
13 10 (8.40%) Disaster Recovery
14 9 (7.56%) Analytics
14 9 (7.56%) Auto-Scaling
15 8 (6.72%) Data Science
15 8 (6.72%) Infrastructure as Code
15 8 (6.72%) Scrum
15 8 (6.72%) Security Hardening
Programming Languages
1 64 (53.78%) Bash
2 63 (52.94%) Python
3 39 (32.77%) Ruby
4 27 (22.69%) Go
5 18 (15.13%) Perl
6 11 (9.24%) Shell Script
7 10 (8.40%) PowerShell
8 9 (7.56%) Java
9 6 (5.04%) JavaScript
10 4 (3.36%) SQL
11 2 (1.68%) Groovy
11 2 (1.68%) Rust
11 2 (1.68%) TypeScript
12 1 (0.84%) C
Qualifications
1 21 (17.65%) Security Cleared
2 17 (14.29%) SC Cleared
3 4 (3.36%) BPSS Clearance
4 3 (2.52%) AWS Certification
4 3 (2.52%) CCNA
4 3 (2.52%) Cisco Certification
5 2 (1.68%) CCA
6 1 (0.84%) DV Cleared
6 1 (0.84%) ITIL Foundation Certificate
6 1 (0.84%) JNCIA
6 1 (0.84%) MCITP
6 1 (0.84%) MCSA
6 1 (0.84%) Microsoft Certification
Quality Assurance & Compliance
1 27 (22.69%) NCSC
2 4 (3.36%) OASIS TOSCA
2 4 (3.36%) SLA
3 3 (2.52%) ISO/IEC 27001
3 3 (2.52%) QA
4 2 (1.68%) Disclosure Scotland
5 1 (0.84%) NIST
System Software
1 52 (43.70%) Docker
2 33 (27.73%) VMware Infrastructure
3 8 (6.72%) Active Directory
4 5 (4.20%) Virtual Servers
5 4 (3.36%) Apache ZooKeeper
5 4 (3.36%) Hyper-V
5 4 (3.36%) Virtual Machines
5 4 (3.36%) vSphere
6 3 (2.52%) VMware ESXi
7 2 (1.68%) Firmware
7 2 (1.68%) iptables
7 2 (1.68%) Snort
7 2 (1.68%) Squid
8 1 (0.84%) NFS
8 1 (0.84%) Oracle RAC
8 1 (0.84%) Samba
Systems Management
1 67 (56.30%) Puppet
2 66 (55.46%) Ansible
3 65 (54.62%) Terraform
4 44 (36.97%) Kubernetes
5 40 (33.61%) ZABBIX
6 38 (31.93%) Packer
7 37 (31.09%) Prometheus
8 31 (26.05%) HAProxy
9 29 (24.37%) Consul
10 28 (23.53%) Graphite
11 27 (22.69%) Podman
12 26 (21.85%) Docker Swarm
13 21 (17.65%) Istio
13 21 (17.65%) linkerd
14 13 (10.92%) Grafana
14 13 (10.92%) Opscode Chef
15 10 (8.40%) Red Hat Satellite
16 5 (4.20%) Rancher
17 3 (2.52%) IBM BigFix
17 3 (2.52%) vCenter Server
Vendors
1 53 (44.54%) Red Hat
2 40 (33.61%) VMware
3 38 (31.93%) Splunk
4 23 (19.33%) PagerDuty
5 13 (10.92%) Microsoft
6 8 (6.72%) AppDynamics
7 5 (4.20%) Cisco
7 5 (4.20%) Oracle
8 4 (3.36%) F5
9 3 (2.52%) Citrix
9 3 (2.52%) Jitterbit
10 2 (1.68%) Dell
10 2 (1.68%) Dynatrace
10 2 (1.68%) SaltStack
11 1 (0.84%) Atlassian
11 1 (0.84%) Fortinet
11 1 (0.84%) IBM
11 1 (0.84%) Meraki
11 1 (0.84%) NetApp
11 1 (0.84%) SolarWinds