CentOS Contracts in England

The following table provides summary statistics for contract job vacancies advertised in England with a requirement for CentOS skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited CentOS over the 3 months to 24 June 2017 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 / England
Location	3 months to 24 Jun 2017	Same period 2016	Same period 2015
Rank	272	351	401
Rank change year-on-year	+79	+50
Contract jobs citing CentOS	358	302	231
As % of all contract IT jobs advertised in England	0.84%	0.61%	0.45%
As % of the Operating Systems category	4.11%	2.68%	2.02%
Number of daily rates quoted	258	225	144
Median daily rate	£500	£465	£388
Median daily rate % change year-on-year	+7.52%	+20.00%
90% offered a daily rate of more than	£362	£325	£245
10% offered a daily rate of more than	£598	£560	£500
UK excluding London median daily rate	£460	£425	£375
% change year-on-year	+8.23%	+13.33%
Number of hourly rates quoted	6	2	0
Median hourly rate	£47.50	£55.00	-
Median hourly rate % change year-on-year	-13.63%	-
UK excluding London median hourly rate	£47.50	£55.00	-
% change year-on-year	-13.63%	-

CentOS is in the operating system skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in England with a requirement for operating system skills.

Contract Operating System Skills England
Contract job vacancies with a requirement for operating system skills	8704	11289	11412
As % of all contract IT job vacancies advertised in England	20.50%	22.87%	22.36%
Number of daily rates quoted	5419	7238	6743
Median daily rate	£413	£400	£363
Median daily rate % change year-on-year	+3.12%	+10.34%
90% offered a daily rate of more than	£175	£201	£175
10% offered a daily rate of more than	£563	£550	£525
UK excluding London median daily rate	£375	£363	£348
% change year-on-year	+3.44%	+4.31%
Number of hourly rates quoted	511	583	905
Median hourly rate	£16.50	£16.50	£17.00
Median hourly rate % change year-on-year	-	-2.94%
90% offered a hourly rate of more than	£11.00	£11.50	£11.00
10% offered a hourly rate of more than	£47.50	£42.00	£40.00
UK excluding London median hourly rate	£15.50	£17.00	£16.20
% change year-on-year	-8.82%	+4.93%

CentOS
Job Vacancy Trend in England

The job posting trend of jobs advertised in England citing CentOS as a proportion of all contract or permanent IT jobs with a match in the Operating Systems category.

CentOS
Contractor Daily Rate Trend in England

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

Contractor daily rate trend for CentOS in England

CentOS
Contractor Daily Rate Histogram in England

The daily rate distribution of IT jobs citing CentOS in England over the 3 months to 24 June 2017.

Contractor daily rate histogram for CentOS in England

CentOS
Contractor Hourly Rate Trend in England

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

Contractor hourly rate trend for CentOS in England

CentOS
Contract Job Locations in England

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing CentOS within the England region over the 3 months to 24 June 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location	Rank Change on Same Period Last Year	Matching Contract IT Job Ads	Median Daily Rate Last 3 Months	Median Daily Rate % Change on Same Period Last Year	Live Job Vacancies
London	+27	191	£515	+3.00%	33
South East	+60	83	£500	+17.64%	27
South West	+26	25	£425	-19.04%	14
West Midlands	+30	20	£460	+15.00%	2
North West	+20	16	£425	-	9
Yorkshire	+6	9	£404	-10.27%	7
East of England	-1	9	£450	+5.88%	10
East Midlands	-8	3	£425	+86.81%	3
North East	+61	1	-	-
CentOS UK

CentOS
Top 30 Co-occurring IT Skills in England

For the 6 months to 24 June 2017, 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 England region with a requirement for CentOS.

1	645 (100.00%)	Linux
2	358 (55.50%)	DevOps
3	297 (46.05%)	Red Hat
4	295 (45.74%)	Red Hat Enterprise Linux
5	291 (45.12%)	Python
6	273 (42.33%)	Puppet
7	250 (38.76%)	Ansible
8	247 (38.29%)	Bash Shell
9	243 (37.67%)	Amazon AWS
10	227 (35.19%)	Docker
11	213 (33.02%)	Java
11	213 (33.02%)	VMware
12	190 (29.46%)	Security Cleared
12	190 (29.46%)	Jenkins
13	186 (28.84%)	Git (software)

14	183 (28.37%)	Configuration Management
15	182 (28.22%)	Ubuntu
16	172 (26.67%)	SC Cleared
17	164 (25.43%)	Ruby
18	160 (24.81%)	Windows
19	133 (20.62%)	Agile Software Development
20	127 (19.69%)	VMware Infrastructure
21	116 (17.98%)	Perl
22	115 (17.83%)	DNS
23	114 (17.67%)	Terraform
24	113 (17.52%)	MySQL
25	108 (16.74%)	Opscode Chef
26	107 (16.59%)	Continuous Integration
27	96 (14.88%)	Elastic Stack
28	95 (14.73%)	Unix

CentOS
Co-occurring IT Skills in England 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
Applications
Business Applications
Cloud Services
Communications & Networking
Database & Business Intelligence
Development Applications
General
Job Titles
Libraries, Frameworks & Software Standards
Miscellaneous
Operating Systems
Processes & Methodologies
Programming Languages
Qualifications
Quality Assurance & Compliance
System Software
Systems Management
Vendors

Application Platforms
1	74 (11.47%)	Tomcat
2	73 (11.32%)	Confluence
3	72 (11.16%)	Apache
4	70 (10.85%)	Elasticsearch
5	50 (7.75%)	OpenStack
6	30 (4.65%)	nginx
7	16 (2.48%)	MS Exchange
8	14 (2.17%)	Jetty
9	11 (1.71%)	JBoss
10	10 (1.55%)	IIS
10	10 (1.55%)	SharePoint
11	8 (1.24%)	Apache Spark
11	8 (1.24%)	Exchange Server 2010
11	8 (1.24%)	SharePoint 2013
11	8 (1.24%)	WebSphere
11	8 (1.24%)	WildFly
12	6 (0.93%)	ArcGIS
12	6 (0.93%)	Exchange Server 2013
12	6 (0.93%)	SAS
12	6 (0.93%)	SharePoint 2010

Applications
1	9 (1.40%)	Microsoft Office
2	3 (0.47%)	Microsoft Excel
3	1 (0.16%)	HipChat
3	1 (0.16%)	MS Visio
3	1 (0.16%)	Stata

Business Applications
1	7 (1.09%)	SAP Oil and Gas

Cloud Services
1	243 (37.67%)	Amazon AWS
2	69 (10.70%)	Microsoft Azure
3	48 (7.44%)	AWS CloudFormation
4	34 (5.27%)	GitHub
5	29 (4.50%)	Amazon S3
5	29 (4.50%)	AWS Lambda
6	26 (4.03%)	Amazon EC2
7	22 (3.41%)	Amazon CloudWatch
8	18 (2.79%)	Virtual Private Cloud
9	16 (2.48%)	Amazon ELB
10	15 (2.33%)	Cloud Computing
11	13 (2.02%)	Office 365
12	12 (1.86%)	IaaS
13	11 (1.71%)	SaaS
14	7 (1.09%)	Route 53
15	6 (0.93%)	Akamai
15	6 (0.93%)	Datadog
16	5 (0.78%)	Google Cloud Platform
17	4 (0.62%)	Bluemix
17	4 (0.62%)	IBM Cloud

Communications & Networking
1	115 (17.83%)	DNS
2	79 (12.25%)	HTTP
3	78 (12.09%)	TCP/IP
4	75 (11.63%)	Firewall
4	75 (11.63%)	LDAP
5	48 (7.44%)	SSL
6	35 (5.43%)	SSH
7	32 (4.96%)	DHCP
8	31 (4.81%)	SAN
9	29 (4.50%)	VPN
10	26 (4.03%)	SMTP
11	21 (3.26%)	LAN
12	20 (3.10%)	OpenLDAP
12	20 (3.10%)	WAN
13	18 (2.79%)	Internet
14	17 (2.64%)	HTTPS
15	15 (2.33%)	Kerberos
15	15 (2.33%)	NAS
16	14 (2.17%)	Network Security
17	13 (2.02%)	OpenVPN

Database & Business Intelligence
1	113 (17.52%)	MySQL
2	91 (14.11%)	PostgreSQL
3	62 (9.61%)	MongoDB
4	53 (8.22%)	Hadoop
5	41 (6.36%)	NoSQL
6	39 (6.05%)	Apache Cassandra
6	39 (6.05%)	Big Data
7	35 (5.43%)	SQL Server
8	23 (3.57%)	Amazon DynamoDB
9	21 (3.26%)	Relational Database
10	17 (2.64%)	Apache Hive
11	16 (2.48%)	MariaDB
11	16 (2.48%)	Redis
12	15 (2.33%)	Amazon RDS
13	12 (1.86%)	SQL Server 2012
14	9 (1.40%)	Oracle Database
15	8 (1.24%)	SQL Server 2008
16	7 (1.09%)	GIS
16	7 (1.09%)	Impala
17	5 (0.78%)	DB2

Development Applications
1	190 (29.46%)	Jenkins
2	186 (28.84%)	Git (software)
3	81 (12.56%)	Maven
4	74 (11.47%)	JIRA
5	36 (5.58%)	Sonatype Nexus
5	36 (5.58%)	Vagrant
6	25 (3.88%)	Bitbucket
7	22 (3.41%)	Ant
7	22 (3.41%)	Team Foundation Server
8	19 (2.95%)	GitLab
8	19 (2.95%)	JUnit
9	16 (2.48%)	Subversion
10	14 (2.17%)	Gradle
10	14 (2.17%)	TeamCity
11	12 (1.86%)	Liquibase
11	12 (1.86%)	SonarQube
12	9 (1.40%)	Atlassian Bamboo
13	8 (1.24%)	Artifactory
13	8 (1.24%)	Selenium
14	7 (1.09%)	Hudson

General
1	43 (6.67%)	Finance
2	28 (4.34%)	Telecoms
3	17 (2.64%)	Law
4	7 (1.09%)	Electronics
4	7 (1.09%)	Manufacturing
4	7 (1.09%)	Marketing
5	6 (0.93%)	Banking
6	2 (0.31%)	Back Office
7	1 (0.16%)	Aerospace
7	1 (0.16%)	Games
7	1 (0.16%)	Investment Banking
7	1 (0.16%)	Pharmaceutical
7	1 (0.16%)	Retail

Job Titles
1	241 (37.36%)	DevOps Engineer
2	114 (17.67%)	Linux Engineer
3	107 (16.59%)	Administrator
4	95 (14.73%)	Linux/Unix DevOps
5	82 (12.71%)	AWS DevOps
6	79 (12.25%)	Linux Administrator
7	76 (11.78%)	Systems Administrator
8	72 (11.16%)	AWS Engineer
9	68 (10.54%)	Linux DevOps Engineer
10	67 (10.39%)	Linux Systems Administrator
11	66 (10.23%)	AWS DevOps Engineer
12	54 (8.37%)	Developer
13	43 (6.67%)	Consultant
14	37 (5.74%)	Senior DevOps
15	33 (5.12%)	DBA
16	31 (4.81%)	Systems Engineer
17	30 (4.65%)	Architect
18	28 (4.34%)	Senior DevOps Engineer
19	27 (4.19%)	DevOps Consultant
19	27 (4.19%)	Java Engineer

Libraries, Frameworks & Software Standards
1	96 (14.88%)	Elastic Stack
2	52 (8.06%)	Web Services
3	47 (7.29%)	Sensu
4	45 (6.98%)	REST
5	40 (6.20%)	LAMP
6	27 (4.19%)	Kafka
7	23 (3.57%)	ActiveMQ
7	23 (3.57%)	HTML
7	23 (3.57%)	XML
8	21 (3.26%)	MCollective
9	20 (3.10%)	CSS
9	20 (3.10%)	JSON
10	18 (2.79%)	XSLT
11	17 (2.64%)	RESTful
12	16 (2.48%)	RabbitMQ
12	16 (2.48%)	RSS
13	13 (2.02%)	PostGIS
13	13 (2.02%)	SOAP
14	12 (1.86%)	Hibernate
14	12 (1.86%)	Spring

Miscellaneous
1	45 (6.98%)	Linux Command Line
2	38 (5.89%)	Public Cloud
3	36 (5.58%)	Computer Science
4	32 (4.96%)	Data Centre
5	29 (4.50%)	Clustering
6	23 (3.57%)	Analytical Skills
7	22 (3.41%)	Greenfield Project
8	21 (3.26%)	PKI
9	18 (2.79%)	Replication
9	18 (2.79%)	Video on Demand
10	16 (2.48%)	Web 2.0
11	14 (2.17%)	Management Information System
12	12 (1.86%)	Private Cloud
13	8 (1.24%)	Enterprise Storage
14	6 (0.93%)	Derivative
14	6 (0.93%)	Spread Betting
15	5 (0.78%)	CMDB
15	5 (0.78%)	Device Driver
15	5 (0.78%)	EMC VNX
15	5 (0.78%)	RIA

Operating Systems
1	645 (100.00%)	Linux
2	295 (45.74%)	Red Hat Enterprise Linux
3	182 (28.22%)	Ubuntu
4	160 (24.81%)	Windows
5	95 (14.73%)	Unix
6	73 (11.32%)	Windows Server
7	46 (7.13%)	Debian
8	31 (4.81%)	Windows Server 2012
9	28 (4.34%)	SUSE
9	28 (4.34%)	Windows Server 2008
10	26 (4.03%)	Solaris
11	23 (3.57%)	Fedora
12	15 (2.33%)	Windows Server 2003
13	6 (0.93%)	Data ONTAP
13	6 (0.93%)	Oracle Linux
14	5 (0.78%)	AIX
15	3 (0.47%)	CoreOS
15	3 (0.47%)	Windows 10
15	3 (0.47%)	Windows 7
16	2 (0.31%)	Apple iOS

Processes & Methodologies
1	358 (55.50%)	DevOps
2	183 (28.37%)	Configuration Management
3	133 (20.62%)	Agile Software Development
4	107 (16.59%)	Continuous Integration
5	62 (9.61%)	ITIL
5	62 (9.61%)	Open Source
6	56 (8.68%)	Continuous Delivery
7	55 (8.53%)	Scrum
8	49 (7.60%)	Service Management
9	43 (6.67%)	Load Balancing
10	36 (5.58%)	OOP
11	35 (5.43%)	OO
12	34 (5.27%)	Test Automation
13	32 (4.96%)	Performance Tuning
14	30 (4.65%)	Analytics
14	30 (4.65%)	High Availability
14	30 (4.65%)	Migration
15	29 (4.50%)	Continuous Deployment
15	29 (4.50%)	Project Management
16	24 (3.72%)	Kanban

Programming Languages
1	291 (45.12%)	Python
2	247 (38.29%)	Bash Shell
3	213 (33.02%)	Java
4	164 (25.43%)	Ruby
5	116 (17.98%)	Perl
6	58 (8.99%)	PHP
7	49 (7.60%)	JavaScript
8	48 (7.44%)	SQL
9	46 (7.13%)	Shell Script
10	39 (6.05%)	C
11	29 (4.50%)	Groovy
12	28 (4.34%)	PowerShell
13	21 (3.26%)	C#
14	17 (2.64%)	Korn
15	16 (2.48%)	C++
16	11 (1.71%)	CQL
16	11 (1.71%)	Go
17	10 (1.55%)	AWK
18	7 (1.09%)	Bourne shell
18	7 (1.09%)	Dart

Qualifications
1	190 (29.46%)	Security Cleared
2	172 (26.67%)	SC Cleared
3	46 (7.13%)	Degree
4	20 (3.10%)	Cisco Certification
4	20 (3.10%)	RHCE
5	18 (2.79%)	RHCSA
6	17 (2.64%)	Computer Science Degree
7	16 (2.48%)	DV Cleared
8	12 (1.86%)	CCNP
8	12 (1.86%)	VMware Certified Professional (VCP)
9	11 (1.71%)	CCNA
9	11 (1.71%)	Microsoft Certification
10	8 (1.24%)	Master's Degree
11	7 (1.09%)	CESG Certified Professional
11	7 (1.09%)	CLAS
11	7 (1.09%)	OCA
11	7 (1.09%)	OCP
11	7 (1.09%)	Oracle Certification
12	6 (0.93%)	AWS Certification
12	6 (0.93%)	MCP

Quality Assurance & Compliance
1	11 (1.71%)	JSP 440
2	10 (1.55%)	Disclosure Scotland
2	10 (1.55%)	QA
3	7 (1.09%)	ISO/IEC 27001
4	4 (0.62%)	PCI DSS
5	3 (0.47%)	SLA
6	2 (0.31%)	PMO

System Software
1	227 (35.19%)	Docker
2	127 (19.69%)	VMware Infrastructure
3	73 (11.32%)	Virtual Machines
4	63 (9.77%)	Active Directory
5	45 (6.98%)	KVM
6	41 (6.36%)	Hyper-V
7	34 (5.27%)	VMware ESXi
8	29 (4.50%)	Xen
9	22 (3.41%)	Squid
10	19 (2.95%)	vCloud
11	16 (2.48%)	vSphere
12	12 (1.86%)	Apache ZooKeeper
13	11 (1.71%)	Postfix
14	9 (1.40%)	HDFS
14	9 (1.40%)	LXC
15	7 (1.09%)	GlusterFS
15	7 (1.09%)	iptables
15	7 (1.09%)	Veritas Cluster Server
16	6 (0.93%)	Samba
17	5 (0.78%)	NFS

Systems Management
1	273 (42.33%)	Puppet
2	250 (38.76%)	Ansible
3	114 (17.67%)	Terraform
4	108 (16.74%)	Opscode Chef
5	87 (13.49%)	Kubernetes
6	83 (12.87%)	Nagios
7	40 (6.20%)	logstash
8	37 (5.74%)	ZABBIX
9	34 (5.27%)	Kibana
10	32 (4.96%)	Graphite
11	27 (4.19%)	Packer
12	24 (3.72%)	SELinux
13	21 (3.26%)	yum
14	20 (3.10%)	Grafana
15	17 (2.64%)	Rancher
16	16 (2.48%)	NetBackup
16	16 (2.48%)	Red Hat Satellite
17	15 (2.33%)	Rsyslog
17	15 (2.33%)	vCenter Server
18	14 (2.17%)	Red Hat Spacewalk

Vendors
1	297 (46.05%)	Red Hat
2	213 (33.02%)	VMware
3	60 (9.30%)	Oracle
4	58 (8.99%)	Microsoft
5	42 (6.51%)	Cisco
5	42 (6.51%)	HP
6	31 (4.81%)	Splunk
7	25 (3.88%)	EMC
8	22 (3.41%)	AppDynamics
8	22 (3.41%)	Atlassian
9	19 (2.95%)	SaltStack
10	17 (2.64%)	NetApp
11	14 (2.17%)	Cloudera
12	13 (2.02%)	Citrix
12	13 (2.02%)	PagerDuty
12	13 (2.02%)	Symantec
13	12 (1.86%)	IBM
13	12 (1.86%)	Sonatype
14	11 (1.71%)	Juniper
14	11 (1.71%)	Sybase