Site Reliability Engineer at Yelp:

World renowned online review site with a well established record of pushing the barrier of open-source technologies.

Helped redefine sensu monitoring system to scale better across multiple datacenters

Contributing to ruby codebase of sensu monitoring system

Involved in design and implementation of PaaSta platform as service infrastructure based on Mesos

Senior System Administrator at Apptio:

Late stage startup SaaS provider based in Seattle. Working from the London office, senior member of the team that managed a large and ever growing Java/Tomcat/MySQL application stack. Involved in a period of huge growth for both the team and the company.

Redefined monitoring systems from ground up using open source technologies such as Sensu, Logstash and Graphite - reducing MTTR and vastly improving application availability

Involved in redefining operations platform, including containerization using OpenVZ based virtualisation technology - increasing performance and density by 70%

Involved in metrics and trending data architecture deployment using Graphite, StatsD and Diamond enabling developers to get true visibility on application and operational performance

Helped grow operations platform from 1 managed datacenter to 12 colo datacenters in 2.5 years

Integral in deploying new application platform to AWS building a platform for developers to deploy directly into production

EMEA point of contact involved in scrums and triage with developers in remote locations to define points of escalation and urgent issues

Defined configuration management strategy for Puppet and version control workflow from the ground up

System Administrator at GR Software & Research:

High frequency trading firm based in London. Administration of multi-site Windows architecture and user support using proven Windows technologies such as Active Directory and Microsoft Exchange as well as support for trading data feeds and trading applications. Use of perl, powershell and some python to aid in the automation and systems management

Deployment of VMware virtualization platform and related storage architecture to increase density and reduce costs

Deployment, upgrade and management of Microsoft Exchange email platform

Monitoring and architecture improvements to in house Perl based monitoring and system management stack

Unix Consultant at JP Morgan Chase:

Large financial institution. Administration and configuration of distributed financial compute cluster using recognised tools such as Puppet, Nagios and Cobbler.

Deployment of Puppet configuration management tool to increase deployment times and improve management of large scale OS fleet

Deployment of Nagios monitoring architecture to increase monitoring visibility

Deployment of custom chroot application sandboxing to reduce effects of application performance issues