John Sim Email & Phone Number

London, Gb

London, England, Gb

London, Uk, Gb

A senior customer facing role owning the entire low-level customer solution, providing technical leadership and assurance during the later stages of the pre-sales cycle, through to delivery.Key achievements in this role: Delivered the design enabling transformation from border security to a zero-trust model for a national infrastructure provider.

London, Uk, Gb

A senior customer facing role owning the entire pre-sales journey from concept pitch to high-level design. Key achievements in this role: Delivered £11m of business in various programmes including data centre security perimeter virtualisation, high-speed secure cloud gateway, security transformation to zero trust, Next generation LAN & numerous technology refresh projects in the WAN/LAN/Security space

London, Gb

Working in the insurance sector within customer pre-sales and service, Northern Europe. I was primarily responsible for service and service delivery for FTSE100 clients.

Miami, Florida, Us

Service Manager within the Finance & Professional services vertical, primarly tasked with a FTSE100 client. Responsible for all aspects of the live service and service relationship.

Miami, Florida, Us

High care delivery was an elite organisational unit responsible for the top 10% of customer accounts, delivering either an enhanced structured service wrap or a truly bespoke offering as required.I was responsible for the teams engaged in 3rd line support, project delivery & delivery assurance of managed customer networks and projects within high care delivery operations.

Responsible for customer network & compute systems 3rd line support, project delivery and customer integration within Managed Solutions, covering finance, government, utilities and media sectors.

Various roles, primarily managing a variety of teams engaged with the support, maintenance and project delivery of managed customer solutions and platforms

London, Gb

Systems Administrator primarily dealing with ISP back-end systems, from AAA though DNS to Xylans and just about everything in between. Maintaining and ensuring stellar uptime across multiple platforms including shared and dedicated hosting from provisioning systems to backups.Building and configuring servers on various flavours of Unix OS, from FreeBSD to Solaris.Maintaining DNS systems for millions of domains. Configuration and maintenance of SAN/NAS infrastructure. Shell scripting, perl and all the normal two and three letter tools that come with it.Experience with MySQL and Oracle databases, maintenance and configuration of dial-up infrastructure and equipment and in house developed enterprise systems built on anything from Apache to JES.Experience with high availability systems from RAID to Veritas Cluster Server as well as proprietary HA technologies from Sun, HP and others.Experience in systems and network design, specification, build, test and production support and troubleshooting.

Newcastle Upon Tyne, Tyne And Wear, Gb

Reflections had fairly complex IT requirements and needs, but were resourcing this from within the team of talented games programmers. I was hired primarily to take on all IT support functions and allow the team to focus on their primary objectives. With over 100 creative people the challenges were many and varied, from simple PC issues to networking and server support. During my time at reflections I upgraded and standardised the network, implemented asset tracking, reverse proxy and firewall, backup infrastructure and WAN link to move away from dial-up for email – you name it I did it. Supporting Windows PC’s, Silicon Graphics workstations and render-farms and all manner of software and hardware. My time at reflections only came to an end when I was presented with an opportunity to move to Demon internet in order to further my career, I was able to recommend a trusted and extremely capable replacement who took over and stayed with the company for many years.