Systems Engineer II - Network Security

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The Infrastructure Engineering team design, develop, implement and operate all infrastructure used by Tesco Technology across our data centres, offices, stores and distribution centres. This encompasses multiple domains; private and public cloud, connectivity, end-user computing, CI/CD and monitoring toolkit. This includes both 3rd party and internally developed infrastructure applications and infrastructure that support the wider Tesco business.

As part of wider Infrastructure Team, Networks and Security Team design, develop, implement and operate all Network and Security infrastructure technologies that facilitate the both Infrastructure and the rest of Tesco Technology

Whilst specific responsibilities will be dependent upon the changing needs of the Tesco business, the following provides an overview of the role's key responsibilities and measures:

* Architect, Design and Deliver solutions using existing Infrastructure components. Where new infrastructure technologies are being introduced, implement them and establish best practice for their adoption. Resolve incidents that have not been seen before and initiate change to ensure that issues can be easily dealt with in future.

* Contribute to the Technology Roadmap for Tesco Technology Data Centres

* Evaluate new tools and techniques being able to understand their value and impact.

* Understand current application development techniques (12 factor app) and their implications to infrastructure

* Lead group design discussions on my area of expertise and be able to present with authority to a variety of audiences.

* Collaborate with Software Engineers to understand their requirements and assist them consuming Infrastructure in the most seamless way possible.

* Coach and mentor system engineers across Technology who are at a more junior level. Ensure that my own team's designs are of a high quality and understand the impacts to any other areas of infrastructure.

Skills / Experience Required

* Experience designing and deploying solutions for large, complex global organisations

* Analytical and structured approach to design, process and advanced trouble-shooting

* Understand Tesco Technology and business strategies and convert into technology roadmaps and innovative solutions that best achieve these goals

* Ability to produce and maintain high quality HLD/LLD and Standards documentation

* Well organised self-starter who takes personal ownership and accountability at required levels of the work stream and project life cycles; willing to go the extra mile at every opportunity

* Builds and maintains positive relationships within and across teams

* Provides technical leadership within teams and mentoring for individuals

* Communicates effectively, able to deliver and present both written and verbal, designs, strategies and concepts clearly and affectively to Senior & Jnr staff alike

* Take ownership, to keep up-to-date and embrace the latest industry technologies and associated supplier solutions like SDN and SDWAN

Required Technology Skills (Applicant should possess a min 3 of below)

* Deep technical knowledge of Firewalls Platforms and Technologies, including build/configuration of some of the following Palo Alto (pref) and Cisco ASA/FirePower (pref), also Checkpoint, Fortinet along with associated Management Systems and Firewall rule analysis tools eg Skybox, Tufin

* Advanced levels of VPN experience along with associated technologies and protocols eg IPSec, Public/Private Key Encryption, TLS/SSL, digital cert techniques like ISA/KMP GRE and DMVPN

* Excellent technical knowledge of OSI network topologies, troubleshooting and design eg Routing Protocols (BGP, OSPF, iGRP), DNS, DHCP, IP Address Management and TCP/UDP Port RFC & IEEE 802-based standards.

* High levels of experience of Threat prevention and detection techniques and associated technologies like IPS, IDS, APT/SEIM, Secure Proxy.

* High levels of knowledge of remote access and two factor authentication technologies and AAA solutions, eg RSA, Juniper/Pulse Cisco ACS, Radius

* High levels of Load balancing & Global/DNS balancing technologies and techniques preferably F5 hardware and/or software appliances, also Cisco ACE or Citrix Netscaler

* Good understanding of Internet/Web Technologies both hardware and cloud based, like CDN, Proxy/Caching, SSL Offloading/Interception, URL forwarding/re-direction from suppliers like Akamai, Bluecoat, Zscaler,

* Good understanding of browser-based technologies and protocols like HTML, HTTP/HTTPS and XML

* Good understanding of Network Management technologies and protocols like SNMP, Netflow, IPSLA, along with practical experience of associated Network Management & Alerting Tools

Desired Technical Skills

* Cisco/Arista switches deployed in Spine/Leaf topology

* Associated SDN/automation technologies/configuration tools like GIT, Chef, Anisble or Puppet, preferably in a DevOps environment

* Experience of Wide Area Networking technologies and protocols, such as MPLS, WAN Optimisation (Riverbed Steelhead or Cisco WAS), CoS, DWDM

* Latest 802.11-based WiFi standards and technologies with practical design and installation of provider solutions and tools eg Cisco, Aruba or Meraki and all associated survey techniques

* Scripting knowledge (eg Python, Unix/Linux or PowerShell & Batch)

* Familiarity with VMware NSX and wider VMware software stack (vCentre, vRealize)

To find out more information and to apply, please click the APPLY button.