11/10/2026 updated

SP
100 % available

Senior Network & Security Architect | Zscaler ZIA/ZPA | Zero Trust & SASE

Aylesbury, United Kingdom
Worldwide
BS Mechanical Engineering; Certificate in Computer Science, University of Wisconsin-Madison
Aylesbury, United Kingdom
Worldwide
BS Mechanical Engineering; Certificate in Computer Science, University of Wisconsin-Madison

Profile attachments

Sarath Palety - Network Design Authority - CV.pdf

Network ArchitectureRoutingNetwork SegmentationSolution ArchitectureCisco
Network and Connectivity Architecture
Extensive expertise in designing complex enterprise network infrastructure across LAN, WAN, Wi-Fi, datacentre and backend environments, including network segmentation, resilience and connectivity architecture for public and private sector organisations.

Technical Design Authority (TDA)
Proven Technical Design Authority and design assurance experience, reviewing and challenging technical solutions, identifying risks and dependencies, establishing architectural standards and ensuring designs meet business, technical and operational requirements.

IT/OT and Security Infrastructure
Deep knowledge of IT/OT environments, CCTV, physical access-control systems and security infrastructure, including the design and implementation of secure, segmented and standardised connectivity solutions across enterprise and operational technology environments.

High-Level and Low-Level Design (HLD/LLD)
Production of architectural blueprints, High-Level Designs and Low-Level Designs, translating business and operational requirements into detailed technical design specifications and infrastructure transformation roadmaps.

SD-WAN and Wi-Fi Architecture
Development of architectural blueprints for enterprise Wi-Fi and SD-WAN solutions, including Cisco Viptela SD-WAN, Aruba and Aerohive Wi-Fi, standardising connectivity across geographically distributed organisations.

Cloud and Data Centre Connectivity
Support for the consolidation of physical data centres and migration of services to AWS and Azure, defining network connectivity, DNS, routing and security requirements for transformed infrastructure.

Stakeholder Engagement and Multidisciplinary Design Coordination
Strong track record of working with customers, architects, engineering teams, consultants and third-party delivery partners to maintain technical alignment throughout complex infrastructure programmes.

Technical Governance and Change Management
Experience in technical governance, change management, procurement and supplier management, including developing business cases, evaluating technical solutions, coordinating implementation and supporting knowledge transfer and operational transition.

Requirements Capture and Analysis
Experienced in requirements capture, analysis and translation into technical designs, engaging business, technical and scientific stakeholders to document use cases and translate operational needs into network architecture and technical design specifications.

Certifications: CCNA, CCNP, PRINCE2, ITIL, Zscaler ZDTA/ZDTE/ZDDC
Holder of industry-recognised certifications including CCNA, CCNP, PRINCE2 Practitioner, ITIL Foundation and Zscaler ZDTA/ZDTE/ZDDC, supporting technical and project management excellence.

Experience

Professional experience10+ years
Freelancer since2010

Languages

EnglishFluent

Project history

Director

Salmiya Ltd.
Providing network, connectivity and infrastructure architecture consultancy to organisations across the public and private sectors. Engagements involve defining technical strategies, capturing business and infrastructure requirements, developing and assuring network designs, and providing technical governance across complex transformation programmes.

Network Transformation Engineer

Knauf
Assessed and modernised LAN, WAN and IT/OT connectivity across operational manufacturing sites, developing repeatable designs for resilient, secure and standardised infrastructure. Responsibilities included network infrastructure assessment, network architecture and design using Cisco Catalyst 9500/9300 and Fortinet firewalls, IT/OT connectivity and segmentation, infrastructure standardisation and technical implementation and integration.

Wi-Fi and SD-WAN Consultant

Eurofins
Developed the architectural blueprint for standardising Wi-Fi and SD-WAN across a geographically distributed organisation with multiple acquired businesses and differing local infrastructure. Responsibilities included connectivity architecture, design coordination, standards and procurement, and implementation roadmap definition.

Network Transformation Architect

Science and Technology Facilities Council (STFC)
Led the architecture of a major LAN, WAN, Wi-Fi and data-centre network transformation across a complex scientific research environment, delivering a resilient and standardised connectivity model supporting national and international collaboration. Responsibilities included requirements capture, network and Wi-Fi architecture, design assurance and governance, stakeholder coordination and infrastructure standardisation.

Network and Security Architect

Adur and Worthing District Council
Defined the target network and security architecture for a district-council transformation programme, covering enterprise connectivity, public Wi-Fi, CCTV and managed network services. Responsibilities included network infrastructure architecture, Wi-Fi infrastructure design, CCTV and security infrastructure, requirements and design coordination, and procurement and technical governance.

Head of Networks and Infrastructure

Fintech Payment Services
Responsible for the architecture, design and delivery of network, hosting and security infrastructure supporting a cloud-based payment services platform, reporting directly to the CTO. Responsibilities included network and infrastructure architecture, physical security and access control, and technical governance and supplier management ensuring compliance with ISO 27001, PCI-DSS and PCI-PIN.

Network and Security Product Owner

UK Government Department (BEIS)
Led the network and connectivity infrastructure transformation for a UK Government department, with technical and commercial responsibility for the design, delivery and operation of enterprise LAN, WAN, Wi-Fi, data-centre connectivity and associated network services. Responsibilities included network infrastructure architecture, requirements capture and design coordination, technical design authority, data centre and backend connectivity, supplier and stakeholder coordination, and infrastructure delivery and service transition.

Network Design Authority

Hutchison 3G UK (Three)
Responsible for network architecture and technical design across major telecommunications infrastructure programmes, covering mobile packet core, radio access networks (RAN), MPLS backbone and enterprise connectivity. Responsibilities included network architecture and design for Three Ireland, technical design governance, and infrastructure transformation including network insourcing, RAN modernisation, LTE rollout and virtualised infrastructure using VMware and Cisco ACI.

Technical Design Authority

T-Systems
Provided technical design authority for enterprise network infrastructure programmes, overseeing network architectures, technical designs and multidisciplinary engineering teams. Led network design activities for major enterprise clients including BP's global office voice infrastructure and Centrica's data-centre transformation.

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