Mayank Sehra
Senior Network Security Engineer Network Sme @Tata Consultancy Services
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WORK HISTORY
Senior Network Security Engineer Network Sme @Tata Consultancy Services
Crawley, GB
Serving as the Network SME and L3 escalation point for a large enterprise client, owning end-to-end network security across WAN/LAN, Aruba WLAN, and AWS hybrid environments- Lead L3 escalation for firewalls, VPNs, and datacentre connectivity, resolving complex incidents and reducing resolution time- Design secure, high-availability network solutions in collaboration with architects, vendors, and business stakeholders- Drive SD-WAN adoption and proxy/cloud security integrations across the enterprise- Produce design documents, topology diagrams, and SOPs to support operational excellence and audit readiness- Recognised as Network SME on a major transformation programme, ensuring performance, security, and compliance across mission-critical systems
EDUCATION
Guru Gobind Singh Indraprastha University
Bachelor of Computer Application, Computer Science
Lovely Public Sr. Sec. School
School
ABOUT MAYANK SEHRA
Senior Network & Security Engineer with 9+ years of experience designing, deploying, and securing enterprise-grade and hybrid cloud network infrastructures across mission-critical environments.Deep hands-on expertise in Palo Alto NGFW (SSL Decryption, App-ID, User-ID, Threat Prevention, URL Filtering), Cisco routing & switching, Aruba WLAN, IPSec VPNs, and AWS hybrid connectivity. Proven ability to act as the go-to Network SME and L3 escalation point - resolving complex firewall, VPN, and datacentre issues.Currently driving large-scale network transformation at Tata Consultancy Services for a major UK enterprise client, leading SD-WAN adoption, cloud security initiatives, and Panorama-managed firewall - all while maintaining zero unplanned downtime. What I bring to your team:Firewall policy design, audits & PAN-OS upgrades without service disruptionAWS & hybrid cloud connectivity (VPC, Direct Connect, IPSec tunnels)Network security compliance - ISO 27001, ITIL, GDPRClear documentation: topology diagrams, SOPs, design docsMentoring junior engineers and bridging technical and business stakeholders Based in Crawley, UK | Open to remote, hybrid, on-site, or relocation across the UK
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