Ajay Kumar Yadav
Kolkata
Summary
Cloud & Network Security Engineer with 4+ years of experience designing, implementing, and securing AWS cloud network architectures for enterprise environments. Currently working as an L3 engineer in an Architecture & Infrastructure Build team, delivering scalable, compliant, and secure solutions aligned with CIS benchmarks and AWS Foundational Security Best Practices. Strong expertise in AWS networking, Transit Gateway, VPNs, ALB, Fortinet Firewall, and FortiWeb WAF.
Overview
4
4
years of professional experience
1
1
Certification
Work History
Network Administrator / Cloud & Network Security Engineer
Tata Consultancy Services
12.2021 - Current
- Member of the L3 Architecture & Infrastructure Build Team, delivering cloud network and security solutions for multiple enterprise customers (4+ accounts).
- Designed, implemented, and managed AWS cloud networking including VPCs, subnets, routing tables, Transit Gateway, and endpoint services for production environments.
- Implemented Site-to-Site VPN and AWS Client VPN integrated with Microsoft Entra ID, enabling secure remote access for enterprise users.
- Deployed and managed Application Load Balancers (ALB) with ACM TLS certificates to ensure secure application connectivity.
- Implemented and operated Fortinet firewalls and FortiWeb WAF to protect internet-facing and internal applications.
- Managed security groups, routing policies, and firewall rules following least-privilege and zero-trust principles.
- Performed CSPM findings remediation based on CIS standards and AWS Foundational Security Best Practices.
- Collaborated with architecture, security, and application teams to deliver secure cloud network solutions across multiple customer environments.
- Used ServiceNow for incident, change, and problem management in production environments.
Education
B.Tech - Mechanical Engineering
Netaji Subhash Engineering College
Kolkata08-2020
Skills
Cloud & Networking
AWS VPC Subnets Route Tables Transit Gateway Application Load Balancer (ALB) AWS Client VPN Site-to-Site VPN
Security
Fortinet Firewall FortiWeb WAF Network Segmentation CSPM
Tools & Platforms
AWS Fortinet ServiceNow Terraform
Certification
- AWS Certified Advanced Networking – Specialty
- AWS Certified Solutions Architect – Associate
- AWS Certified Cloud Practitioner
- Fortinet Certified Associate in Cybersecurity
- HashiCorp Terraform Associate
Timeline
Network Administrator / Cloud & Network Security Engineer
Tata Consultancy Services
12.2021 - Current
B.Tech - Mechanical Engineering
Netaji Subhash Engineering College