Sreeraj KS
Network And Security Operations
Kochi,Kerala
Summary
Cybersecurity Engineer with extensive experience in Network Security, Firewall Technologies, Zscaler Security Service Edge (SSE), and Zero Trust architecture. Adept at providing cybersecurity support to global users and stakeholders across multiple regions and time zones, collaborating with cross-functional teams to ensure secure, reliable, and resilient business operations. Proven expertise in the design, implementation, and lifecycle management of cybersecurity solutions, including Zscaler Internet Access (ZIA) and Zscaler Private Access (ZPA),. Experienced in customer-facing cybersecurity support, security policy development, technology upgrades, and infrastructure security improvements. Strong background in implementing Zero Trust principles to secure users, applications, and data across hybrid and cloud environments.
Overview
3
3
Languages
4
4
Certificates
14
14
years of professional experience
Work History
Supervising Associate - STS Operations
Ey Gds
02.2014 - Current
- Manage and support enterprise security platforms including Check Point and Fortinet firewalls.
- Perform advanced troubleshooting for network connectivity, routing, application performance, and security-related incidents.
- Analyze and resolve complex network issues involving BGP routing, asymmetric routing, anti-spoofing, NAT, and policy enforcement.
- Investigate and coordinate resolution of WAN, Cloud Edge, Azure, and data center network incidents.
- Review firewall logs, packet flows, routing tables, and security events to identify root causes and recommend corrective actions.
- Implement and maintain firewall security policies, NAT rules, VPN configurations, and access control requirements.
- Coordinate with network, cloud, application, and infrastructure teams across multiple regions to resolve business-critical incidents.
- Support change management activities including firewall changes, routing updates, and security policy modifications.
- Monitor network performance and recommend improvements to enhance availability, security, and user experience.
- Prepare technical documentation, incident reports, work notes, and operational handover communications.
- Participate in major incident management, escalation handling, and root cause investigations.
Associate
Ey Gds
02.2014 - 08.2016
- L1 Network Operations support for MENA and India regions, ensuring timely incident resolution and SLA compliance.
- Monitor network health and performance using SolarWinds Orion and respond to alerts proactively.
- Manage network incidents, troubleshooting, escalation, and stakeholder communications.
- Coordinate with ISP vendors for connectivity, outage resolution, and service delivery across MENA and India sites.
- Administer and support EY Hotspot guest Wi-Fi services, ensuring reliable and secure guest access.
System Admin - Trainee
Alamy Images
02.2013 - 01.2014
- Administered Windows servers, VMware virtual machines, and enterprise backup solutions.
- Monitored and maintained network and server infrastructure, responding to operational alerts and incidents.
- Provided L1/L2 technical support for network, desktop, and server-related issues within SLA targets.
- Managed load balancing, system releases, and infrastructure operations across India and UK environments.
Education
Bachelor of Technology - Computer Science
Government Engineering College
Waynad 04.2001 -
Skills
Check Point, Fortinet, Network Security, Zscaler, Firewall Administration, BGP, Azure Networking, Hybrid Cloud, WAN Edge, Cloud Edge, Incident Management, Root Cause Analysis, Anti-Spoof ing, Asymmetric Routing, VPN, NAT, Routing & Switching, ServiceNow, Linux, TCP/IP, Infrastructure Operations, Technical Troubleshooting, Enterprise Networking, Security Operations, Change Management
Certification
GIAC Security Essentials Certification (GSEC)
Timeline
GIAC Security Essentials Certification (GSEC)
11-2029
Zscaler Digital Transformation Administrator (ZDTA)
05-2026
Vanderbilt University Agentic AI and AI Agents
12-2025
AI Agents: From Prompts to Multi-Agent Systems
12-2025
Supervising Associate - STS Operations
Ey Gds
02.2014 - Current
Associate
Ey Gds
02.2014 - 08.2016
System Admin - Trainee
Alamy Images
02.2013 - 01.2014
Bachelor of Technology - Computer Science
Government Engineering College
04.2001 -