Manish Kumar Kattimani
Sr Network Security Engineer
London
Summary
Experienced Sr. Network+Security Engineer with 16 years of expertise in LAN and WAN infrastructure planning and deployment. Skilled in task prioritization, project oversight, and effective communication. Detail-oriented with a strong background in network technologies and security. Focused on maintaining network security for safe data management. Resourceful Network Engineer with extensive on-site network management and support services experience. Develops and implements initiatives to foster corporate objectives. Proven history of providing supplemental and total management support for IT systems. Successful in establishing and maintaining networks and servers, with a strong aptitude for identifying solutions to solve client challenges. Flexible problem-solver with exceptional insight when troubleshooting routers, switches, and firewalls. Motivated employee with expertise in supporting the choice and purchase of hardware and software components. Accomplished Network Security Engineer who has worked with security vendors like Palo Alto, Checkpoint, Cisco ASA, and Fortigate firewalls. Strong verbal and written communication skills. Leads teams in configuring and programming switches, routers, and other complex network equipment. Works independently or as a team to achieve positive results.
Overview
19
19
years of professional experience
2017
2017
years of post-secondary education
7
7
Certifications
Work History
Security Operations Specialist
Warner Bros. Discovery
City Of London, City of London
11.2024 - Current
- Led end-to-end incident response processes for high-profile clients, ensuring rapid detection, containment, and remediation of security breaches, including DDoS attacks and web application exploits.
- Served as the primary point of contact for clients and internal teams during security incidents, providing clear, timely updates and strategic guidance to manage stakeholder expectations.
- Collaborated closely with Cloudflare’s security and performance services, including configuring and optimizing WAF rules, CDN settings, DNS configurations, and DDoS mitigation strategies to enhance client security posture.
- Supported the deployment of Cloudflare services, including setting up and configuring security rules, to optimize performance and security for enterprise clients.
- Monitored real-time traffic and security feeds, proactively identifying anomalies and potential threats during critical events such as racing seasons or live broadcasts, preventing breach escalation.
- Managed escalation workflows, liaising with engineering teams, legal, and executive stakeholders to coordinate incident containment and recovery efforts.
- Developed and refined incident response playbooks tailored to high-pressure environments, ensuring swift action during emergencies.
- Conducted post-incident reviews, delivering detailed reports and actionable recommendations to prevent future breaches.
- Supported implementation and tuning of breach prevention tools, including custom security feeds and automation scripts, to safeguard live events against emerging threats.
Senior Network Security Engineer
Warner Bros. Discovery
City Of London, City of London
10.2014 - 12.2024
- Supporting Network of 300+ Sites
- New site Builds, includes planning & making a Purchase order for the Appliances . Setting up the Network & Security appliances as per the Infosec standards .
- Firewall configuration & maintenance - involves day to day access requests , Troubleshooting issues & firmware upgrades .
- Leveraged Terraform to implement and enforce security policies and controls such as VPC configurations, security groups, and firewall rules, enhancing overall network security infrastructure.
- Spearheaded the deployment and administration of Palo Alto Networks firewall platforms including models PA-3420, PA-5450, PA-5260, and PA-7050, ensuring robust network security across diverse organizational infrastructures.
- Designed and implemented comprehensive security policies and procedures on Palo Alto firewalls, achieving optimized threat prevention and network efficiency in high-availability environments.
- Conducted regular system upgrades and patches for Palo Alto devices, maintaining up-to-date protection against emerging security threats and vulnerabilities.
- Led a team of junior network engineers in the configuration and maintenance of Palo Alto firewalls, fostering a collaborative environment and enhancing team proficiency with complex security solutions.
- Utilized Panorama management tool to centrally manage multiple Palo Alto firewalls, reducing administrative overhead and improving response times to security incidents.
- Engineered and executed detailed disaster recovery plans and fail-over mechanisms for critical network security systems, minimizing downtime and ensuring continuous network protection.
- SSL VPN Configuration - Initially managed Juniper Pulse as the User VPN solution . Later Globalprotect was rolled out , was responsible for migration from Juniper Pulse to Globalprotect.
- Optimized security configurations for routers, switches, and firewalls to improve overall system performance.
- Configured & setup Globalprotect Prisma Access .
- Established secure remote connectivity options for employees, enabling secure access while working remotely or traveling abroad.
- AMAZON WEB SERVICES Security Groups Configuration
- Streamlined incident response processes by creating comprehensive documentation and training materials for IT staff.
- VPC creation . VPC peering setup across the VPC's. VPN setup from the VPC's to on-prem Colo Firewalls.
- Was core engineer for Firewall Migrations which involved from Fortinet to Juniper , Juniper to Palo Alto , Fortinet to Palo Alto.
- Juniper IDS configuration & Troubleshooting
- Successfully Deployed automated network configuration changes for large Network appliance deployment in the new site builds.
- B2B VPN configuration
- DHCP & DNS configuration on Infoblox appliance.
- Involved in project for Major Company Merges .which involved standardizing the acquired companies infrastructure & Hardware platforms .
- Worked on two Major Olympic events on site , involved setting up temp office & connectivity back back to Major Colo's in geographically different locations.
- Working closely with InfoSec team to address critical Vulnerabilities & Standardizing the Crypto profiles & Security profiles on The Network appliances.
- Migrated AWS VPC & Security Group scripts created by JSON to Terraform.
- Major contribution on setting up Core Colo sites in UK & APAC region.
Network Engineer III
Santander Cards UK Limited
03.2012 - 09.2014
- Performing daily health checks for Network devices, Servers and Applications.
- Monitoring the Network performance.
- Troubleshooting day to day network issues and thus providing the 1st line of action.
- Decommissions, Relocation and installation of Network Devices and other IT equipment.
- Communicating with the senior network team and other teams to ensure that issues are resolved at the earliest.
- Develop work plans, migration plans, and conversion scripts needed to integrate proposed solutions.
- Routing related tasks included providing Cisco router configuration and change management, providing technical support for Cisco Router configurations and installation for Customer.
- Switching related task such as implementation of VLANs, VTP, Inter-VLAN routing and others.
- VPN management.
- Configuration of Switch ports for implementing process/project wise VLANs, Voice VLANs & Trunk configuration (ISL & IEEE 802.1Q).
- Ensuring that SLA's and OLA's of the services are met at all the times.
- Liaising with the Change management team to ensure successful implementation of Infrastructure change services.
- Coordinating with the Incident management team to ensure minimal service impact in case of a service outage.
- Documenting all the changes and incident tickets for RCA.
- Involved in De-commissioning, relocation and re-installation of IT equipment which involved CISCO Routers & Switches in a timely and efficient manner.
- Installation of Checkpoint in distributed environment.
Network Engineer II
CINTAS Document Management Division
06.2011 - 01.2012
- Involved in Monitoring Network Performance & troubleshoot.
- Configure install and maintain networking devices.
- Expert in configuration and troubleshooting complex Routing Protocols (EIGRP, OSPF, BGP).
- Worked in a team of 20 engineers and reporting to the Operations Manager.
- Analyzes complex network problems and coordinates resolutions.
- Develop work plans, migration plans, and conversion scripts needed to integrate proposed solutions.
- Routing related tasks included providing Cisco router configuration and change management, providing technical support for Cisco Router configurations and installation for Customer.
- Configuring IP RIPv2, EIGRP, OSPF and BGP.
- Deploying QOS for Network.
- Configuring routing policy for BGP.
- Switching related tasks included implementing VLANS.
- Configured TCP/IP setting on multiple computers to participate on the network.
- Involved in De-commissions, relocates and re-installs IT equipment which involved CISCO Routers & Switches in a timely and efficient manner.
IT Support Technician
Unilever
11.2009 - 01.2011
- Repaired, assemble, and maintain multiple computers including network support printing and Internet settings.
- Handing new system to clients.
- Installation of windows 2003/2008 server.
- Managing Active directory services.
- Implementing NTFS files, folder permission and sharing permission.
- Managed IT asset inventory efficiently, ensuring accurate tracking and timely replacement or upgrades as needed.
- Reduced support tickets through proactive maintenance of hardware, software, and systems.
- Trained end-users on best practices for system usage, increasing their productivity and confidence in utilizing technology tools.
IT Support Engineer
Alcatel Lucent
03.2006 - 09.2008
- General IT support and administrative duties.
- Installation & troubleshooting of the packages like MS-office 97/2000/XP/2007.
- Making Asset inventory reports.
- Upgraded and installed new software.
- Repaired and maintained hardware.
- Troubleshooting various network problems like port enabling, crimping.
- 24/7 monitoring of WAN networking .
- Installation, Managing & troubleshooting leased circuits & ISDN.
- Keep track of the configuration changes for all the routers and other WAN equipments.
- Provided general IT support.
- Installed, configured, tested and maintained operating systems, application software, and system management tools.
- Provided remote support to offsite users, ensuring minimal disruption during business travel or remote work scenarios.
Education
MSc - Computer Systems Engineering
University of East London
Bachelor of Science - Electronics and Communication Engineering
VISHWESHWARIAH TECHNOLOGICAL UNIVERSITY
04.2001 - 09.2006
Skills
Routing Protocols
EIGRP
BGP
OSPF
NAT
CISCO ROUTERS
CISCO SWITCHES
IPsec VPN's
Cisco ASA Firewalls
Palo Alto
Fortinet
Checkpoint Firewall
Juniper Firewall
JUNIPER SWITCHES
PALO ALTO FIREWALL
SSL VPN Appliances PULSE SECURE
SOLARWINDS
SEIM - Splunk Enterprise Security
INFOBLOX
RIVERBED
ARUBA CLEARPASS
AMAZON WEB SERVICES (AWS)
undefinedCertification
CCNA
Training
- Juniper AJER Training
- Juniper JUTM Training
- Juniper JSEC Training
- Palo Alto Networks: Firewall Improving Security Posture and Hardening PAN-OS Firewalls EDU-214
Accomplishments
- Collaborated with team of 100+ in the development of Paris Olympics Project.
- Achieved Stellar Award for the outstanding delivery of the Network Security Projects in year 2021
- Achieved Stellar Award for the outstanding delivery of the Network Security Projects in year 2022
- Achieved Stellar Award for the outstanding delivery of the Network Security Projects in year 2019
- Achieved Stellar Award for the outstanding delivery of the Network Security Projects in year 2020
- Achieved Stellar Award for the outstanding delivery of the Network Security Projects in year 2018
- Achieved Stellar Award for the outstanding delivery of the Network Security Projects in year 2017
- Achieved Stellar Award for the outstanding delivery of the Network Security Projects in year 2016
Timeline
Security Operations Specialist
Warner Bros. Discovery
11.2024 - Current
Senior Network Security Engineer
Warner Bros. Discovery
10.2014 - 12.2024
Network Engineer III
Santander Cards UK Limited
03.2012 - 09.2014
Network Engineer II
CINTAS Document Management Division
06.2011 - 01.2012
IT Support Technician
Unilever
11.2009 - 01.2011
IT Support Engineer
Alcatel Lucent
03.2006 - 09.2008
Bachelor of Science - Electronics and Communication Engineering
VISHWESHWARIAH TECHNOLOGICAL UNIVERSITY
04.2001 - 09.2006
MSc - Computer Systems Engineering
University of East London
Similar Profiles
Andrew GourdieAndrew Gourdie
Sport Presenter - Newshub Live at 6 at Newshub/Warner Bros Discovery/Warner Bros DiscoverySport Presenter - Newshub Live at 6 at Newshub/Warner Bros Discovery/Warner Bros Discovery
ERIN R. (ROSA) MOODYERIN R. (ROSA) MOODY
NA at Warner Bros. Discovery, Warner BrosNA at Warner Bros. Discovery, Warner Bros
KEDAR WANIKEDAR WANI
Sr VMWare VDI Engineer at Warner Bros Discovery [WarnerMedia/Time Warner]Sr VMWare VDI Engineer at Warner Bros Discovery [WarnerMedia/Time Warner]
Aracelis GonzalezAracelis Gonzalez
Director, Client Support at Warner Bros. DiscoveryDirector, Client Support at Warner Bros. Discovery
Keaun SolinasKeaun Solinas
Logistics Coordinator at Shop.com/Market United KingdomLogistics Coordinator at Shop.com/Market United Kingdom