Network and Security Engineer

Thirruselvaa Ramanathan

*******@*****.***

BE, PCNSE, F5 CA, CCNP-V, CCNA-V, HP-MASE

https://www.linkedin.com/in/thirruselvaa-ramanathan-75688324/ Tel: +1-346-***-****

PROFESSIONAL SUMMARY

Having 15+ years’ experience in the field of Networking and to find a suitable position with an organization that will capitalize on my skills, experience in the field of Networking and dedication in return for career guidance, training, and motivation. A team player who also can work independently.

TECHNOLOGIES AND PRODUCTS

• Firewalls - Palo Alto Firewalls, Palo Alto Panorama, Cisco FTD, Fortigate Firewall, Infoblox DNS firewall

• VPN – IPsec (site-to-site, Remote access VPN), SSL VPN, Split Tunnel, DMVPN, Secure SDWAN.

• F5 - LTM, ASM, GTM, rSeries

• Cisco IP Telephony - Cisco Unified Communication Manager, Cisco CallManager Express, Cisco Unity Connection, Cisco Unified IM and Presence, Cisco Contact Center Express, Cisco Expressways, Cisco ISDN Gateways, Cisco WebEx on cloud, Video Endpoints, IP Phones, Prime Collaboration Deployment

• SSO - F5 APM

• Cloud – Azure, AWS

• Switches - Cisco Nexus switches, Cisco Catalyst switches, HP Procurve switches

• NAC - Cisco ACS, Cisco ISE and Windows NPS

• Routers - Cisco ISR Routers

• Wireless - Cisco WLC, Cisco Meraki, Aruba WLC

• General Protocol and concepts – TCP-IP, DNS, DHCP, HTTPs, IPSec, TLS, DNSSEC, PKI, NAT, VLAN, Port Security, Ether Channel, VPC, VTP, STP, HSRP, VRRP, SDWAN, LDAP, FTP, SNMP, DHCP, SAML, etc.,

• Routing Protocols - OPSF, BGP, EIGRP, RIP

• Monitoring – PRTG, Splunk

• Scripting – TCL, Python

WORK EXPERIENCE

Sr. Network and Security Engineer Jan 2025 – Till Date Caltek Solutions Inc.

End Client: ASML • San Diego, California

• Managing Fortigate Firewalls

• Managing Cisco FTD Firewalls

• Managing Cisco SDWAN

• Managing Cisco Network Devices which includes Nexus Switches, Catalyst Switches and WLC

• Managing F5 products which includes F5 Application Delivery Controller [LTM], Application Security Manager [ASM].

• Performing security gap Analysis in enterprise level network and security architecture and suggesting best security solutions to suite client requirement.

• Take necessary action on an emergency basis.

Sr. Network and Security Engineer July 2019 – Jan 2025 Emircom LLC • Abu Dhabi, UAE

Working as Sr. Network and Security Engineer involved in multiple projects which include deployment and maintenance of the customer’s network.

• Design and Implementing Palo Alto Security Products which include Palo Alto Firewalls, Panaroma.

• Design and Implementing F5 products which includes F5 Application Delivery Controller

[LTM], Application Security Manager [ASM].

• Design and Implementing Cisco Unified Communication products which includes Communication Manager, Unity Connection, Unified IM and Presence, Unified Contact Center Express, Communication Manager Express, Expressways, PRI/SIP Voice Gateways, Analog Voice Gateways, etc.,

• Design and implementation of Fortigate Firewalls, Cisco Firepower

• Managing Network devices such as Routers and Switches.

• Performing security gap Analysis in enterprise level network and security architecture and suggesting best security solutions to suite client requirement.

• Take necessary action on an emergency basis.

• Performing regular health checks on customer’s Network.

• Prepare the documentation like LLD, HLD, IP Address Scheme, and Network Diagram, Post Technical Documentation, Knowledge Transfer, etc., Network and Voice Professional Dec 2016 – June 2019 Department of Education and Knowledge • Abu Dhabi, UAE Was outsourced to the Abu Dhabi government (with roughly 20,000 users) entity “Department of Education and Knowledge” which was earlier called as “Abu Dhabi Education Council”. The role was Sr. Network Security and Security Professional in which I was taking care of the below things.

• Managing Palo Alto Firewalls in multiple locations

• Managing Infoblox DNS firewall

• Managing F5 products that includes LTM, APM, and ASM.

• Managing the end user devices securely using AAA devices [both Radius/TACACS+]

• Managing entire Cisco IP Telephony Platform

• Deployment and managing Cisco WebEx on premises.

• Maintaining the LAN/WAN part for the entire entity

• Managing Cisco Nexus Switches with VDC/VPC

• Managing Cisco Catalyst Switches with VSS along with other access switches

• Managing Aruba Wireless Controllers with dynamic VLANS

• Managing Cisco Wireless Controllers

Sr. Engineer Technical Support [Networking] Nov 2013 - Nov 2016 Intertec Systems LLC • Abu Dhabi, UAE

• Implement and configure Palo Alto Security Products, Cisco/HP Networks, Cisco Unified Communication products and Wireless products.

• Design and deploy Cisco ASA along with Cisco ASA-CX

• Design and Deploy Cisco Unified Communication Products such as Communication Manager, Communication Manager Express, Contact Center Express, etc.,

• Created and modified rules, diagnosed and resolve LAN/WAN problems.

• Take necessary action on an emergency basis.

• Performing regular health checks on customer’s Network.

• Give the training to Onsite Engineers and to the Customer about the Technology.

• Prepare documentation like LLD, HLD, IP Address Scheme, and Network Diagram, Post Technical Documentation, etc.,

Network Engineer Mar 2010 - Nov 2013

Alpha Data LLC • Dubai, UAE

• Implement and configure Cisco/HP Network and Cisco Unified Communication products.

• Design the Network as per customer requirement.

• Take necessary action on an emergency basis.

• Support onsite engineers for critical timings.

• Give the training to Onsite Engineers and to the Customer about the Technology.

• Prepare the documentation like LLD, IP Address Scheme, Network Diagram, post technical documentation etc.

• Performing preventive maintenance

Technical Support Representative Dec 2008 - Feb 2010 e4e Business Solutions

• Communicate via email with the customers experiencing difficulties relating to the installation and support of Symantec-Norton Antivirus products.

• Providing support to the end users relating to the latest virus definitions and computer issues

• Reproduce, diagnose, and resolve technical problems encountered by users.

• Also supported the customers relating to the technical support of a gaming company called Zynga.

EDUCATION

Electrical and Electronic Engineering Technologies/Technicians, Other Aug 2003 - Apr 2007 Anna University • Chennai

EDUCATION AND PROFESSIONAL CREDENTIALS

• Bachelor of Engineering [BE]

• Palo Alto Certified Network Security Engineer [PCNSE]

• F5 Certified Administrator [F5 CA]

• Cisco Certified Network Professional in Voice [CCNP Voice]

• Cisco Certified Network Associate [CCNA]

• HP Wired and Wireless Networks - BYOD

• Master ASE in HP Routing and Switching

MAJOR PROJECTS HANDLED

Abu Dhabi Department of Education and Knowledge [Earlier called as Abu Dhabi Education Council]-Managing around 20,000 + users and phones as Sr. Network Security and Voice professional. Focusing on providing services without leveraging security. Also, other projects include,

• Ministry of Foreign Affairs [MOFAIC] – Migrated Palo Alto Firewall from ASA firewall.

• Department of Finance [DOF] – Installed Palo Alto Firewalls along with Panorama

• Ministry of Finance [MOF] – Nearly 500 users, Cisco Nexus 7010 switches with VPC/VDC, Palo Alto Network Firewalls, Supported F5 LTM and AFM, Supported Cisco ACS, Cisco Catalyst Access switches, Cisco Unified Communication manager along with WebEx on premises.

• Musanada – Deployed Palo Alto Firewalls and Panorama in Azure Cloud.

• ADNOC Gasco – Nearly 14000 users, Deployed Cisco Communication Manager, IM and Presence Server, Unity Connection, Contact Center Express, Expressway, integrated with multiple vendors using SIP Trunk, Analog Voice Gateways.

• Dolphin Energy – Neraly 300 users with both CUCM and WebEx on Cloud

• General Secretariat of the Executive Council [GSEC]– Nearly 500 users, Supported F5 LTM and AFM, Supported Palo Alto Firewalls, Supporting Cisco Nexus switches, Upgraded Cisco CallManager, Unity Connection and Presence. Implemented Cisco Unified Contact Center Express.

• Ministry of Economy [MOE] – Managing Palo Alto firewalls, F5 LTM and F5 ASM in F5 rSeries

• ADNOC Schools – Deployed Palo Alto Firewalls, Implemented F5 LTM

• Bayanat – Deployed F5 LTM and F5 ASM in G42 Cloud

• Mayoor Private School – Nearly 2500 users, Cisco 4500 switches with VSS, Cisco ASA with failover, Cisco ASA, Cisco ASA-CX, Cisco IPS in ASA-CX, Cisco Meraki Access Points [Cloud based access points], Cisco 2960 edge switches.

• DWC [Dubai World Central - Airport] – Nearly 200 users, Cisco Routers, Cisco Nexus switch and Palo Alto firewalls in 2 locations and Cisco Wireless Controllers.

• JW Marriott Hotel, the World’s Tallest Hotel - Completed the switching for entire hotel using HP Procurve switches, which has around 1800 rooms.

• Life Line Hospital – Nearly 200 users, Cisco CallManager, Cisco VCS-E, Cisco VCS-C, Cisco WebEx on-premises, Cisco MCU, Cisco SX10 Endpoints, Cisco Jabber. Configured Mobile Remote Access in UAE for the first time for Cisco.

• Deloitte - Nearly 300 users, Cisco CallManager, Unity Express, H323 Gateway, and Cisco Core switches along with Cisco access points.

• Pharmalink – Nearly 60 users, Palo Alto firewalls, Cisco CallManager, Cisco Unity Connection, Cisco IM and Presence.

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