Ranjith Kumar
Dubai,UAE
Summary
Bachelor Degree (IT) professional offering nearly 10+ Years of rich cross-cultural experience in all aspects of Network Implementation, Administration, commissioning, Security, Design & Architecture, Network Configuration, Installation, Upgradation & Migration, SLA & SOP Management, Procurement, Vendor Management.
Experience in designing and implementing Data Centers.
Expert level experience and knowledge with design and implementation of large enterprise Data Center, WAN, DMZ and Internet network segments. Document all network setups.
Rich experience in developing the test & commissioning procedures for ICT systems (Compute, Storage, Network, and security).
Strong exposure in configuring, installing and troubleshooting various network & security devices/services.
Rich experience in designing & preparing disaster recovery plans for the network and security devices, interfacing with vendors for network and security products, and managing configuration/ re-configuration of servers.
Overview
11
11
years of professional experience
Work history
Senior Network Security Engineer
Alpha Data PJSC
Dubai, UAE
09.2024 - Current
- Architect and implement end-to-end network and security solutions across enterprise environments, including Data Centers, branch offices, and cloud-integrated networks.
- Lead design and deployment of Cisco SDA (Software-Defined Access) solutions, including segmentation policies, fabric provisioning, and assurance monitoring via Cisco DNAC.
- Configure and maintain Cisco security platforms such as ASA, FTD (Firepower Threat Defense), ISE (Identity Services Engine), and ESA (Email Security Appliance) to enforce advanced threat protection and identity-based access control.
- Design and manage FortiGate and Palo Alto Networks firewall infrastructures, including HA clustering, VPN (IPSec/SSL), policy optimization, and UTM features
- Implement F5 BIG-IP LTM & GTM for application traffic optimization, global server load balancing, SSL offloading, and high availability.
- Integrate Cisco Prime Infrastructure for network performance monitoring, device inventory management, and automated configuration backups.
- Collaborate with pre-sales and delivery teams to translate customer requirements into technical designs (HLD/LLD), BOQ, and project scopes.
- Prepare and validate design documents including HLD, LLD, NIP, and NRFU aligned with business continuity, DR, and security frameworks.
- Conduct network health checks, security audits, and root cause analysis for complex issues, ensuring proactive incident prevention and SLA compliance
- Manage migrations and greenfield deployments involving core switch replacements, L3 VLAN transitions, VPN tunnels, and datacenter refreshes.
- Coordinate with multi-vendor support (Cisco TAC, Fortinet, Palo Alto, F5) for escalated troubleshooting and firmware upgrades.
Senior Network Security Specialist
Siemens Industrial LLC
Dubai, UAE
07.2023 - 08.2024
- Network Implementing for Network Devices, Security Devices and Wireless devices and preparing design & implementing of all kinds of Network related projects that involving Network and Security and Wireless Technology.
- Planning and Designing the Network. And working with presales team and sales team.
- Conducting the site survey and preparing the RFQ.
- Conduct meeting with Customer and collecting the existing network information and collecting the info customer expectation requirements.
- Preparing the HLD, LLD and project related documents.
- Implementing the Network devices cisco catalyst switches C9000, Nexus switches, Wireless controller and Access points and Security devices.
- Preparing the documentations of Network migrations and arrange the meeting with customer and finalizing the project scope.
- Conducting the Wireless site survey and reviewing the pre-survey wireless heat map report and designing the Access point placing and designing.
- Planning and implementing the Core swithes and Access switches, wireless controller, Access points.
- Implementing the multi-vendor firewalls cisco ASA, Firepower, Fortigate, Palo Alto.
- Conducting the Network PPM like as Access switch, Core switch, wireless controller, Firewall, ESA, ISE, SD Access.
Network Implementation Engineer
Site Technology ltd
Abu Dhabi, UAE
05.2021 - 06.2023
- Network Implementation Engineer for Network and Security and Wireless Technology and have design & implementation of all projects that involve Network and Security and Wireless Technology.
- Level 3 IP Network Technical Expertise, IP Networks Design, Deployment and Management for Wired and Wireless network/technologies such as: WAN and LAN connectivity, Multivendor Switches/Devices including Core, Firewalls, WLCs.
- Remote access solution implementation and support such as IPSEC VPN, Remote and Site to Site VPNs, FortiGate SD-WAN.
- Implementing the Firepower (FTD) and FMC and configuring the HA and Firewall policies.
- Expert to manage all three layers of traditional Network Model (Core, Distribution and Access) and document/change the design as per requirement.
- Able to identify and resolve issues remotely in time and if requires on-site visits to End-Users and different Branches/Sites to understand and fulfill the requirements.
- Responsible for developing High Level Design, Low Level Design Guidelines. System Implementation and Ready for Use Document for the Implementation Team and guide the Implementation Team through the implementation phase & closure.
- Handle Technical Escalations for critical accounts and validate the final escalation to Cisco Technical Assistance for P1 & P2 Cases.
- Perform Knowledge Transfer & Handover Sessions to customers and internal support team.
- Work closely with the Pre-Sales & Sales team and conduct presentations to strategic customers on advanced technologies.
- Involved and taking lead of Data center migration projects and completing Migrating DC projects without any fail.
- Maintain the Integrity and extend complete support towards the vision and the strategy of the Organization.
- Perform the role of Trusted Technology Advisor to Strategic Customers.
Network & Voice Engineer
Adearest
Dubai, UAE
09.2018 - 05.2021
- Implementing the network devices -Switches, Routers, Firewalls, and security devices, and Wireless based on the new site requirements.
- Creating Vlans and configuring assigning the ports as per the requirements, and configuring VTP, STP, PVSTP in the switches, and creating ether channel and ACL.
- Preparing the design for Data center migration.
- Configuring VPN site to site vpn and SSL VPN with multi-vendor.
- Upgrading the firmware for network devices with vendor recommended latest version.
- Create the policy rules in firewall as per the request from vendor and client side.
- Checking the logs and findings the security threats in firewall.
- Configuring the port security in the switch ports.
- Configuring CUCM, CUC and Voice gateway as per the network requirements.
- Configuring Jabber and creating jabber users based on the requirements.
- Configuring IP phones and creating partitions in CUCM.
Network Engineer
Pinnacle computers
Dubai
09.2016 - 12.2017
- Configured High end Cisco Switches and Routers like 1700,2600,3700,1900,2960,3550 - Back up and restored a Cisco router configuration using TFTP server.
- Back up a Cisco IOS to a TFTP server and Upgraded and restored a Cisco IOS from TFTP server.
- Troubleshoot Network core, distribution and access layer issues reported by clients.
- Installation and re-configuration of network equipment, servers and other online assets.
- Implementation & troubleshooting of LAN, WAN.
- Securing against physical and logical network intrusions for all company network & server assets.
Network Trainer & Consultant
Rolla Computers
Sharjah
05.2014 - 08.2016
- Managing Microsoft Windows Server 2012 as ADC, Server 2003 as DC and Windows 7/XP.
- Managing Virtual Servers using VMware.
- Managing Microsoft Exchange Server 2008 and NAS Devices.
- Configuring and managing Active Directory users, DHCP, DNS and domain group policies.
- VPN Clients managing for 5 site offices.
- Configuring SonicWALL Firewall, Ethernet Switches, Routers, Access Points & Range Boosters.
- Implementing and managing CCTV Cameras and its web access.
- Data back up and scheduling for entire branches using Semantic Backup Exec and Acronis Backup.
- Managing and Troubleshooting of Multi-functional Printers, Plotters, Scanners and Fax Machines.
- Achieving maximum quality productivity with the lower costs.
- Plans the effective utilization of all resources (man, machine & money).
- Plans & Controls the business processes of procurement.
- Develops and recommends projects assessments and pricing strategies.
Skills
Level 3 IP Network Technical Expertise, IP Networks Design, Deployment and Management for Wired and Wireless network/technologies such as: WAN and LAN connectivity, Multivendor Switches/Devices including Core, Firewalls, WLCs,
-
Remote access solution implementation and support such as IPSEC VPN, Remote and Site to Site VPNs, FortiGate SD-WAN
-
Hands on Experience on Manageable Network Switches, Cisco and FortiGate Firewalls and Multivendor Wireless LAN Controllers including cisco and Ruckus, FortiAP, Huawei
-
Implementing the cisco Firewall, Fortigate, Palo Alto and other vendor
-
Creating the interface and configuring the routing
-
Performing network maintenance, monitoring, analysis, backup, inventory and system upgrades including patches, IOS, Firmware and security configurations of Switches/Routers/Firewalls
-
Expert to manage all three layers of traditional Network Model (Core, Distribution and Access) and document/change the design
as per requirement
-
Ability to work with Networking Product Vendors/ISP support teams to resolve issues within SLA
-
Effective Communication and Coordination with different teams/Department, End-Users and Support Desk team to Troubleshoot IT/Network-related Issues
-
Able to identify and resolve issues remotely in time and if requires on-site visits to End-Users and different Branches/Sites to understand and fulfill the requirements
-
Enterprise level Working Experience in Following Technologies: TCP/IP Model, Routing and Switching Protocols (Static/OSPF/BGP Routing Protocols, STP, Vlans, Ether channels, SVIs, Inter-Vlan Routing, VLTs, LAGs, FHRP, Internet/Network Redundancy), Security Profiles/Features (Internet Proxy, SSL Inspection, WAF, URL/Web filtration, Application Control, Intrusion Prevention System(IPS), VPNs IPSec Site to Site Tunnels, NAT, D-NAT, MPLS VPN, IP-SLA, - Wireless LAN Controllers, Access Points, Dot1x, IP Schemes/Subnetting and Distribution
- [Type] troubleshooting
Timeline
Senior Network Security Engineer
Alpha Data PJSC
09.2024 - Current
Senior Network Security Specialist
Siemens Industrial LLC
07.2023 - 08.2024
Network Implementation Engineer
Site Technology ltd
05.2021 - 06.2023
Network & Voice Engineer
Adearest
09.2018 - 05.2021
Network Engineer
Pinnacle computers
09.2016 - 12.2017
Network Trainer & Consultant
Rolla Computers
05.2014 - 08.2016
Similar Profiles
Ravikant P SabaleRavikant P Sabale
Sr. Project Engineer & Consultant (Network and Information Security) at Alpha Data LLCSr. Project Engineer & Consultant (Network and Information Security) at Alpha Data LLC
Zainul AbuddinZainul Abuddin
Network Engineer at Nestlé Middle East and North, Alpha Data RecruitmentNetwork Engineer at Nestlé Middle East and North, Alpha Data Recruitment
Shikha KhannaShikha Khanna
Service Support – Contact Center & Helpdesk at Alpha Data RecruitmentsService Support – Contact Center & Helpdesk at Alpha Data Recruitments
Sheshmani SharmaSheshmani Sharma
Area sales executive at Imperial Medcare Pvt.LtdArea sales executive at Imperial Medcare Pvt.Ltd
Kamil SplinterKamil Splinter
Operations Manager at Emirates Flight CateringOperations Manager at Emirates Flight Catering