Nisanka Mandara Email & Phone Number

Sri Lanka

Australia

• Conducted in-depth data & voice technical training sessions and knowledge transfer for the support engineers.• Mentored team members in advanced network troubleshooting techniques and best practices.• Ensured the entire network support operation achieved KPIs while managing the team.• Provided technical advice and guidance on escalations, complex issues, architecture design, and optimizations.• Ensured customer satisfaction through SLA adherence and continuous service improvement initiatives.• Prepared incident reports and RFO updates for customers, managing situations effectively.

Australia

• Configured and maintained network hardware and software components, including routers, switches, firewalls, and IPSec VPNs.• Designed and Implemented configurations for Cisco (IOS-XE, IOS-XR, 7200, 3500, ISR, ASR), Allied Telesis routers, and Juniper Firewalls (SRX300, SRX345 Series) for enterprise-grade data connections.• Performed network maintenance and equipment upgrades including service packs, patches, hot fixes, and security configurations.• Provided solutions engineering and configured link fail-over and active-backup setups (BGP, HSRP & VRRP) for critical network equipments to maintain high network availability and infrastructure improvements.• Executed troubleshooting, management, and implementation of WiFi wireless solutions utilizing Ubiquiti and Ruckus technologies.• Managed and secured the internal network infrastructure at the Colombo office.• Performed Microsoft 365 tasks, troubleshooting, and remote support for managed-services clients.• Maintained network documentation and internal Wiki, prepared network diagrams, configurations, and standard procedures.

Australia

• Configured and troubleshooted Draytek, NetComm, and Cisco Meraki for NBN PPPoE (FTTN, FTTC, FTTP, HFC) and 4G connections.• Monitored network performance, service alerts, and proactively identified and resolved issues within SLAs.• Collaborated with upstream service providers (Telstra, AAPT, Optus, Vocus etc) and stakeholders to ensure seamless integration.• Interacting with the IT teams of leading hotel groups including Accor, IHG, Marriott, Hyatt, Sheraton, Hilton, Mantra and EVT.• Checked, responded & resolved data, voice, and managed-services related helpdesk tickets in a timely manner.• Administered, configured and commissioned cloud & onsite corporate IP telephony solutions based on Asterisk/PBX. (SmartPABX).• Configured and troubleshooted SIP handsets and other VoIP endpoints (Cisco, Yealink, VTech, Mitel, Grandstream, Digium).• Configured Asterisk PABX features such as IVRs, DIDs, Queues, Schedulers, and troubleshooted voice-related issues.

Sri Lanka

• Implementation, configuring, proactive monitoring, and troubleshooting of Datacom services• Tracking and documenting all defects and incident resolutions in detail through a ticketing system• Support planning and execution of changes in production & deployment of new and changed features• Coordinating with local and global underlying carrier networks, customers and local/global technical teams• Deliver Tier-1 support to resolve issues related to IPLC, ILL, MPLS & DGE issues• Troubleshooting data services on L2/L3 VPN, Static & BGP routing, VPLS, IPsec and GRE • Providing support for data/voice services of global backbones such as SMW3, SMW4, SMW5 & BBG• Hands on operations and troubleshooting on Cisco routers, SDH/PDH Transmission multiplexers & Firewalls• Maintenance of Data Center, implementing, monitoring, troubleshooting of Data center related services.• Network benchmark testing for Ethernet, E1, Fiber Optics STM1-4 levels with BERT testers• Managing local IT system and maintaining of the computer services

Colombo, Western, Sri Lanka

• Develop and maintain local networks in ways that optimize performance• Installing and configuring Windows Servers• Ensuring security and privacy of networks and computer systems• Providing technical support across the company• Monitoring, Analysis and management of the performance of the network• Ensuring the restoration of faults within agreed time frames and to internal quality standards

Colombo

• 2G, 3G & 4G LTE network Analysis and Optimization• 3G & 4G network cluster testing• BTS & site surveying• 2G, 3G, 4G FDD & TDD Single Site Verification (SSV) for Ericsson™ & Huawei™ platforms• Analyzing & preparing reports for 4G FDD/TDD SSV projects.• Network quality testing in benchmark projects

Sri Lanka

• Projects & Rollout• Network Operations• CS Core Network & Switch• Intelligent Networks• Network Operations Center (NOC)

Beng(Hons) In Computer Networking, First Class Honors - Batch Top (Sri Lanka Section)

Hnde, Electronics & Telecommunication Engineering

Pgd In It, Computer And Information Sciences, General, Mbcs