SABUJ MISTRY
ASSISTANT MANAGER - CORE NETWORK & SYSTEM || ISP & IIG OPERATIONS
CAREER OBJECTIVE
Experienced Network Professional with extensive expertise in Core Network Administration, NOC operations, and Network Infrastructure Management. Specialized in Cisco, Juniper, Huawei, and MikroTik routing and switching solutions. Proven track record in managing large-scale network migrations, BGP configuration, MPLS implementation, and multi-vendor environments. Committed to continuous learning and delivering high-quality results for organizational success.
KEY PROJECT METRICS
300+
Core Routers Managed
Nationwide Core Network
38+
Huawei Migrations
Dhaka Metro Ring & DC-DR
7+ Years
ISP & NOC Operations
Multi-Vendor Infrastructure
WORK EXPERIENCE
JULY 2025 – PRESENT
Link3 Technologies Ltd.
Assistant Manager - NGNC || Core Network & System
Police Plaza Concord, Tower-1, Gulshan 1, Dhaka
- Huawei Router & switch migration all over Bangladesh.
- Service integration for Huawei Routers (NE8K-X4, NE8K-F1A-8H20Q) & Switches (S6730-H48X6C, S5731-S48T4X).
- Deploy Huawei Switch S6730-H48X6C on router mode.
- Manage Huawei device patch & version upgrades via iMaster NCE-IP to all connected BTS devices.
- Maintain Huawei device traffic policy & relevant security ACLs.
- Successfully completed Dhaka Metro Huawei device migration and established high-capacity ring network as per DC-DR planning.
- Managing Core Network Infrastructure with 300+ routers in the entire network, including 38+ Huawei router migrations in Dhaka Metro.
- Configuring Routers: Juniper MX-480, MX-10, MX-204, ACX-1000, ACX-4000 Series, Huawei NE8K-X4 series, NE8K-F1A series.
- Configuring BGP, PNI, Static routes, and Route Optimization as per client demands.
- Configuring BRAS logical configurations such as eBGP & OSPF.
- Configuring OSPF & load balancing between internal networks.
- Upstream bandwidth shaping, GGC & FNA nodes load balancing.
- Configuring Multi-vendor switches: CISCO, HUAWEI, NORTEL, VDX, REDSTONE.
- Configuring LACP & PAGP in switches.
- Configuring MPLS L2 & L3 data links as per client requirements.
- Service integration & BGP establishment with MIS ticketing system fault resolution.
- R&D on core & edge router redundant links and firewall security policy solutions.
JULY 2023 – JUNE 2025
Link3 Technologies Ltd.
Sr. Support Engineer - Core Network & System
- Executed nationwide Huawei router and switch migration tasks.
- Managed Core Network Infrastructure and multi-vendor router configurations.
- Handled enterprise service integration and core network troubleshooting.
JUNE 2022 – AUG 2023
Radiance Technology
System Engineer - Core Network & System
Sheikh Hasina Software Technology Park, MTB (Level -8), Jashore / Dhaka
- Led team management and overall system administration.
- Configured core networks, routers, switches, and OLT devices.
- Maintained enterprise monitoring servers: Cacti, Nagios, FTP, and Asterisk PBX.
- Trouble ticket handling, fault resolution, link provisioning, and analytical reporting.
SEPT 2020 – FEB 2022
DigiCon Telecommunication Limited
Assistant Engineer - Core Network
18th Floor, Awal Center, Banani, Dhaka -1213
- Configured and managed OSPF, BGP, and MPLS routing protocols across multi-vendor routers & switches (Juniper, Cisco, Huawei, MikroTik).
- Monitored upstream QoS & routing optimization for maximum performance.
- IP planning, management, customer installation, data link troubleshooting, and VLAN/STP/RSTP switching.
- Network monitoring via MRTG, SolarWinds, Nagios, Observium, SmokePing, and FastNetMon.
SEPT 2018 – AUG 2020
Weblink Communications LTD.
Jr. Executive - ISP Operation
House -101 (6th Floor), Road -13/A, Block -C, Banani, Dhaka -1213
- Link implementation, provisioning, and reseller link troubleshooting.
- Wired/Wireless LAN configuration and remote corporate customer support.
- Network monitoring using MRTG & WhatsUp Gold; NTTN site survey report collection.
TRAINING & CERTIFICATIONS
Juniper Networks Certified Associate (JNCIA-Junos) | Oct 15, 2021
Huawei NCE Administration & NetEngine Router O&M | Huawei Technologies | ID: 23EFDBDSIC051009
CCNA | BUET (Bangladesh University of Engineering & Technology) | 2017 – 2018
RHCSA & RHCE in RHEL7 | CSL, Dhaka | 2019
MikroTik Certification | Daffodil Online LTD, Dhaka | 2017
Enterprise Network Monitoring & Management | CSL, Dhaka | 2021