Network Engineer Customer Service

MAHMOOD JAFRI

**** ***** **. *, ********, Ontario – L6T 0G2 – Cell# /+1-647-***-**** @: ************@*****.*** + LinkedIn profile

IT/Telecom Network Engineer

An accomplished, result-oriented professional with multitasking abilities.

Over 14 years of experience as a mobile wireless network field engineer, working on various IT/Telecom upgrade projects across multiple North American markets. Recognized for strong organizational skills, effective written and oral communication, critical thinking, expertise in network upgrades, operations, and maintenance (O&M), troubleshooting, customer service, and personnel management training.

Education and Training

Network Engineer (A+, Microsoft 680,640,642/CCNA) Citi College, Toronto, Ontario 2015

Electronics Eng. Technologist in Communications, Centennial College, Toronto, Ontario 1996

Bachelor of Science D.J Science College, Karachi, Pakistan 1988

Microsoft/Cisco/Ericsson/Nokia/AT&T/Rogers/Osha & Whmis Certified Professional

•MCP, MCSE, Windows N.T. Server/N.T. Workstation 4.0 & Internet M.S TCP/IP 2000

•2,3,4 & 5G Ericsson Radio Base Station LTE 6000 series 2005-2011-2012-2018-2021

•OSHA 360 First aid/ R.F awareness (Safety)/ COMPTIA A+ 801/802 /CCNA 2015

•Nokia 4G LTE 005 Air Scale ICI USA/ Rooftop fall arrest/Fall Protection / STEP 2018

•Supplier awareness with Quality Installation for Technical Places (AT&T) 2019

•CCCS CompTIA CySA + Cybersecurity Analyst 2022

•Familiar with getting exposure to Big data, Python, Perl, Microsoft CRM & SQL

Functional Expertise

•Tested and troubleshooted the TTC data communication system for the TTC YUS CBTC Line 1 project.

•Extensive experience with Amps/TDMA/GSM 2G, UMTS/WCDMA/EVDO 2000, 3GPP, 3G, 4G LTE, and 5G NR mobile wireless radio access networks (RAN) through all stages of construction, installation, commissioning, integration, upgrading, operations/maintenance (O&M), troubleshooting, RF data testing, VoIP, and system improvements. Familiar with tools like Remedy and EMAS for networks such as Ericsson (AT&T, Verizon, T-Mobile, Rogers), Huawei (Telus), Nortel, Lucent (AT&T, Bell), Samsung (Sprint), and Nokia (Freedom Mobile) in the Greater Toronto Area.

•Performed 1023 inspections for the 2017–2018 Roger’s uplift project, ensuring installation compliance with Rogers 4000, 4006, and 4008 standards.

•Monitored performance and troubleshot issues in OSS, BSC, RNC, SGSN, GGSN, MME, PGW, and SGW.

•In-depth knowledge of 4G/5G call flows from a packet core and IMS perspective.

•Provided technical support for LTE/RAN/RNC/MSC/BSC eNode B networks, defect fixing to enhance network performance using Citrix, Netscaler, Ericsson Network Manager in OSS, Element Manager, Moshell, etc.

•Monitored KPIs for RF Engineering, Wi-Fi, TEMS, DAS, VoIP call and data drive testing using the Ericsson SRC application.

•Installed, configured, and maintained various IT and telecom equipment, including Ciena 3916 media converters, Cisco and Juniper routers, ADSL modems, POS systems, and TYCO home and commercial security alarm systems.

•Hands-on experience with testing tools such as Time Domain Reflectometer (Exfo FTB 200), Algon, Oscilloscope, Site Master (Anritsu), Spectrum Analyzer, PCM meter/tester, Wattmeter, Wireshark, and QXDM for optical, Ethernet, and multiservice testing.

•Provided 24/7 troubleshooting and quality assurance support for IT/Telecom network upgrades across 3G, 4G, and 5G core networks, security alarm systems, Unix/Linux systems, and JavaScript-based applications.

•Theoretical and practical knowledge of LAN/WAN, IP addressing with subnetting, and expertise with Cisco routers, hubs, bridges, Cable TV, and network equipment, including IP routing protocols such as RIP, OSPF, IGRP, EIGRP, and BGP.

•Strong analytical and debugging skills in troubleshooting 4G/5G core networks. Troubleshooting and quality assurance with analytical skills to improve IT/Telecom 3,4 & 5G core networks upgrade twenty-four*seven on call for network outage issues, Security alarm system, Run Unix / Linux / java script etc.

Soft Skills

•Strong analytical and troubleshooting abilities.

•Excellent verbal and written communication skills

•Positive and adaptable attitude

•Effective personal time management skills

•Team player with a self-starter mindset

PROFESSIONAL EXPERIENCE

Signaling Test Specialist UPA System One for ALSTOM client TTC in GTA, Ontario July2023-July2024

•Tested and troubleshot the TTC data communication system for the Alstom TTC YUS CBTC Line 1 project, with emphasis on backbone testing, commissioning, configuration, and validation. Conducted antenna and TRE commissioning, reflectometry, and radio coverage assessments, performing end-to-end tests to ensure system reliability and performance.

•Ensured reliable wired communications between all trackside locations (stations, radio access points, and the Operating Control Center - TCC), incorporating redundancy through TCC-B to maintain operations if TCC becomes unavailable. Demonstrated strong time management skills in handling critical tasks efficiently.

•Managed wireless communications between trackside radio access points and train radio modems, ensuring continuous radio coverage across the track, including in tunnels, stations, and yard transfer tracks, leveraging free-space propagation techniques for optimal signal coverage.

Network Field Engineer Ericsson,Rogers & Freedom mobile in Ontario Oct2021- Jun2023

•Supported Ericsson in the Rogers Goldmine project, working with the latest 5G baseband 6648 and Cisco 6675 router.

•Managed the installation, commissioning, IP RAN connectivity, testing, and cutover of Cisco NCS 540 routers.

•Conducted RF VoLTE and LTE field signal testing to ensure expected performance.

•Handled wireless field operations and maintenance for Freedom Mobile’s Nokia 3G, 4G, and 5G cellular networks, resolving network outages across the GTA cluster Conducted RF VoLTE and LTE field signal testing to ensure expected performance.

IT Support Specialist IBM for Bombardier Toronto, Ontario (contract) Jan-Sep2021

•Responded to user requests in the IBM ticketing system (Service Desk Plus) for assistance with software, hardware, applications, and network connectivity issues, and documented resolutions.

•Assisted users with data transfer and troubleshooting software, hardware, and proprietary application issues using SCCM.

•Conducted computer diagnostics to investigate and resolve technical problems.

•Updated and reconciled asset inventory, retired, and disposed of obsolete assets in compliance with company policies.

Network Engineer Fusion Solutions (Ericsson 4/5G net upgrade for AT&T in Buffalo, N.Y) Sep2019-Nov2020

•Reconfigured Ericsson's 6630 hardware baseband V2 for AT&T's existing LTE mobile wireless network in the

New York market.

•Performed RF data field testing using the latest SRS application to verify expected data speeds and VoLTE performance, including Cell ID, PCI, and RSSI levels for Rogers LTE bands.

•Handled installation, commissioning, integration, testing, upgrades, and troubleshooting for AT&T’s 4G and 5G mobile wireless network equipment.

•Conducted site inspections to ensure compliance with AT&T installation standards for technical equipment and locations.

Network Technician Procom for Rogers Wireless Communications, Brampton, Ontario Mar2018-Jan2019

•Performed operations, maintenance, testing, and troubleshooting for 2G, 3G, and 4G LTE Rogers mobile wireless cell site network equipment.

•Conducted 1023 inspections for the 2017-18 uplift project, ensuring compliance with Rogers 4000, 4006, and 4008 standards.

•Repaired or replaced faulty cell site equipment after troubleshooting any issues.

•Upgraded Cisco routers for the 10G ring project and participated in hot cutovers.

•Participated in fiber link troubleshooting using OTDR for Ericsson RRU radios.

•Managed cell site power outages using portable DC generators for backup power.

•Performed E911 call testing across various LTE frequency bands to verify PCI assignments and location accuracy as per RF engineering requirements.

Network Field Engineer Wesbell Technologies, Mississauga, Ontario 2015-2017

•Reconfigured LTE 1900 MHz Ericsson R503/6630 hardware baseband V2 for the existing Rogers 700, 2100, and 2600 LTE mobile wireless networks in the Ontario market.

•Conducted RF data field tests using the latest SRS application to confirm expected Roger’s speed test results, VoLTE performance, including Cell IDs, PCI, and RSSI levels.

•Installed, tested, and upgraded Ciena 3914 media converters, as well as Cisco and Juniper routers for all streams.

•Troubleshot network equipment using Exfo Optical Time Domain Reflectometer for multiservice testing, along with a spectrum analyzer, Site Master (Anritsu), Ruby light meter, and OTDR meter for optical fiber cables.

IMP Engineer Samsung 3/4G core networks upgrade project in USA for Sprint (OH & MI states) 2013-2014

•Integrated, commissioned, tested, and troubleshot Samsung MMBS for 3G and 4G LTE Sprint wireless networks.

•Conducted legacy T1 cabling inspections and backhaul migration, including Cisco CSR insertion and verification. Managed the loading and upgrading of scripts in Cisco CSR ASR-901, CIMA cards for 3G, and UMA cards for 4G wireless Node B equipment.

•Saved time and resources by troubleshooting tower-mounted RRUs across multiple sites within a limited period.

Ericsson Field Engineer Radian/Prestige/Netricom, Mississauga, Ontario 2004/2006 2010/12-14

(Ontario, Alberta, Manitoba, N.Y & New Jersey)

•Responsible for the installation of 2G, 3G, and 4G mobile network projects in various markets across Canada and the USA, following Ericsson and client work orders, including testing, commissioning, integration, and troubleshooting.

•Dismantled and reconfigured AT&T mobile wireless networks in the California market while leading and training new employees.

•Managed the installation, commissioning, and integration of 3G UMTS equipment for AT&T in the Boston market.

•Reconfigured and added 3rd and 4th carrier frequency bands in UMTS for AT&T in the Chicago market.

•Installed, commissioned, and integrated 4G LTE Ericsson equipment for Verizon in Illinois and Michigan.

Cell site & RF Field Engineer Tek Systems Telecom, USA & Canada (Contract) 2000 – 2004

•Installed, commissioned, integrated, and upgraded Ericsson mobile wireless RBS 882 to 884 in multiple U.S. markets.

•Provided Ops & Maint for 32 AT&T mobile wireless network sites, available 24/7 for network outage issues.

•Conducted RF analysis and drive testing for Telus Mobility CDMA sites in the Toronto area to assess RF parameters for voice and data performance based on site location.

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