Sharowar Jahan
Southport,QLD
Summary
Experienced IT/Network/System/Infrastructure professional with over 11 years of expertise in system engineering. Demonstrated proficiency in various domains including IT, cybersecurity, networking, cloud, and DevOps. Skilled in hardware management, network administration, system administration, and business administration, with a strong focus on security solutions. Committed to contributing significantly to organizational success within both individual and team environments.
Overview
16
16
years of professional experience
1
1
Certification
Work History
Senior Engineer (Network and Systems)
Creative Technologies Australia
02.2023 - Current
- Design, implement, and maintain enterprise-level network infrastructure, including LAN, WAN, and WLAN technologies, to ensure reliable and secure connectivity.
- Enhanced security measures with the implementation of firewalls, intrusion detection systems, and vulnerability assessments.
- Collaborate with cross-functional teams to design and implement network security solutions, including firewalls, intrusion detection systems, and VPNs, to protect against cyber threats.
- Configure and manage network devices, such as routers, switches, and access points, using industry-standard protocols and best practices.
- Implement and maintain network monitoring and management tools to proactively monitor network health, identify potential issues, and ensure timely resolution.
- Provide technical support and troubleshooting assistance to end-users, resolving network-related issues and inquiries in a timely and efficient manner.
- Collaborated with cross-functional teams to develop and implement data backup and disaster recovery strategies, ensuring business continuity.
- Checked rigorous application of information security policies, principles and practices for continuous delivery of network services.
- Design, implement, and manage cloud-based infrastructure solutions, leveraging platforms such as AWS, Azure, or Google Cloud Platform (GCP).
- Develop and maintain CI/CD pipelines to automate the deployment, testing, and delivery of software applications.
- Implement and manage containerization technologies such as Docker and orchestration tools like Kubernetes for scalable and resilient application deployments.
- Configure and manage infrastructure as code using tools such as Terraform, Ansible, or CloudFormation to ensure consistency and reliability across environments.
- Stay up-to-date with emerging cloud technologies and DevOps practices, evaluating and recommending new tools and technologies to improve efficiency and productivity.
Network and Systems Engineer
Enigma Cybernauts Pty Ltd.
06.2019 - 01.2023
- Contributed to company growth by supporting IT infrastructure expansion projects in response to increasing demand for services.
- Acted as a liaison between IT departments and business stakeholders, ensuring effective communication of requirements and expectations during project planning phases.
- Improved network performance by designing and implementing system upgrades, including hardware and software updates.
- Championed the adoption of best practices in change management processes to minimize disruption during significant system upgrades or migrations.
- Maintained up-to-date documentation of network topology, equipment inventory, configurations, and troubleshooting guides for easy reference during problem resolution efforts.
- Monitored network capacity and performance to diagnose and resolve complex network problems.
- Created VPN infrastructure and allowed for secure remote connections.
- Installed, supported and maintained company hardware and software infrastructure according to best practices.
- Maintained company servers, computers, printers, cables and other equipment.
- Checked rigorous application of information security policies, principles and practices for continuous delivery of network services.
- Analyzed, troubleshot and enhanced network performance to drive efficiency.
Chief Technology Officer
Rasa Technologies (IT, Networking Consultancy and Solution Provider Company)
05.2017 - 04.2019
- Responsible for running the organization's core network smoothly, planning and implement new technology on business demand through Professional and Technical proficiency
- Manage & deployment ISP, IIG, IPTEL, New POP network, Corporate, Wireless Network, Cisco pseudo wire, OSPF, Advance OSPF, ISIS, IBGP, EBGP, MPLS, Unified MPLS, Inter AS MPLS(option A,B,C), Global MPLS, IPLC, VPLS, VPLS Multihomed, DMVPN, VSS, Stacking, cascading
- Design and Implement Bank Secure Data Connectivity using IPSEC, IPSEC with Redundant WAN, GRE tunnel, DMVPN(MGRE), DMVPN over IPSEC, DMVPN over OSPF, DMVPN over BGP, MACsec, IPIP tunnel, Eoip Tunnel
- DOS and DDOS attack detection and protection, wireless network protection, Malware protection, Network Scanning (Nessus), Social Engineering and protection, SQL Injection and protection, Web security, Email security, DHCP Security, Port security
- Manage all Layer2 & Layer 3 Cisco switches (2900,3560,5010), Cisco Router (7606,7200,2900, ASR1000), Cisco Firewall (5505, 5525, 5585), Cisco ESA, Juniper Router(ACX 1100, MX-5, MX-10, MX-80, SRX-240H), Cisco IOS, XE, XR platform
- Monitoring overall network Fast Convergence(BFD,IPSLA,FRR,OSPF LFA) latency, live traffic, Device status, Global Routing (SolarWinds, Zabbix, PRTG, CACTI, NetFlow)
- Partial Multicast design and implementation for IPTV
- Windows Server solution (Active directory, WDS, DNS, WEB, Mail), Exchange Mail server
- Prefixes base load sharing for remote pop where limited capacity with NTTN
- Ensure best possible route for user demand destination, Policy based routing, DDOS Protection, RTBH
- Manage Mikrotik router, Cisco router, Juniper router, Cisco ASA firewall(HA,Cluster),Cisco ESA, All kinds of wifi Router & Access point(indoor & outdoor)
- Manage P2P Wireless Radio Network(Bridge & Route)
- Routing manage and configuration over 50 pops, IIG with 4 Upstream & more than 3000 Corporate clients using exterior (BGP) and interior (OSPF, IBGP) routing protocols
- Planning and designing IP based network and IP telephone service for corporate client with sophisticated means and ensuring quality of services, Network expansion, Recovery and Troubleshooting
- Design and accomplish Network advanced firewall on the basis of maximum-security solution and network enhancement
- And also design various levels VPN solution (MPLS, Layer 2/3) with implementing maximum security
- Configuring and controlling traffic flow (inbound and outbound), load balancing, bandwidth shaping(ET, Mikrotik, Juniper) as of organization's profit demand
- Maintain GPON network using OLT(GWD) and onu, BDCom OLT and BDCOM Onu
- Juniper, Cisco routing (OSPF, EBGP, IBGP, Static routing, Bandwidth control, SNMP)
- Research, Development and Implementation of new technology, keep up to date documentation, presentation, technical coordination with organization engineers and clients
- Manage clients (Corporate, Bank) Layer2 and Layer3 Data Connectivity using IPSEC, Gre, IPIP, Eoip tunnel
- Configure client Mikrotik filter(all block except single web site, web deny mail and skype allow), Load balance within dual ISP, Bandwidth Control, ARP filtering, DHCP Lease security, Script for schedule bandwidth increase or decrease
- Work with NTTN provider, Telco(GP, Banglalink) and troubleshoot related L2/L3 link over MPLS(cisco, Juniper, Huawei) and for quick service some situation guide them for troubleshoot L3VPN and end to end LSP, EBGP.
Sr. Technical Manager
Eureka Technologies Limited
03.2014 - 04.2017
- Provide high level of technical response to the customers
- Primary responsibilities include performing project-based engineering, design, installation and troubleshooting of data/security networks
- Assist clients through planning, design and implementation of secure data communications networks
- Develop comprehensive graphical and text-based design documentation and effectively manage the implementation process from design to customer acceptance
- Design and implementation network and network security in different kinds of organization with cisco and Palo Alto network product
- Design and implementation virtualization in datacenter with clustering and HA Manage INC partnership and certifications with Cisco and Palo Alto network
- Provide Second level local support for resolving customer IT support issues for high and emergency tickets
- Performing as Technical Lead for Solution deployment and integration of Red Hat Enterprise Linux and virtualization-based Infrastructure setup with High Availability, Load Balancing cluster and Geographical Redundancy technology
- Install and configure security patch, emergency correction patch, upgrade application, database and storage platforms
- Ensure Security & Compliance of Existing or New Server Operating systems and Application compliance are properly in place, including quality control, information risk management, or information systems risk assessment
- Guide End-User Computing (EUC), Infra & Application operation team and stakeholders on remediation of vulnerabilities, security holes based on the assessment of standard operational guidelines, Vulnerability & Penetration Testing report
- Ensure Periodic Security Health Check-up for EUC, Infrastructure and Applications systems
- Ensure all records relating to Service Requests, Incidents, Problems and Knowledge Managements are completed accurately and within agreed timeframe
- Maintain high-quality, up-to-date documentation for agile hardware and software solutions, and prepare operational guidelines, technical reports and specifications for inventory system maintenance
- Supporting wider team with knowledge sharing, technical training, via knowledge base communications (emails, how-to guides etc.) and contribution at team meetings.
Technical Manager
New Generation Technology Ltd.
10.2011 - 02.2014
- Designing and implementing Routing, switching, network security and VOIP networks for our clients using CISCO solutions
- Provide technical presentations on client end on CISCO routers, switches, security and VOIP products
- Network planning, deployment, manage and monitor of a large network of New Generation Technology and also manage an IT support team
- Maintain and configure OSPF for my internal network within 24 NGTL POP's & 16 client's POPs and internet connectivity using BGP as well
- Distribute and manage total 24 blocks IP among all POP's of NGTL and has to maintain bandwidth distribution among all POPs
- Maintain and monitor all pops using NTTN provider network like summit, fiber at home
- Perform and monitor normal security procedures, give advice to users on standard security protocol and vulnerable ports
- Responsible for security policies, intrusion detection and prevention, incident response, backups and disaster recovery
- Research all sorts of existing and upcoming technologies to build a state of the art and robust network
- As an ISP control bandwidth for different client using ALOT and monitor all Technical support team
- Configure and monitoring MIKROTIK router for some medium scale client and corporate user for different client's pops
- Installation, configure and Monitoring V-sat for backup service.
Sr. System Engineer
Communication Solution Ltd.
04.2010 - 08.2011
- Provide technical presentations on client end on CISCO routers, switches, security and VOIP products
- Provide technical presentations on client end on NORTEL routers, switches, security and VOIP products
- Installation Commissioning and trouble shooting for NORTEL PBX, VOICE and data system
- Maintain Configure and monitoring for my internal network, Mail server, Data Server and print server
- Attended all pre bid meeting for Technical quarries
- Support all clients end for CISCO and NORTEL Product
- Pick clients complain & solve over phone & if required visit client office & solve, all kinds of wifi router, Mikrotik router, Mail server Installation, Mail server new user creation & deletion
- Manage POP with VLAN network
- Network performance & Uptime monitoring, Et bandwidth manager maintain for Bandwidth controlling.
Sr. System Engineer
Communication Solution Ltd.
03.2008 - 03.2010
- BTS installation and Microwave wave installation and commissioning
- Rectifier and Battery Installation for BTS ROOM
- Provide technical presentations on client end on CISCO routers, switches, security and VOIP products
- Provide technical presentations on client end on NORTEL routers, switches, security and VOIP products
- Installation Commissioning and trouble shooting for NORTEL PBX, VOICE and data system
- Maintain Configure and monitoring for my internal network, Mail server, Data Server and print server
- Complete and Signoff all projects that assigned to me
- Attended all pre bid meeting for Technical quarries
- Support all clients end for CISCO and NORTEL Product.
Education
Bachelor of Science - Computer Science And Engineering
Ahsanullah University of Science And Technology
Dhaka,Bangladesh07.2008
Skills
Network Administration: MPLS, BGP, OSPF, ISIS, RIP, EIGRP, STP, PVST, RSTP, HSRP, VRRP, GLBP, VLAN, VTP, DTP, Juniper, Cisco, Mikrotik, Subnetting, VPLS, VPWS, IPSEC, Data Connectivity Solution, IP-Tel Solution, WiFi Solution, CCTV solution, SMS Gateway, NMS, NAS, Attendance & door lock system, Network design, Network Implementation & Troubleshooting, Network Automation and programmability
Security: Cisco ASA firewall (HA, Cluster), Cisco ESA, Network Scanning (Nessus), Social Engineering, Dos, DDOS & protection, URPF, Stateful and stateless, Malware Protections Injection, Session Hijacking and protection, Wireless Hacking and Protection, Web Security, Email Security, IPS/IDS, Network Security, Port security, DHCP, Security, Cryptography, IPsec, GRE, IPIP, EOIP, Cisco FTD, Palo Alto Firewall
Server Administration: Mail, Gateway, FTP, WEB, NAS, IPTEL solution, Windows Server (Active directory, WDS, DNS)
Network Design: Microsoft Visio
Programming Language (basic knowledge): python, C, Java, HTML, PHP
Database (Oracle), SQL, MYSQL
Network Troubleshooting
Windows administration
Remote Support
IT Infrastructure Management
Firewall Administration
System Administration
Network security systems
Network architecture design
Affiliations
Associate member of IEB(Institute of Engineer's Bangladesh)
Thesis Work
Global System for Mobile Communication (GSM), Grameen Phone Ltd., GSM, System Architecture, GPRS, EDGE, BTS, BSC, MSC Radio Planning Microwave radio and Transmission Panning
Personal Information
- Father's Name: Md. Abu motalib
- Date of Birth: 01/01/86
Other Skills
Windows 98, 2000, XP, Linux (Redhat-8 & 9, Enterprise 4), Sun Solaris, Centos 6, Centos 7, Ubuntu., Packet tracer 7.0, MATLAB, Adobe Photoshop, MX Dream waver, Microsoft Office 98/ 2000/ XP,/8/10, Internet Browsing, C and C ++ languages, Java, Visual Basic 6.0. PHP, Mysql., Fluent in English and Bengali both verbal and written., Skilled in business and commercial correspondence as well as writing reports and dealing with multimedia presentation
References
Will be provided Upon Request
Hobbies and Interests
Playing and watching Cricket, Traveling, Reading novels
Certification
- CCNA (Routing &Switching)
- CCNA Security
- SCOR (CCIE WRITTEN)
- Red Hat Certified Engineer(RHCE)
- Certified ethical hacker(CEH)
- Palo Alto Networks Certified Network Security Administrator (PCNSA)
- ePMP (Cambium Networks)
- cnPilot (Cambium Networks)
Timeline
Senior Engineer (Network and Systems)
Creative Technologies Australia
02.2023 - Current
Network and Systems Engineer
Enigma Cybernauts Pty Ltd.
06.2019 - 01.2023
Chief Technology Officer
Rasa Technologies (IT, Networking Consultancy and Solution Provider Company)
05.2017 - 04.2019
Sr. Technical Manager
Eureka Technologies Limited
03.2014 - 04.2017
Technical Manager
New Generation Technology Ltd.
10.2011 - 02.2014
Sr. System Engineer
Communication Solution Ltd.
04.2010 - 08.2011
Sr. System Engineer
Communication Solution Ltd.
03.2008 - 03.2010
Bachelor of Science - Computer Science And Engineering
Ahsanullah University of Science And Technology
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