UNIX/Linux & Network Support Engineer

Badrul Alam Sarker Mobile: 646-***-****

E-mail: ******.******@*****.***

CISCO ID: CSCO11251088 Linux ID: 140-038-647 AWS ID: AWS058635 Juniper ID: JPR77354 CEH ID: ECC4652073189 CompTIA ID: COMP001022294954 CAREER OBJECTIVE

Possess of good professional experience and understanding in Telecom & IT industries on large scale UNIX System Administration with AIX, HP-UX, LINUX, Storage Area Network, Backup and customer-service solutions. Seeking a position in a dynamic and larger environment where I can do maximum use of my aptitude and can contribute to the organizational growth.

WORKING EXPERIENCE

HIGHLIGHTS OF EXPERIENCE

Experience (1)

Company : IT ASSET MANAGEMENT GROUP (ITAMG)

Position : IT Hardware Technician

Division : IT

Duration : October 2025 to Till Now

Experience (2)

Company : D&D TECH USA INC.

Position : IT Support Analyst

Department : Customer Support

Division : IT

Duration : January 2020 to August 2025

Job Responsibilities:

While working as an IT Support Analyst with D&D TECH USA INC, I am responsible for handling users and customers for Windows, Mac and Linux Systems and my day-to-day duties are as below:

• Troubleshoot hardware and software issues on desktop computers

• Install and configure operating systems, applications, and software updates

• Maintain and repair computer hardware and peripherals

• Set up and configure new computers and peripherals

• Assist with network connectivity issues

• Provide technical support to end users

• Monitor and maintain system performance

• Create and maintain user accounts and profiles

• Assist with data backup and recovery

• Ensure compliance with security policies

• Provide training and guidance to end users

Experience (3)

Company : Augure Bangladesh Ltd.

Position : Engineer-Network Operation

Department : Technology

Division : IT

Duration : 1st November 2016 to 30th June 2018

1. Level 2 Troubleshooting of WiMAX NE and monitoring of NMS M2000, N2000, U2000, Nagios, Cacti etc. 2. Analysis of core nodes such as Routers NE40E, NE40E-X3, DBS3900, Firewall (EU8080E, EU1000E), S3300, S5300, S9300, S6502 & CISCO switches

3. Testing DNS Performance and generating evaluation status report technical reporting & documentation of Data Center Equipment’s and Data backups for Core, BSS & Transmission, Log files and other systems databases 4. Monitoring and collecting User data from of WiMAX access node such as DBS3900, WASN-GW nodes 5. Analyzing alarms at Nagios, Cacti using Visual Trace and Application Manger portals for fault analysis and troubleshooting of NI Density issues

6. IIG BW management and routing at Huawei Equipment’s and prefix shifting in Core Nodes for proper congestion control and traffic shaping for WiMAX, Wi-Fi, SME and Enterprise clients 7. Maintaining different trackers like Planned Outage, Rural Site Outage, Google Earth operational links and execution of exempt mode at WASN gateway for traffic bypassing 8. Routine network health checkup and overall outage recovery initiatives of BTS, ENT, WiFi, SME clients by managing operational resources of different regions

9. Managing vendors working with DWDM, SDH networks for smooth day to day service delivery and scheduled planned maintenance and relocation activities

10. Overseeing datacenter and network security and maintaining liaison with Internal and external stakeholders (I.e. IIG, Huawei, Transmission vendors etc.)

11. Fault evaluation, Risk analysis and Critical decision making on demand to minimize client interruption Experience (4)

Company : Thakral Information Systems Ltd.

Working Location : Airtel Bangladesh LTD.

Position : Sr. System Support Engineer.

Department : SSO (System Server Operation)

Division : IT

Duration : 1st January 2011 to 6th October 2016

Responsibilities:

• Design, Implement, Administrate and Monitor backup resources for different type of architecture to ensure Data protection, Data integrity and high availability of all agreed Databases and applications.

• Define backup strategies and emergency recovery procedures for all Critical Clustered and standalone servers, Applications and databases to align with strategic goals and objectives of IT operations.

• Implement and Manage data archival policy for critical Databases and Applications.

• Ensure operational excellence and effective customer support by meeting KPI and SLA targets.

• Strictly follow IBM GSD policy to ensure maximum security and integrity of customer Data and maintain compliance.

• Publish Backup Dashboard (Daily, Weekly and Monthly) to Client to provide brief overview along with detailed backup log.

• Management and optimization of the Storage Area Network.

• System administration support for Servers, Database and Services.

• Install and debug new and upgraded backup software on server and client platforms, ensuring compliance with proper licenses.

• Unix System Scripting for efficient operation continuity and system monitoring.

• Conducted regular vulnerability assessments using Rapid7 InsightVM and Tenable.io/Nessus to identify security weaknesses across on-prem and cloud environments.

• Performed container security scanning (Docker, Kubernetes) using integrated vulnerability tools to detect misconfigurations and exposed packages during build and runtime phases.

• Implemented and maintained automated vulnerability scanning pipelines for CI/CD environments to ensure early detection in development workflows.

• Interpreted scan results and collaborated with cross-functional teams (DevOps, AppSec, and Infrastructure) to prioritize and remediate vulnerabilities based on CVSS scores and asset criticality.

• Maintained asset inventory integrations with scanning tools for comprehensive coverage and accuracy in vulnerability detection and reporting.

• Created and delivered clear and actionable vulnerability management reports and dashboards for technical and executive stakeholders.

• Monitored for newly disclosed vulnerabilities (zero-days, CVEs) and initiated targeted scans and remediation plans accordingly.

• Enforced security compliance with organizational policies and industry standards such as CIS Benchmarks, NIST, and ISO 27001.

• Assisted in vulnerability exception and risk acceptance processes, documenting rationale and timelines per security governance practices.

• Provided subject matter expertise for audits, compliance reviews, and penetration testing preparation related to vulnerability exposure.

Experience (5)

Company : Airtel Bangladesh LTD.

Working Location : UTTARA MSC (Dhaka Square Building )

Position : System Support Engineer.

Department : IT Infrastructure & Services

Division : IT

Duration : 1st January 2010 to 31st December 2010 Responsibilities:

• Install, configure, and maintain Linux servers (RHEL, CentOS, Ubuntu) in production and staging environments.

• Perform regular system updates and security patching using yum, dnf, and apt package managers.

• Monitor system performance and troubleshoot CPU, memory, and disk utilization issues in real-time environments.

• Setup and manage user accounts, groups, permissions, and access control based on company security policies.

• Configure and maintain server backups using tools like rsync, cron, or backup management systems.

• Automate daily administrative tasks using shell scripting (bash) to reduce manual workload.

• Setup and configure NFS and Samba shares for internal file sharing across Linux and Windows systems.

• Implement firewall rules using firewall or iptables for server security and access control.

• Perform Linux server hardening following company security standards.

• Install and manage basic web services such as Apache and NGINX for application hosting.

• Configure and manage LVM partitions, disk mounting, and filesystem maintenance tasks.

• Troubleshoot boot issues, system crashes, and service failures on Linux servers.

• Perform scheduled server health checks and generate operational reports for system status.

• Setup crontab jobs for scheduled tasks like log rotation, data syncing, and system cleanups.

• Participate in on-call rotation and provide Level-2 support for Linux server-related incidents.

• Install and configure monitoring agents (Zabbix/Nagios) and handle basic monitoring configurations.

• Coordinate with application and network teams for server-related configuration and troubleshooting.

• Document all system configurations, changes, and operational procedures following IT standards.

• Participate in system migrations, server upgrades, and new deployments under team supervision.

• Maintain configuration of SSH access, key management, and basic audit logs for compliance purposes. Experience (6)

Company : Warid Telecom International LTD.

Working Location : UTTARA MSC (Dhaka Square Building )

Position : IT NOC Engineer.

Department : IT Infrastructure & Services

Division : IT

Duration : 3rd May 2009 to 31st December 2009

Responsibilities:

Provide O&M services of the NGN network and monitor the production network and Database servers.

Respond to all events and alerts in the monitoring systems and closely observe all the Database billing system and Value-added services using some Script (Unix) to find out any problem within this system services.

Communicate with different vendors regarding technical problem of any critical issues of any servers and escalate this problem to specific technical specialist and maintain the log report of all about these issues.

Closely observing the System Disk uses, CPU uses, Backup status, CDR status, Mediation status, Rating and Roaming status.

Data Base (Oracle) monitoring & Business Copy operation on HP-UX.

Taking zero down time (ZDB) and RMAN backup.

Data Protector Back up log checking.

Oracle Database Table export log checking.

Perform scheduled maintenance task in all production servers.

Maintain a case load and work with NOC team to ensure the efficient resolution of all cases. Receive open workable cases from the previous shift and pass remaining open workable cases to the ensuing shift.

Notify different technical teams against any Problem with network

Preparation of report information as required.

Experience (7)

Experience (8)

Company : Tech Valley Networks LTD (TVNL).

Working Location : Warid Telecom International LTD.

Position : IT Help Desk Engineer.

Department : IT Help Desk

Division : IT

Duration : 10th Dec 2006 to 30th April 2009.

Company : TECH SHADOW ( TS )

Working Location : TECH SHADOW

Position : System Engineer.

Department : IT Systems & Network Support

Division : IT

Duration : 1st Jan 2005 to 30th Nov 2006

EDUCATION

Bachelor of Computer Science & Engineering (CSE) University : The University of Comilla

Department : Computer Science & Engineering

Year : 2007

VENDOR CERTIFICATION

CISCO : Cisco certified Network Associate. (CCNA)

: CCNP Routing and Switching (CCNP)

01. Implementing Cisco IP Routing

02. Building Converged Cisco Multilayer Switched Networks 03. Troubleshooting and Maintaining Cisco IP Networks

: CCNP Data Center

01. Implementing Cisco Data Center Unified Fabric (DCUFI) CISCO ID : CSCO11251088

JUNIPER : 01. JNCIA-ER (Associate, Enterprise Routing) 02. JNCIS-ER (Specialist, Enterprise Routing)

03. JNCIA-EX (Associate, Enterprise Switching)

04. JNCIS-SEC (Specialist, JUNOS Security)

JUNIPER ID : JPR77354

LINUX : 01. RHCSA (Redhat Certified System Administration) 02. RHCSE (Redhat Certified System Engineer)

LINUX ID : 140-038-647

CEH : Certified Ethical Hacker

CEH ID : ECC4652073189

CompTIA : 01. CompTIA A+

02. CompTIA Cybersecurity Analyst (CySA+)

03. CompTIA Security+

04. CompTIA Security Analytics Professional (CSAP) COMPTIA ID : COMP001022294954

AWS : 01. AWS Certified Solutions Architect – Associate 02. AWS Certified Security – Specialty

AWS ID : AWS05863582

CONTACT INFORMATION

Name : Badrul Alam Sarker

Present Address : 220 Crown Ave, Floral Park NY-11001. E-mail Address : ******.******@*****.*** ; ******.******@*******.*** Cell No : 646-***-****

Badrul Alam Sarker

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