PERSONAL PROFILE
I am an enthusiastic, passionate, hardworking and reliable person who has gained invaluable
experience in the field of System Administration with Information Technology, Telecommunication
and Information Security exposure. I have a positive and caring nature and believe that I can bring a
number of excellent skills and attributes to your organization.
EXPERIENCE
Employer name: NCS Group
Department: DevSecOps / Application Architecture
Designation: Senior DevOps Engineer / IT Architect
Location: Singapore
Key Responsibilities:
▪ Design, implement and operate Container-based Microservices in Kubernetes Cluster using
AWS EKS.
▪ Design, build and maintain CI/CD Pipelines with related tools like AWS CodePipeline,
CodeBuild, CodeCommit, BitBucket etc.
▪ Automate and maintain the whole Cloud infrastructure using Terraform.
▪ Define, install, and upgrade Kubernetes applications using Helm charts.
▪ Publish, maintain and monitor APIs through Amazon API Gateway as the front door of
Kubernetes Services.
▪ Working as a DevOps Engineer in infrastructure and service migration projects from Bare-
Metal to AWS cloud.
▪ Security Hardening with IAM policies, WAF setups, SSL implementations, TLS updates,
AWS GuardDuty, Traffic Localization and Access management.
▪ Work closely with Singtel Dash development teams to ensure that solutions are designed with
customer experience, performance and security in mind.
Time period: 6 September 2023 – Present
Employer name: Digify Pte Ltd
Department: DevOps
Designation: Senior DevOps Engineer
Location: Singapore
Key Responsibilities:
▪ Responsible for maintaining, securing, architecting and automating the full infrastructure
based on AWS.
▪ Segregate the Development environment from QA & Production and perform full setup with
data and configuration migration.
IMROZZOHA CHOWDHURY
Unit 1/97 Victoria Rd,
Punchbowl, Sydney,
NSW 2196, Australia.
Mobile: +6583603616
E-mail: shohash@yahoo.com
Linkedin: https://www.linkedin.com/in/imrozzoha-chowdhury
Facebook: https://www.facebook.com/Shohash
▪ Architect and implement CI/CD pipelines (Staging, QA, Production) for Microsoft IIS and
ASP.NET Web Applications using PowerShell, Jenkins and AWS CodePipeline.
▪ AWS tech stack: IAM, VPC, S3, EC2, DynamoDB, RDS Aurora, Lambda, KMS, Media
Convert, CloudFront, Route53, WAF, SES, SQS, SNS, OpenSearch, CloudWatch,
CloudFormation, GuardDuty.
▪ Maintain and update the SLA performance criteria with disaster recovery using regional
failover and data backups.
▪ Work with AWS WAR principals: Excellence, Security, Reliability, Performance Efficiency,
Cost Optimization and Sustainability.
▪ Streamline regular Web App deployment process with well-documented procedures aligning
the stakeholders.
▪ Data Localization with detailed research, test, analysis and deployment using CloudFront
CDN to accelerate API calls for better performance of localized traffic.
▪ Security Hardening with IAM policies, WAF setups, SSL implementations, TLS updates,
traffic localization and access management.
▪ Creating dashboards to monitor, analyze and troubleshoot the infrastructure health,
application issues and customer complaints.
▪ Planning projects and being involved in project management decisions.
Time period: 11 October 2022 – Present
Employer name: Certain, Inc.
Department: DevOps & IT
Designation: Site Reliability Engineer
Location: San Francisco, California, United States
Key Responsibilities:
▪ Design and maintain core infrastructure systems running in Amazon Web Services and
Microsoft Azure.
▪ Perform installation, management, monitoring, tuning, and troubleshooting of Linux OS
running on servers and containers.
▪ Assisted with the development of a new BI+ML software product. It is built using Java,
Python, Scala, and AWS components are S3, Glue, ECS, CodePipeline, CloudFormation,
EC2 and Athena. Tableau is used for Data Visualization. Salt is used for Infrastructure as
code (IaC).
▪ Working as a member of a global technology Development Operations (DevOps) team. We
operate a 24/7 Software as a Services (SaaS) environment for customers all over the world.
▪ Maintenance of Continuous Integration (CI) and Continuous Delivery (CD) ecosystem: Jira,
Bamboo, Fisheye, Crucible, SonarQube, Jenkins, Git, Apache Subversion etc.
▪ Designed an AWS migration strategy for products acquired via a company acquisition. Tech
stack was Ruby on Rails with Rackspace Cloud Servers hosting Kubernetes cluster and
PostgreSQL (2 tier architecture). Migration strategy involved the use of CloudFormation,
RDS, EC2 with Auto scaling, EKS clusters (3 tier architecture). Second phase of the plan was
to migrate the whole compute to ECS. Cost analysis was completed to help justify the project.
▪ Ensure that applications and services are highly available, secure, reliable, and performant
through world-class automation, monitoring, altering, and self-healing capabilities.
▪ Analyze system metrics and logs to ensure maximum uptime and delivery. Tools include
Elasticsearch, Logstash, Kibana, Datadog, CloudWatch, OpenSearch etc.
▪ Build and maintain configuration and infrastructure management, service deployment
frameworks, infrastructure as a code, and utility software.
Time period: 09 November 2021 – 10 October 2022
Employer: Freelance Technical work and Consultancy (Self-employed)
Department: DevOps & IT
Designation: Public Cloud, System Admin & Linux - AWS, Microsoft & Red Hat
Location: Dhaka, Bangladesh
Major work Areas – Amazon Web Service (AWS), Microsoft Windows Server, Red Hat Linux
Scripting – Ansible, Terraform, Bash, SQL, XML, JSON, YAML.
Containerization – Podman, Docker, Docker Swarm, Kubernetes.
Information Security – AWS IAM, Identity and Access in Windows Server 2016/2019, Red Hat
Identity Management
Microsoft 365 – Installation, Configuration, Maintenance and Troubleshooting
Certifications:
• AWS Certified Solutions Architect - Associate
• AWS Certified SysOps Administrator - Associate
• Microsoft Certified Solutions Associate - Windows Server 2016, 2019
• Red Hat Certified System Administrator (RHCSA) - Version 8
• Red Hat Certified Engineer (RHCE) - Version 8, Ansible
Time period: 01 July 2019 – 08 November 2021
Employer name: Grameenphone Ltd.
Department: Core and Service Projects, Technology
Designation: Senior Lead Engineer
Location: GPHOUSE, Dhaka, Bangladesh
Key Responsibilities:
Implement end-to-end Cloud Computing and IT projects:-
Network Function Virtualization (NFV) with Virtual Network Function (VNF):
▪ Nokia Cloud Native platform installation.
▪ Huawei VNF deployment upon Nokia Cloud Native platform.
▪ Grameenphone's Syslog Server
▪ Nokia Security Solution - NIAM
VIVO.OOO Audio Conferencing:
▪ Deploy 35 Virtual Machines (VM) over 4 Physical Servers in Grameenphone Data Center
with connectivity towards the Core and Charging nodes.
Time period: 01 November 2017 – 30 June 2019
Employer name: Grameenphone Ltd.
Department: Voice & Data Service Operation, Technology
Designation: Lead Engineer
Location: GPHOUSE, Dhaka, Bangladesh
Key Responsibilities:
▪ System Administrator of Subscriber Database system based on MS SQL Server and Oracle
database.
▪ System Administrator of Core network nodes based on SUSE Linux and Microsoft Server.
▪ Design and Lead various technical trials and testing (e.g. UAT, IOT) of new services,
products and network elements.
▪ Analyze and resolve Nessus Vulnerability Scanner Penetration Test outcomes from network
nodes.
▪ Provide technical leadership and consultancy to internal and external stakeholders regarding
any audit, security, product development and performance optimization.
▪ Preventive Maintenance of network systems - Quarterly & Deep Health Check.
▪ User Identity and Access Management as an admin of Grameenphone's Security Portal.
▪ Network Security Audit execution, reporting and take remedial action as System
Administrator
Major projects:
• Migration Manager - Largest HLR Expansion and Migration in the world (53.3 Mn SIM, 35.5
Mn subscribers)
• Migration Lead - First ever SPS Integration & Migration in GP network (16 services, 80
nodes, 6 vendors)
• Operations Lead - First ever HLR Failover Drill in GP network
• LTE Trial for the first time in Bangladesh & LTE IOT
• Contextual Marketing Platform (CMP) by Danateq
• Network Functions Virtualization (NFV) with Nokia & Huawei
• Huawei HSS to Nokia HSS migration
• Nokia Security Solution – NIAM
Time period: 20 May 2015 – 31 October 2017
Employer name: Grameenphone Ltd.
Department: Voice & Data Service Operation, Technology
Designation: Senior System Engineer
Location: GPHOUSE, Dhaka, Bangladesh
Key Responsibilities:
▪ System Engineer of Subscriber Database system based on MS SQL Server and Oracle
database.
▪ System Engineer of Core Network nodes based on SUSE Linux and Microsoft Server.
▪ Admin authority and User maintenance of core nodes.
▪ Subscriber Profile and dump management.
▪ Provide 24x7 supports for critical troubleshooting related to CS core nodes/services
▪ Problem analysis according to trace, log and system alarms and take necessary initiatives.
▪ Analyze network outage incident and take proactive measures.
▪ Network node’s User and Provisioning Command Log integration onto ArcSight Logger and
regular maintenance.
▪ Oracle Identity Management and Oracle Privileged Account Manager integration with
network nodes by User Access analysis, audit and reporting.
Major projects:
• Full Data Network swap
• Integration and Access Management (IAM)
• Security Incident and Event Management (SIEM)
Time period: 01 January 2012 – 19 May 2015
Employer name: Grameenphone Ltd.
Department: Revenue Assurance & Fraud Management, Technology
Designation: Executive
Location: GPHOUSE, Dhaka, Bangladesh
Key Responsibilities:
▪ Establish Revenue Assurance controls with complex SQL queries in MS SQL server and
Oracle database server.
▪ Monitoring of Revenue Assurance controls/alarms in RAFM system portal.
▪ Reconciliation and CDR analysis of Telecom nodes with ETL process and SQL queries.
▪ Understand and document relevant processes identifying the risks and design probable areas
of control/alarm/process establishment on the overall business processes.
• Reconciliation with other Grameenphone servers i.e. Sales Tracking System, Inter-connect
Billing System (IBS), Data Warehouse (DWH) & ERP.
• Preparation of RAFM weekly, monthly, quarterly, AT, MT report & presentation and control
documentation.
Time period: 21 June 2010 – 31 December 2011
EDUCATIONAL PROFILE
2009 Master of Information Technology Studies
The Australian National University (ANU), Australia
77 Percent Marks on Average
2008 Master of Telecommunication Engineering
Monash University, Australia
81.25 Percent Marks on Average
2006 Bachelor of Science in Computer Engineering
American International University-Bangladesh (AIUB)
CGPA - 3.8 (Out of scale 4)
PROFESSIONAL TRAININGS
Type
Title
Period
Oracle Database
Oracle Database 10g: Administration
Workshop I
October 2011
Oracle Database
Oracle Database 10g: Administration
Workshop II
December 2011
Red Hat System
Red Hat System Administration – II
Red Hat System Administration – III
RH318 Red Hat Enterprise Virtualization
August 2014
Huawei NFV
NFVI Core Technologies & Product
October 2016
Tableau Desktop
Tableau Desktop I & II (Basic & Intermediate use
of Tableau, license & governance)
March 2017
Project Management
PRINCE2 Foundation Certificate in Project
Management
November 2017
Project Management
PRINCE2 Practitioner Certificate in Project
Management
November 2017
Cloud Computing
AWS Certified Solutions Architect – Associate
November 2019
Cloud Computing
AWS Certified SysOps Administrator - Associate
February 2020
Windows Server
Microsoft Certified Solutions Associate: Windows
Server 2016
January 2021
Red Hat Enterprise
Linux
Red Hat Certified System Administrator (RHCSA)
- Version 8
March 2021
Red Hat Enterprise
Linux
Red Hat Certified Engineer (RHCE) - Version 8,
Ansible
March 2020
PROFESSIONAL ACHIEVEMENTS
✓ Nominated for Grameenphone Ltd. Q2, 2016 Divisional Excellence Award for ensuing the
network quality leadership by delivering one of the most crucial technology projects of the
year in time and with quality.
✓ Winner of “Made It Happen” award from Core and Service Platforms Operations section of
Technology division of Grameenphone Ltd. on Q4, 2016 for flawless execution of Huawei
HLR Expansion and Migration in Grameenphone network.
✓ Rated “Exceeds Expectations” by Grameenphone Ltd. for professional performance on the
year of 2016 as a recognition of remarkable technical contribution.
✓ Nominated for Grameenphone Ltd. Q4, 2017 Divisional Excellence Award for managing
first-ever vDSC project within Telenor group (under One Asia Core Virtualization Portfolio)
and also in GP network in a very smooth and controlled manner with completing the complex
project within the timeline.
✓ Winner of Grameenphone Ltd. Q4, 2018 Q Awards for successfully rolling out Single Virtual
platform for PS core in Grameenphone network (Huawei VNF, Nokia NFV platform).
ACADEMIC ACHIEVEMENT
Member of the Golden Key International Honour Society as certified by Monash University, Australia
in 2008 and The Australian National University (ANU) in 2009 [Membership is by invitation only to
the top 15% students in an academic year across all faculties].
REFFERENCE
Reduan Hasan Khan, PhD
Product Owner Principal
Internet of Things (IoT)
Telstra Corporation Limited
Melbourne, Victoria, Australia
Phone: +61436623493
Email: Reduan.Khan@team.telstra.com
Gerard Larios
Vice President
IT Development Operations and Security
Certain, Inc.
San Francisco, California, United States
Phone: +16505045926
Email: gerard.larios@gmail.com