KOUSHIK BHOWMICK
Summary
Innovative Technical Architect with 13 years of experience in designing and managing scalable hybrid IT infrastructures. Expert in integrating on-premises data centers with AWS and Azure, and modernizing environments through Azure Stack HCI. Drives DevOps initiatives and automates infrastructure with Terraform and PowerShell, enhancing efficiency and reducing provisioning times.
Overview
14
14
years of professional experience
1
1
Certification
Work History
TECHNICAL ARCHITECT AND TRANSITION LEADER
TATA CONSULTANCY SERVICES (TCS)
Kolkata
01.2024 - Current
- Architect and lead large-scale Hybrid Cloud Transformation programs across Azure, Azure Local (Azure Stack HCI), VMware, Cisco UCS, and enterprise datacenter environments, enabling highly available, scalable, and resilient infrastructure platforms supporting mission-critical business applications across global operations.
- Conduct comprehensive infrastructure discovery and assessment workshops to analyze existing customer environments, including compute, virtualization, storage, networking, security, backup, disaster recovery, and cloud services. Develop detailed current-state architecture landscapes using Draw.io and Visio, identifying architectural gaps, operational bottlenecks, technical debt, capacity constraints, security risks, and opportunities to improve business continuity through optimized RTO and RPO targets.
- Design future-state target architectures and transformation roadmaps by modernizing legacy infrastructure, introducing Azure Local, Azure cloud services, automation frameworks, and cloud-native operational models. Delivered High-Level Designs (HLD), Low-Level Designs (LLD), Statements of Work (SOW), Design of Understanding (DOU), migration strategies, and operational governance frameworks aligned with business objectives, disaster recovery requirements, and defined RTO/RPO service targets.
- Led multiple infrastructure transition and transformation engagements across Americas and Japan, successfully managing end-to-end service onboarding, knowledge transfer, operational readiness, and steady-state handover activities through a structured RACI-based governance model. Achieved 100 percent transition milestone compliance while ensuring zero critical business disruption during service transition.
- Identified infrastructure optimization opportunities through workload consolidation, virtualization modernization, storage right-sizing, and cloud integration strategies, reducing infrastructure operating costs by approximately 25-30 percent, improving resource utilization by over 40 percent, and increasing overall service efficiency across the managed environment.
- Planned and executed infrastructure modernization, cloud migration, platform upgrades, and transformation activities through formal ITIL Change Management processes, including risk assessments, implementation planning, CAB approvals, stakeholder communications, rollback planning, validation testing, and post-implementation reviews, ensuring successful delivery with minimal business impact.
- Spearheaded Infrastructure-as-Code (IaC) and automation initiatives using Terraform, PowerShell, PowerCLI, Azure Automation, and scripting frameworks, reducing infrastructure provisioning time from multiple days to a few hours and eliminating over 70 percent of repetitive manual operational activities.
- Established security and compliance frameworks aligned with CIS Benchmarks, Microsoft Security Baselines, and industry best practices. Led vulnerability remediation programs that reduced critical and high-risk security findings by over 80 percent, improved compliance scores from approximately 65 percent to above 95 percent, and strengthened enterprise security posture through identity governance, access control standardization, system hardening, and proactive vulnerability management.
- Applied AI-assisted incident analysis, log interpretation, knowledge correlation, and automation-driven troubleshooting methodologies to accelerate issue resolution, improve operational efficiency, and support proactive problem management initiatives across hybrid infrastructure environments.
- Served as a trusted technical advisor for enterprise transformation programs, delivering scalable, secure, and cost-optimized architectures while ensuring all production implementations adhered to ITIL governance, change control procedures, security requirements, business continuity objectives, RTO/RPO commitments, and operational best practices.
TECHNICAL ARCHITECT
TATA CONSULTANCY SERVICES (TCS)
Kolkata
11.2019 - 12.2023
- Led complex VMware infrastructure modernization initiatives, including vCenter and ESXi lifecycle upgrades, cluster optimization, storage migrations, and performance tuning exercises, improving platform stability and reducing recurring infrastructure incidents by approximately 30 percent.
- Managed and mentored a high-performing L3 Infrastructure Support Team comprising 12 engineers across virtualization, cloud, Windows, and infrastructure domains. Provided technical leadership, operational governance, escalation management, and transformation guidance while fostering continuous improvement and knowledge-sharing practices.
- Collaborated with application, security, cloud, and infrastructure teams to design enterprise-grade cloud-native solutions while embedding DevOps practices, automation, and operational excellence principles throughout the service lifecycle.
- Partnered closely with global L3 engineering teams, vendors, and customer stakeholders to resolve critical Priority-1 and Priority-2 incidents within SLA commitments. Successfully led major incident response efforts, reducing Mean Time to Resolution (MTTR) by approximately 35 percent and improving service availability across business-critical platforms.
- Directed security remediation, patch management, infrastructure hardening, certificate lifecycle management, and compliance initiatives through controlled ITIL change processes, ensuring full auditability, governance compliance, and minimal production downtime.
IT ANALYST
TATA CONSULTANCY SERVICES (TCS)
Bangalore
06.2017 - 11.2019
- Led the successful transition of global virtualization and Windows infrastructure support services from the customer organization to TCS, ensuring 100 percent service continuity and operational stability throughout the engagement.
- Executed structured transition governance activities including stakeholder management, service onboarding, knowledge acquisition, operational readiness assessments, process documentation, and service acceptance, utilizing RACI-based frameworks to establish clear ownership and accountability.
- Conducted comprehensive infrastructure discovery and operational assessments across virtualization, Windows, storage, backup, and monitoring platforms, identifying optimization opportunities and developing actionable transformation roadmaps for service improvement.
- Partnered with architecture and engineering teams to recommend infrastructure modernization initiatives, improving platform stability, reducing recurring incidents, and enhancing service availability across business-critical environments.
- Supported major incident management, problem management, and root cause analysis initiatives, contributing to improved service reliability, reduced incident recurrence, and enhanced customer satisfaction.
SYSTEM ENGINEER
TATA CONSULTANCY SERVICES (TCS)
Bangalore
09.2015 - 06.2017
- Managed and supported large-scale VMware virtualized environments comprising enterprise business-critical workloads, ensuring high availability, operational stability, and adherence to SLA commitments.
- Performed infrastructure monitoring, capacity analysis, performance optimization, and health assessments using VMware vCenter, proactively identifying risks and mitigating potential service disruptions.
- Administered end-to-end virtual machine lifecycle management, including provisioning, decommissioning, resource optimization, template management, snapshot governance, and configuration compliance.
- Coordinated ESXi host patching, infrastructure maintenance activities, and platform upgrades through formal ITIL change management processes, minimizing business impact while maintaining service continuity.
- Collaborated with L2, L3, Storage, Network, and Windows teams to troubleshoot complex virtualization issues involving host connectivity, storage performance, resource contention, and VM availability.
PROFESSIONAL SYSTEM ADMINISTRATOR
DXC TECHNOLOGY (CSC)
Bangalore
08.2012 - 08.2015
- Managed VMware ESXi hosts, vCenter environments, Windows Server platforms, Active Directory services, DNS, DHCP, and associated infrastructure components to ensure stable and secure operations.
- Administered global Wintel and VMware infrastructure environments supporting enterprise business applications across geographically distributed datacenters.
- Provided end-to-end lifecycle management for HP ProLiant and Dell PowerEdge server platforms, including provisioning, hardware maintenance, firmware upgrades, troubleshooting, and performance optimization.
- Executed patch management, security remediation, and system maintenance through WSUS while establishing ITIL change management procedures, ensuring compliance and reducing operational risk.
- Investigated and resolved critical infrastructure incidents, conducted root cause analysis, and implemented corrective actions to enhance platform stability and minimize service interruptions.
Education
Master of Computer Applications - Cloud Computing
Jain University
09-2023
Bachelor of Computer Applications -
T.John College
Bengaluru07-2012
Skills
- Cloud platforms: Azure and AWS
- Virtualization: VMware vSphere and Citrix
- Automation and scripting: PowerShell and PowerCLI
- Containerization: Kubernetes
- Hardware platforms: Azure Stack HCI, Cisco UCS, and HPE Synergy
- Infrastructure as code: Terraform
- Operating System: Windows Server, Linux
Certification
- Microsoft Certified: Azure Administrator Associate
- AWS Certified Solutions Architect - Associate
- VMware Certified Associate - Data Center Virtualization
- VCE Certified Converged Infrastructure Associate (VCE-CIA)
Research Publication
A Novel Approach for Collaborative Last-Mile Performance Testing Implementation Using an Object-Oriented Approach, Koushik Bhowmick, Koushik R., Clarence J.M. Tauro, Vishal D. Souza, ACM SIGSOFT Software Engineering Notes, 39, 2, 1-4, 10.1145/2579281.2579297, 03/01/14
Personal Information
- Date of Birth: 11/25/87
- Nationality: Indian
- Marital Status: Married
Disclaimer
I hereby declare that all the details furnished above are true to the best of my knowledge and belief.
Timeline
TECHNICAL ARCHITECT AND TRANSITION LEADER
TATA CONSULTANCY SERVICES (TCS)
01.2024 - Current
TECHNICAL ARCHITECT
TATA CONSULTANCY SERVICES (TCS)
11.2019 - 12.2023
IT ANALYST
TATA CONSULTANCY SERVICES (TCS)
06.2017 - 11.2019
SYSTEM ENGINEER
TATA CONSULTANCY SERVICES (TCS)
09.2015 - 06.2017
PROFESSIONAL SYSTEM ADMINISTRATOR
DXC TECHNOLOGY (CSC)
08.2012 - 08.2015
Master of Computer Applications - Cloud Computing
Jain University
Bachelor of Computer Applications -
T.John College