About Bidhan Mandal
Karimpur Rishi Arabinda Pally

Bidhan Mandal is an accomplished Oracle-certified Database Administrator and cloud practitioner with over 17 years of extensive experience in enterprise database engineering, high-availability architectures, performance tuning, crisis management, and cloud solutions. He specialises in designing, stabilising, and optimising large Oracle environments spanning versions 9i to 19c, with a track record of delivering resilient backup and recovery strategies that enhance reliability and operational efficiency across production and test environments.

Specialising in Oracle performance tuning, RMAN and Data Pump automation, RAC, Data Guard, EBS (Apps Tech), cloning and migrations, capacity planning, automation, and storage optimisation, Bidhan has supported large-scale data warehouses and global multi-market deployments, including mission-critical banking and ERP systems. His approach is root-cause driven with an automation-first mindset, focusing on reducing incidents, improving job runtimes, and eliminating recurring space and wait issues while mentoring teams.

Currently working at Wizertech Informatics Pvt. Ltd. since 2015, Bidhan leads core DBA and Apps DBA responsibilities for clients like KOPT and Eveready, delivering installations, patching, performance tuning, Data Guard configurations, and automation projects. His prior experience includes roles at PCS Technology Ltd., Carnation Industries, SMSRC, Zenith, HCL, and Natural Technologies, providing comprehensive production support and 24x7 operations for banking and ERP clients.

Bidhan holds a B.A. from Calcutta University and numerous certifications, including Oracle 19c Certified Associate, AWS Solutions Architect, and multiple Oracle Cloud, Fusion, and AI foundational certifications.

Selected Technical Skills:

Oracle Databases (9i, 10g, 11g, 19c)

High Availability & Disaster Recovery (RAC, Data Guard, RMAN duplication)

Tools & Diagnostics (AWR, ADDM, ASH, SQL Trace, Explain Plan, Toad, SQL Developer)

Backup & recovery, cloning, capacity planning, storage tuning, EBS Apps Tech support

Operating Systems (Red Hat Linux, Windows Server families)

This comprehensive expertise drives measurable improvements in database reliability and operational excellence in complex environments.