Sachin Tiwari
Mumbai
Summary
Dynamic Advanced Service Engineer with extensive experience at Oracle India Pvt. Ltd., excelling in Oracle database management and performance tuning. Achieved a remarkable 40% reduction in query execution time while ensuring 99.99% uptime across 40+ databases. Proficient in RMAN, Data Guard, and automation, complemented by strong problem-solving skills.
Overview
7
7
years of professional experience
1
1
Certification
Work History
Advanced Service Engineer
Oracle India Pvt. Ltd.
Mumbai
08.2024 - 10.2025
- Provided 24×7 DBA support for production and DR databases.
- Performed RMAN backups, DR sync monitoring, and flashback recovery.
- Applied quarterly patches on RAC and standalone DBs.
- Tuned SQL performance and improved query response times.
- Supported DR drills and performed switchover/switchback operations.
- Managed incident, service, and change requests via SMAX tool.
- Managed and monitored 40+ production and DR databases ensuring 99.99% uptime.
- Optimized SQL performance and reduced query execution time by up to 40%.
- Client: Indian Bank
Senior Oracle DBA
Clover Infotech Pvt. Ltd.
Mumbai
04.2019 - 07.2024
- Administered RAC and non-RAC databases in production and DR setups.
- Managed RMAN, Data Pump (EXPDP/IMPDP), and cloning operations.
- Implemented and maintained Data Guard environments.
- Applied quarterly patches and upgrades (11g → 19c).
- Performed performance tuning, EOD & Flash operations.
- Automated routine DBA tasks using shell scripting.
- Handled user management, tablespace growth, and ASM disk additions.
- Clients: Axis Bank, Bajaj Finserv, Mirae Asset, Pidilite, USGI
Education
M.Sc. - Information Technology
MCC College
Mumbai01.2020
B.Sc. - Computer Science
Ratnam College
Mumbai01.2017
Skills
- Oracle database management (11g, 12c, 19c)
- RMAN and Data Pump
- AWR and ADDM
- OEM (12c and 13c)
- SQL and PL/SQL
- RAC and Data Guard
- ASM management
- Upgrade and patching
- Linux, Windows and AIX
- Performance tuning
- Shell scripting automation
Certification
- Oracle Database Administration 19c Certified Professional (OCP)
- Oracle Cloud Infrastructure 2025 Certified AI Foundations Associate
- Oracle Cloud Infrastructure 2025 Certified Foundations Associate
Soft Skills
- Analytical thinker
- Self-motivated
- Team player
- Effective communicator
Languages
Hindi
First Language
English
Proficient (C2)
C2
Timeline
Advanced Service Engineer
Oracle India Pvt. Ltd.
08.2024 - 10.2025
Senior Oracle DBA
Clover Infotech Pvt. Ltd.
04.2019 - 07.2024
M.Sc. - Information Technology
MCC College
B.Sc. - Computer Science
Ratnam College