Sadiqur Rahman

Apps DBA and multi-cloud engineer in Dhaka. I run Oracle EBS R12.2, RAC and APEX/ORDS in production, from provisioning to disaster recovery.

Read the blog Documents

$ crsctl check cluster -all

racnode1:

CRS-4537: Cluster Ready Services is online

CRS-4529: Cluster Synchronization Services is online

racnode2:

CRS-4537: Cluster Ready Services is online

CRS-4529: Cluster Synchronization Services is online

$ srvctl status database -d racdb

Instance racdb1 is running on node racnode1

Instance racdb2 is running on node racnode2

About

I own Oracle environments end to end: Apps DBA, cloud and APEX/ORDS administration, with no dependency on an outside team. My work spans EBS cloning and upgrades, database version upgrades with AutoUpgrade, RMAN recovery, Data Guard, and OCI networking.

B.Sc. in Computer Science and Engineering, Daffodil International University. I work in English and Bangla.

4.5+years in IT and Oracle

12c–26aiOracle DB versions administered

3clouds: OCI, AWS, Azure

Experience

DBA / AppsDBA / Cloud DBA / System Engineer

SoftomaticBD, Dhaka · Nov 2023 to present

Own Oracle EBS R12.2 production across multi-server, split application and database tiers.
Completed the Oracle EBS upgrade from 12.2.9 to 12.2.15 (October 2026) through AD/TXK Delta and adop online patching cycles.
Upgrade databases from 19c to 26ai with AutoUpgrade; administer 19c CDB/PDB, tuning and DR readiness.
Build Oracle RAC 19c (ASM, SCAN, private interconnect) on OCI and VMware ESXi.
Design DR with Data Guard and recover with RMAN and controlfile techniques.
Deploy APEX 22–26 and ORDS 21–26 on Tomcat 9 and 10 behind an nginx reverse proxy.
Configure OCI DRG, RPC, cross-region VCN peering, cross-tenancy IAM and Block Volume backup replication.

Executive ICT

Saad Group, Dhaka · Feb 2022 to Oct 2023

Delivered end-to-end ICT support across departments, covering hardware, software, networking and user account management.
Administered internal servers and the helpdesk, including application installation and maintenance.
Managed DNS, domain configuration and peripheral devices across company branches.