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jarwarsajjad12

Sajjad Ahmed

@jarwarsajjad12

Expert Cybersecurity Solutions and Support for your Oracle Infrastruct

United Kingdom
English
About me
I'm Sajjad, providing support as a freelance Technical and Cybersecurity Consultant at Fiverr, including expertise in Oracle Database Administration, Oracle Utilities Application(MDM, OUA, C2M, and CC&B), Red Hat Enterprise Linux Operating systems and Middleware Administration(Weblogic), Cybersecurity SIEM, Wazuh, Elasticsearch, Kibana, and Penetration testing. I have more than 4 years of experience providing support for small, medium, and large companies for their mission-critical support.... Read more

Skills

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jarwarsajjad12
Sajjad Ahmed
Offline • 
Average response time: 1 hour

See my services

Support & IT
I will support install oracle database ha services your remote dba
From$15 / projectMore details

Work experience

Upwork

Technical and Cyber security Consultant

Upwork • Self-employed

Nov 2023 - Present • 2 yrs 7 mos

I provide specialised database, middleware, and cloud support services to international clients across diverse industries. My work includes installation, configuration, migration, and administration of Oracle databases and enterprise applications in both Windows and Linux environments. I have successfully implemented Oracle E-Business Suite installations, Oracle APEX migrations from Express Edition to Enterprise Edition, and provided ongoing support for Oracle Forms and Reports in Windows Server environments. In addition to database and ERP support, I have delivered cloud and security-focused solutions, including the design and deployment of a Wazuh-based security monitoring infrastructure across multi-server environments. This involved configuring Wazuh, Elasticsearch, Kibana, and Filebeat, deploying agents on over 20 servers, and implementing centralized log monitoring and real-time alerting. I have also developed API integrations with billing systems, automated processes using PowerShell scripting, and supported hybrid environments combining Ubuntu, CentOS, and cloud platforms.

Technical Consultant

MRP Elite Private Limited • Full-time

May 2021 - Jul 2024 • 3 yrs 2 mos

I was responsible for delivering enterprise-level database and application solutions across large-scale environments. I worked extensively on Oracle-based systems, including Oracle Database 11g, 12c, and 19c, Oracle Real Application Cluster (RAC), Data Guard, GoldenGate, and Oracle Enterprise Manager. My role involved installation, configuration, upgrades, migrations, patch management, performance tuning, and ongoing production support for mission-critical environments. One of my key projects was supporting and upgrading Oracle Utilities and MDMS environments at K-Electric Pakistan, where I managed complex production systems exceeding 70TB, along with UAT and development environments. I implemented database compression, Information Lifecycle Management (ILM), backup strategies using RMAN and Data Pump, and provided SLA-based support for both Oracle and SQL Server databases. I also worked on environment replication, disaster recovery configurations, and performance optimization to ensure system stability and high availability. In addition to database administration, I supported Oracle Fusion Middleware, WebLogic, Oracle Forms and Reports, and enterprise application deployments across Windows and Linux environments. I contributed to ERP migrations, UAT environment setup, infrastructure design, and integration support for organisations including Habib Bank Limited, Tanzania Revenue Authority, Civil Aviation Karachi, and international clients. My role required strong troubleshooting skills, structured problem-solving, and the ability to manage complex on-prem enterprise environments with limited documentation.