MOHAMED AYOUB BEN HALIMA
Senior Oracle Database Administrator
Tunis, Tunisia
--/-www.linkedin.com/in/mohamed-ayoub-ben-halima-36501b20
PROFESSIONAL SUMMARY
Senior Database Administrator with over 15 years of experience managing complex Oracle,
PostgreSQL, and SQL Server database environments, I help organizations ensure the
performance, stability, and security of their critical systems. My expertise includes automating
routine tasks ⎻ reducing manual interventions by more than 60% ⎻ performance optimization,
proactive monitoring, high availability and strengthening security.
My expertise includes database administration and monitoring (RAC and standalone
environments), advanced SQL tuning (rewriting queries, indexing, statistics), and process
automation (archiving, purging, backup management). By reducing manual work by more than
60%, I improve efficiency, minimize downtime, accelerate operations, and improve platform
reliability. With proven achievements in the telecom, banking, and IT services sectors, I also
leverage strong skills in project management, technical audits, and team leadership to deliver
sustainable and measurable results.
CORE SKILLS & TECHNOLOGIES
Databases: Oracle (10g–21c), PostgreSQL (15–17), SQL Server (2019/2022), MySQL
Tools: RMAN, AWR, Data Guard, RAC, Data Pump, OPatch, Cloud Control (12c/13c)
Languages: SQL, PL/SQL, Shell, Python, Java, Spring Boot, Angular, Docker
Expertise: Performance tuning, query optimization, database modeling, automation, High
availability
Systems: Linux (RedHat, CentOS, Ubuntu), Unix (AIX, Solaris), Windows Server
Other: IT Security, Networking, Project Management
PROFESSIONAL EXPERIENCE
Founder & CEO | ADFI NEW TECH | Tunis, Tunisia | 05/2024 – Present
Provided consulting services to clients, ensuring the reliability and optimal performance of
their databases and information systems.
Delivered Oracle DBA and backup consulting at Ooredoo, improving system availability and
strengthening data security.
Designed and deployed automation scripts, increasing operational efficiency and reducing
manual workload by more than 60%.
Managed the IT infrastructure at MITIGAN CIB, ensuring stability and continuous service
delivery.
Maintained and deployed source code updates for the DQM Suite solution, while providing
client support to improve user experience and overall system reliability.
Oracle Database Administrator | NUMERYX | Tunis, Tunisia | 02/2023 – Present
Improved the reliability of Ooredoo’s critical databases, achieving a significant reduction in
downtime and service disruptions.
Automated backup, archiving, and partition management processes, cutting manual
workload by 60% and minimizing human errors.
Optimized slow SQL queries, reducing execution time from over 30 minutes (with crashes)
to under 2 minutes, improving application performance.
Implemented continuous system monitoring, enabling faster issue detection and resolution
to maintain high availability.
Deployed and managed RAC and standalone environments (installation, configuration, and
administration).
Administered PostgreSQL and SQL Server databases, including setup, configuration, tuning,
and security hardening.
IT Manager & Oracle DBA | MITIGAN CIB | Tunis, Tunisia | 08/2018 – 02/2023
Administered databases for Credit Bureau Solution (CBS) ensuring security and high
availability.
Developed and maintained RMAN backup scripts and recovery procedures.
Led IT operations, including network, system, and security management.
Coordinated with external audit specialists to ensure compliance with security standards.
Managed the acceptance and validation of the CBS solution as SPOC with the vendor.
DQM Suite: Managed end-to-end design, development, and deployment of a data quality
solution (deduplication, normalization, cleaning).
Technical Service Manager | Sofrecom | Tunis, Tunisia | 09/2017 – 07/2018
Supported development teams in resolving database performance issues.
Delivered advanced SQL/PLSQL extractions and optimized queries.
Built a microservice for automating data extraction processes.
Software Engineer Specialist (Oracle DBA) | FIS (SUNGARD) | Tunis, Tunisia | 03/2010 –
09/2017
Maintained and optimized operating procedures for the full administration of client
databases.
Administered internal databases across development, pre-production, and production
platforms.
Maintained and redesigned PL/SQL procedures to execute various database actions (table
upgrades, database administration tasks).
Applied and validated corrective patches.
Provided support to clients and developers for SQL query optimization.
Maintained DMSDB (Database Model Management Tool), including the addition of new
features and fixing issues.
Web Applications R&D Engineer | AMD Consulting | Tunis, Tunisia | 07/2009 – 02/2010
Developed and deployed web services for STEG’s ALPHA module automation.
Designed and implemented real estate web portal with CMS customization.
Participated in feasibility analysis, architecture, and project management.
EDUCATION & CERTIFICATIONS
PostgreSQL Administration for Oracle DBA: PostgreSQL databases administration course
UDEMY, 04/2025 - 05/2025
Complete Microsoft SQL Server Database Administration Course: SQL Server databases
administration course
UDEMY, 01/2025 - 04/2025
Oracle Database 12c R2: Clusterware Administration Ed 2 Course: Oracle clusterware
administration course
Oracle (TOD), 02/2019 - 05/2019
Oracle Database 11g Administrator Certified Associate
Oracle, 12/2014
Oracle Certified SQL Expert
Oracle, 12/2012
Engineering studies: Software Engineer
ENIS Sfax, Sfax, 09/2006 - 06/2009
LANGUAGES
Arabic: Native
French: Professional
English: Professional
HOBBIES
Sports (swimming, football, running)
Music
