Mervin Alphonse Leon
Data Specialist
2, Varna Way Manor Lakes,Australia
Summary
Experienced data specialist with a robust 14-year background in database administration and data engineering. Skilled in optimizing databases, data migration, and performance tuning, with a proven track record in managing complex projects. Advanced knowledge gained through a master’s in software engineering, emphasizing cloud computing. Seeking to utilize comprehensive skills to facilitate technology advancements in database environments.
Overview
14
14
years of professional experience
3
3
Certificate
Work History
Senior Azure MS SQL Database Administrator
Infosys ltd
Melbourne, Australia
06.2025 - 02.2026
- Migrated databases between different tenancies using Microsoft Azure SQL and PaaS, ensuring seamless transition and minimal downtime.
- Successfully migrated Azure Data Factory project, testing across multiple Azure subscriptions.
- Proactively managed application databases to resolve issues, enhancing operational efficiency for passenger support.
- Facilitated installation and integration of Siebel CRM modules with databases, supporting enhanced data management and user access.
- Implemented RBAC roles tailored to particular needs.
- Developed and deployed reporting queries and stored procedures via GitHub and Azure repository, improving data accessibility for stakeholders.
Application Database Administrator
Avant Mutual
Melbourne, Australia
10.2024 - 05.2025
- Managed application databases to resolve issues and enhance operational efficiency, supporting passenger service delivery.
- Automated database refreshes in Oracle and SQL Server with effective masking and tokenization strategies.
- Executed data engineering projects on Azure Cloud utilizing Data Factory, Data Lake, and Blob Storage services.
- Created data ingestion pipelines in Data Factory, streamlining data storage in OneLake for efficient Power BI visualization in Fabric Domain.
- Implemented data ingestion processes from various formats into Parquet files while ensuring quality.
- Executed data cleanup and ingestion using Python and PySpark SQL within Databricks environments.
- Utilized Azure DevOps to manage tasks, user stories, and repository changes, enhancing collaboration and tracking for database projects.
- Led migration initiatives from SQL-based insurance applications to Microsoft Dynamics platform.
Senior Database Administrator
Melbourne Airport
Melbourne, Australia
10.2023 - 06.2024
- Led the transition of key databases (500GB) from on-premises SQL Server to Azure PaaS SQL, boosting scalability and system performance while cutting infrastructure costs, with zero data loss and downtime.
- Managed Data pipelines in Azure Data Factory as well as Synapse analytics. Also performed database maintenance tasks, such as Always on Availability Groups, advanced backup strategy, and index tuning.
- Ensured stability of SQL Server installations and upgrades through strategic risk management and stakeholder engagement.
Facilitated installation of software releases, patches, and upgrades on production servers as necessary.
Conducted effective change management to minimize business disruptions during updates. - Developed complex T-SQL scripts, enhancing application performance and reducing resource.
- Established role-based access control for cloud and on-premises databases tailored to stakeholder titles.
- Configured Azure Arc to enable access to diverse environments for data engineering purposes.
- Facilitated seamless data migration with always-on functionality from Azure managed instances to on-premises SQL instances, preserving data integrity and reducing downtime for uninterrupted business operations.
Senior Database Developer
Victorian Electoral Commission
Melbourne, Australia
07.2023 - 10.2023
- Managed high availability and disaster recovery strategies to ensure system reliability and business continuity.
- Led data engineering projects utilizing Azure Data Lake and Synapse Analytics for large data set analysis.
- Contributed to election planning by managing data migrations and designing real-time monitoring dashboards.
- Developed Azure Data Factory pipeline with advanced scripts for efficient voter notifications via SMS.
Professional Database Administrator
DXC Technology
Melbourne, Australia
06.2022 - 06.2023
- Orchestrated performance tuning project for healthcare company, optimizing on-premises databases and facilitating migration to Azure using DMS and data pipeline.
- Administered databases to ensure optimal performance and reliability.
- Streamlined data processing and reporting workflows by developing complex T-SQL scripts.
- Collaborated on configuring always-on database mirroring, replication, log shipping, and change data capture to enhance database reliability and availability.
- Constructed and enhanced SSIS packages with ETL tools for data migration and integration, facilitating smooth data flow.
- Developed and deployed Power BI dashboards utilizing Azure cloud data, improving visibility of business metrics and enabling informed decision-making for stakeholders.
- Optimized installation setup and ongoing management of SQL Server Management Studio (SSMS) master data services and quality services.
- Led the transition of key databases of over TB from on-premises SQL Server and performed split Backup restore.
- Facilitated resolution of client issues by leveraging ticket systems such as Rock-solid SQL and ServiceNow.
Database Administrator Developer and Analyst
DCA Limited
Melbourne, Australia
11.2018 - 06.2022
- Led end-to-end Data Engineering projects with Azure Data Lake, BLOB storage, and Synapse Analytics, enabling effective handling and analysis of large data sets.
- This led to scalable data pipelines using TSQL, Python, Pyspark development and Azure functions and enhanced data accessibility, aiding advanced analytics and reporting.
- Streamlined data processing and reporting workflows by developing complex T-SQL scripts and SQL queries.
- Constructed SSIS packages with ETL tools for data migration and integration, facilitating smooth data flow and reducing migration times.
- Developed and deployed front-end reports with Crystal Reports, SSRS, and Power BI, improving data visibility for end users' decision-making.
- Used DevOps tools such as Microsoft Team Foundation, Helix M-control and GitHub for streamlined deployment and coordinated release cycles of CD-CI for consistent software releases.
- Designed a complex data archival system to improve data management and accessibility.
Application and Database Support
Fashion Biz Limited
Melbourne, Australia
06.2017 - 10.2018
- Developed data analysis scripts and optimized stored procedures, enhancing accuracy and delivery speed.
- Utilized Power BI ,SSRS and Phocas for data analysis, increasing operational efficiency report .
- Provided support for Sage Accpac accounting software, resolving issues to enhance data accuracy.
- Led warehouse management system applications, improving integration and performance.
- Strengthened system security through rigorous protocols and effective user access management.
Analyst SQL DBA Level II
Datavail Infotech Limited
INDIA
08.2016 - 02.2017
- Administered SQL Server configurations (2005/2008/2012+) to ensure secure database access through authentication, user creation, permissions management, and role assignments.
- Implemented automated DBA concepts in a 24x7 production setting with regular backup restores using tools like Idera, Redgate, and Fog Lite.
- Coordinated tasks with stakeholders using Service Now to streamline communication and project execution.
Technical Analyst II
Campus Management Corp Limited
INDIA
07.2015 - 06.2016
- Installed and upgraded Talisma CRM to enhance system functionality and improve user experience.
- Automated data migration with SSIS packages and DTS tools for instant record transfer.
- Configured automated data management processes through SSIS package imports to streamline operations.
- Performed functional testing and configured CRM terminologies to align with business needs.
- Managed SQL Profiler traces for performance tuning and rectification of database issues.
- Conducted de-duplication checks during migration to improve data accuracy and reduce manual intervention.
Assistant Manager | Application Support
HDFC Bank Limited
INDIA
09.2013 - 07.2015
- Ensured high availability and reliability for critical banking operations, minimizing downtime in finance and accounting domains.
- Managed complex database systems, facilitating accurate and timely financial data processing.
- Utilized SQL for report generation, data uploads via SFTP, and executing backups to maintain data integrity.
- Performed Windows administration and IIS troubleshooting to maintain system integrity.
Junior SQL Database Administrator
ACS International Limited
INDIA
06.2012 - 08.2013
- Managed SQL Server administration to ensure high availability, effective disaster recovery, and robust security measures.
- Troubleshot and resolve authentication and permission issues by auditing user roles and permissions, ensuring secure access controls.
- Enhanced system security and compliance through implementation of robust protocols and streamlined user access management.
Education
Master of Software Engineering - Advanced Cloud Computing
Torrens University
Melbourne01-2024
Bachelor of Engineering Technology - Information Technology
Mumbai University
Mumbai01-2010
Skills
Databases: SQL Server, Azure SQL DB , Oracle, Snowflakes, PostgreSQL, CosmosDB
High Availability & DR: Always On AGs, Replication, Log Shipping, Mirroring, Backups, Restore, Data Migration
Cloud & Data Engineering: Azure Data Factory, Azure Synapse, Databricks, Data Lake, Fabric, Event Hub, Key Vault, Blob Storage ,One Lake, Data pipeline development
Programming: T‑SQL, Python, PySpark, PowerShell, Power query, DAX, SnowSQL
BI & Reporting: Power BI, SSRS, SSAS, SSIS, Crystal Reports, Yellowfin BI
DevOps & Governance: Azure DevOps, GitHub, CI/CD, RBAC, Security & Compliance, TFS, Helix
Enterprise Application: Siebel CRM, Airport app , Talisma CRM, Duck Creek, Parking Infringement, WMS, Insurance
Domains: Banking, Insurance, Aviation, Government, Logistics, Healthcare, Finance
Knowledge of AI: RAG, Sentiment Analysis, Vector search, Model evaluation , Genetic algorithms , Big data handling training and testing model
Tool: Jira, ServiceNow, RockSolid, Redgate Monitoring , SolarWinds
Certification
• DP-300: Microsoft Certified Azure Database Administrator Associate
• DP-203: Microsoft Certified Azure Data Engineer Associate
• ITIL v3: ITIL Foundation Certificate in IT Service Management
• DP-203: Microsoft Certified Azure Data Engineer Associate
• ITIL v3: ITIL Foundation Certificate in IT Service Management
Work Availability
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Timeline
Senior Azure MS SQL Database Administrator
Infosys ltd
06.2025 - 02.2026
Application Database Administrator
Avant Mutual
10.2024 - 05.2025
Senior Database Administrator
Melbourne Airport
10.2023 - 06.2024
Senior Database Developer
Victorian Electoral Commission
07.2023 - 10.2023
Professional Database Administrator
DXC Technology
06.2022 - 06.2023
Database Administrator Developer and Analyst
DCA Limited
11.2018 - 06.2022
Application and Database Support
Fashion Biz Limited
06.2017 - 10.2018
Analyst SQL DBA Level II
Datavail Infotech Limited
08.2016 - 02.2017
Technical Analyst II
Campus Management Corp Limited
07.2015 - 06.2016
Assistant Manager | Application Support
HDFC Bank Limited
09.2013 - 07.2015
Junior SQL Database Administrator
ACS International Limited
06.2012 - 08.2013
Master of Software Engineering - Advanced Cloud Computing
Torrens University
Bachelor of Engineering Technology - Information Technology
Mumbai University
Work Rights
PR (190 VIC) Full work rights.