Employment History
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Technical Professional / Field Engineer
US Well Services | San Angelo, Texas
March 2019 - Present
• Helped generate $6+ million/year revenue by providing mechanical, software, and logging services on Frac SITE.
• SSRS services to extract and migrate information to determine client system limitations for capacity and load for oil and energy data processing projects.
• Mentored 10+ field engineers/year to operate Frac equipment and data measurement tools to ensure safety and optimal efficiency.
• Spearheaded development and implementation of business intelligence architecture to deliver end-to-end BI solutions.
• Specified user access levels for each database segment to protect database integrity and company information.
• Administered, supported, and strictly monitored databases to quickly resolve problems with Microsoft Visual Studio and SQL servers. -
SQL Server BI/SSIS/SSRS Developer
Pact international. – Kigali, Rwanda
June 2008 - May 2012
• Analyzed source system data to determine the data model and ETL solution that will meet business requirements.
• Formulated and documented the physical ETL process design based on business requirements and system specifications, including source to target mappings, transformations, lookups, aggregations and expressions.
• Created complex SSIS packages using various transformations and tasks like Sequence Containers, Script, For loop and ForEach Loop Container, Execute SQL/Package, Send Mail, File System, Conditional Split, Data Conversion, Derived Column, Lookup, Merge Join, Union All, flat file source and destination, OLE DB source and destination, excel source and destination etc.
• Write Stored Procedures to populate various dimensional tables and the fact tables for the Data Warehouse.
• Created, Process, Partitioned the cubes using SSAS.
• Created various Stored Procedures to validate the data from the source and update/insert the records into target tables.
• Query Optimization and Performance Tuning of Stored Procedures using SQL Profiler and Estimated Query plans.
• Work closely with Report analysts and operation staff for support in problem resolution and root cause analysis.
• Created/monitored scheduled data warehouse jobs using SQL Server Agent jobs.
• Worked with users and business analysts to design and develop tabular, matrix, gauges, Charts, drill down interactive reports. -
Field Engineer
CUDD Energy services | Odessa, Texas
December 2016 - February 2019
• Analyzed seven wells for H2S pipe corrosion to determine field trend and used results to recommend surface casing pipe selections for future wells, resulting in cost savings of $40,000 per well.
• Diagnosed well problems and provided recommendation to improve oil well performance by stimulating the well, optimizing electrical submersible pump, and artificial lift to improve the well performance.
• Contributed to a 35% reporting decrease for all health, safety, and environmental incidents by implementing behavior-based safety practices.
Digital Credentials
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ROGER WILLIAM TCHEGUI DONFACK
See Credential