Daniel Sierra

Oracle DBA Developer @dsjomad

Data EngineerDBA / Developer✔️ ITBackend DeveloperComputer engineer🧑‍🔬 Engineer🧨 Consulting

Daniel Sierra is an accomplished Oracle DBA Developer with a proven track record of maintaining and improving Oracle databases. He possesses strong skills in database architecture, SQL, PL/SQL, and performance tuning. His responsibilities include ensuring the availability, performance, security, and redundancy of databases, as well as planning and implementing backup and recovery strategies. Daniel Sierra is also proficient in troubleshooting and resolving database issues, managing database changes, and coordinating with application development teams. His strong analytical skills, attention to detail, and ability to work in a fast-paced environment make him a valuable asset.

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Work Background

DSJOMADCloud Solutions & Database Administration

Jan. 2024

Ellucian - Cloud ServicesSenior Cloud Application Administrator

Apr. 2020

EllucianSenior Banner DBA Consultant

Jun. 2014 - Apr. 2020Remote Oracle DBA for multiple clients in the US and Canada • Installation, Migration, Upgrade Oracle 11g, 12c databases - Container (CDB), non-CDB, Pluggable (PDB) • Transparent Data Encryption for Oracle 11g / 12c databases • Oracle Audit Vault Installation and Configuration • Oracle Database Firewall Installation and Configuration • Database SQL / Performance Tuning Banner Application DBA • ESM, Tomcat, WebLogic, Automic (UC4, AppWorx), Banner 9 - Installation, Upgrade, Configuration • Automic Training instructor

Texas A&M UniversitySenior EIS Database Administrator

Oct. 2012 - Jun. 2014• Database Administration for multiple Oracle 11g databases and WebLogic Middleware servers • Create and manage physical standby databases via RMAN and EM • Perform Oracle Database Patches and Upgrades • Perform WebLogic Middleware Patches and Upgrades • Ellucian / Banner application for Admissions, Records, A/R, and Financial Aid • Perform Banner Software Patches and Upgrades • Promote custom PL/SQL code to production. • PL/SQL query tuning & optimization. • Oracle 10g, 11g, +ASM, Dataguard, Solaris UNIX and Linux environment.

Texas A&M UniversityLead Software Application Developer

Aug. 2008 - Sep. 2012• Manage Operational Data Store for implementation of SunGard / Banner System for Admissions and Records. • Create ETL mappings for loading data from change tables into the ODS for Standard Reporting. • Develop PL/SQL Packages, Procedures, Functions used in Data Warehouse report generation. • Oracle Warehouse Builder, AppWorx, Argos, ePrint, FormFusion • Oracle Forms development.

Valtech TechnologiesConsultant

Jul. 2006 - Aug. 2008• Configuration \ Build \ Release Engineer for a distributed team of 45 in a multi-million dollar contract to produce a student loan application for clients located in two states. • On-site web application consultant for a large Hedge Fund Company. Created application solutions in C#, ASP.NET and SQL Server 2005/2008 providing status reports / knowledge transfer to project manager.

Texas A&M UniversityLead Software Applications Developer

Jan. 2006 - Jul. 2006• ASP.NET, C#, SQL Server project to create Student Information System. Database design, business logic and user interface. • Developed EDI to XML ETL for ApplyTexas.

Al-Razaq Computing ServicesSQL Developer

Aug. 2005 - Jan. 2006Lead the analysis, design, and implementation of a C#, ASP.NET, SQL Server application to calculate energy consumption for the entire Texas A&M University campus. Designed, coded and delivered application to calculate University energy consumption by department. - Worked with business analysts to derive formulas to correctly bill each department. - Made data accessible to campus officials via energy consumption intranet site.

W.L. Gore & AssociatesIT Developer

Jan. 2003 - Jul. 2005Design, implementation and maintenance of Oracle 9i Data Warehouse software applications and Oracle reports for international sales division of Gore Medical Products. ASP.NET, C#/VB.NET, SourceSafe, PL/SQL packages, procedures, functions, triggers.

Arizona Attorney General's OfficeOracle Developer / DBA

Sep. 2001 - Jan. 2003• Lead a team to develop an HR application and reporting system for tracking and archiving employment applications. • Gathered requirements, produced design and system analysis documentation. • PL/SQL Oracle Forms and Reports. • Oracle 8i Database Administration • Backup and Recovery • PL/SQL query tuning & optimization.

Qwest CommunicationsDBA Design Engineer II

Nov. 1999 - Sep. 2001• Oracle Database design, implementation and maintenance for Video / DSL service. • Oracle Database Administration of Data Warehouse. • Backup and Recovery • PL/SQL query tuning & optimization.