SUMMARY:

Accomplished and resourceful professional with 25+ years of experience in Oracle database engineering, administration, design, and development; three years in Big Data technology.

TECHNICAL SKILLS AND EXPERTISE:

• Highly proficient in database clustering
• Oracle SPARC SuperCluster T4 - 4 and Exadata Database Machine
• Oracle Real Application Cluster (12c, 11g, 10g, 9i)
• Hadoop Clusters (Cloudera Distribution for Hadoop ( Confidential ) 4.x, 5.x)
• Extensive experience in database installation, upgrade, and migration
• Oracle database upgrade and patching with near zero downtime
• Data center relocation and technology refresh of database server
• Expert at troubleshooting and performance tuning
• Investigation of system resource contention
• Diagnostics of I/O and network bottlenecks
• Proactive database configuration and optimization to eliminate performance risk
• Technical excellence in high availability solutions
• Oracle Data Guard, backup and disaster recovery

PROFESSIONAL EXPERIENCE:

Independent Contractor

Confidential, Vienna, VA

Responsibilities:

• Responsible for upgrading and patching 12c RAC databases on Oracle engineered systems (Supercluster and Exadata). Implemented a rolling upgrade approach using (transient) logical standby to achieve near zero downtime for 12.2 RAC upgrade.
• Manage databases in production, QA, and development environments. The case management database is over 20 terabytes.

Confidential, McLean/Vienna, VA

Database engineer

Responsibilities:

• Responsible for a big data analytics project including hardware/software selection, implementation of three 13-node Hadoop clusters.
• Provided engineering support to data scientists including Hive, Impala, Ozzie, Sqoop, Spark, and Hue.
• Implemented Hadoop Security using Cloudera Manager.
• Installed and upgraded Cloudera Manager and Confidential .
• Led a technology-refresh project that upgraded all environments to Oracle 12c, Linux 6, newer Dell bare metal machines, and jumbo frames on network interface 10GbE.
• Developed silent install scripts and step-by-step instructions for database administrators to install, configure, patch, and upgrade Oracle RAC database to 12c.
• Integrated high availability best practices into every aspect of system architecture to avoid single point of failure including fully redundant network switches and bonding network interfaces.
• Relocated all Oracle database servers to a new data center using Oracle Data Guard and NetApp SnapMirror to minimize the down time.
• Measured and established a network performance baseline including TCP and UDP for Oracle RAC interconnect and storage network.
• Responsible for migrating all Oracle databases from Sun SPARC to Linux using Transportable Tablespaces.
• Conducted research and development of running Oracle RAC in virtualization including Citrix Xen, Oracle VM VirtualBox, and VMware. Also evaluated shared storage options when installing Oracle RAC, including NFS, iSCSI/ASM, and OCFS2.

Confidential, Bethesda, MD

Database Administrator

Responsibilities:

• Senior member of the Confidential DBA team administering Oracle Production and Test databases configured with RAC on Sun E15K and EMC SAN for Confidential and Transportation Security Administration ( Confidential ).
• Deployed Oracle 11i CRM, Portal, HTML DB, and J2EE applications on Oracle 10g AS.
• Achieved data import from the staging server to Production without disrupting the application workload using Oracle transportable tablespace, during a major migration of Oracle 11i CRM from 11.5.8 to 11.5.10.Created a Logical Standby database for reporting of Confidential Online Training Center (OLC) application to reduce the primary database workload.
• Seamlessly migrated 30 airports’ staff scheduling data into Confidential ’s central hosting database.

Oracle DBA Instructor

Confidential, Woodbridge, VA

Responsibilities:

• Taught database administration classes in Oracle Professional Certificates Program for 8 years.
• Delivered lectures and provided hands-on lab exercises, enabling students to pass Confidential exams.