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- 1. Guheng (Gordon) Xu 5120 Doyle Lane, Centreville VA 20120 guheng@hotmail.com 703-774-6718 C OBJECTIVE: Continue my career as a senior level Database Administrator utilizing my strong technical and interpersonal skills in a challenging and mission critical environment. SUMMARY of QUALIFICATIONS: • Over 18 years of experience in data management and system administration projects, administration and maintenance of Oracle database on different platforms; • Skilled in designing and implementing complete life cycle OLTP, OLAP and ETL applications with various development tools and languages. • In-depth understanding of security and backup/recovery procedures to ensure database integrity. • Oracle export level certificates, Certificates for DOD Classified System Access CERTIFICATIONS ORACLE Database 12c and 11g Administrator Certified Professional (OCP) Oracle Certified Export, RAC 11g and Grid Infrastructure Admin Oracle IT Architecture Certified Specialist Oracle Database SQL Certified Expert Oracle Certified Export, 11g Performance Tuning Oracle Certified Associate, Oracle Solaris 10 Operating System (SCSAS) Oracle Linux Certified Implementation Specialist Comp TIA Security + Certified PROFESSIONAL EXPERIENCE Senior Database Administrator/Lead Consultant, CACI (active Security Clearance) 4/2008 – present • Provided 24x7 supports for Arm production classified and unclassified databases. Performed troubleshooting for unforeseen problems. Performed routine database monitoring tasks such as monitoring of database locks, log files, space, and availability; planned and implemented database backup as well as recovery with flashback. • Managed DBA team and generated DBA manuals, standard operating procedures (SOPs), as well as migration, upgrade, administration, and operation standards and reports for client executives. • Led the Oracle 11g Real Application Cluster (RAC)/DG (Data Guard) database planning for client • Oracle Active DG migration project; planned, configured, installed and administrated Oracle 11g Grid Infrastructure (GI), ASM, RDBMS software and databases on Linux/Solaris. Migrated database from Solaris platform to Linux
- 2. Guheng (Gordon) Xu 5120 Doyle Lane, Centreville VA 20120 guheng@hotmail.com 703-774-6718 C • Evaluated Data Guard configuration. Configured RMAN backup and Symantec Networker backups on databases (production hot backup and dev/test weekly cold backups) and schema logical backups. Performed database disaster recovery (switch over and failover) and restored database from backups per customer’s requests. • Performed day-to-day monitoring, management, provisioning, and support on all single instance and RAC databases; monitored synchronization of primary and standby databases; provided day-to-day support for all database infrastructure components, including periodic production database performance troubleshooting and tuning of dev/test database operations, especially on case management applications; upgraded Oracle database from 11g release 11.1.0 to release 11.2.0.3. STIG deployment. • Developed and maintained Army enterprise data models, integrated with other sub models from SQL Server. • Provided Technical Assessment on Change Requests (CRs). Requests from Army agencies and generated implementation plan and transmittals for dev/test and production environments. Evaluates program needs to determine necessary modifications and recommended upgrades to existing systems and guidelines. • Provided technical consultation on database development of the integration project, which included using SQL Server to design and develop ETL batch jobs and providing recommendations on database storage capacity and application server configuration. Sr. Database Administrator/Lead Consultant FannieMae/VeriSign/Nextel/NameTree/USAID 5/1999 - 3/2008 • Installed, configured and maintained multiple large production databases in Sun Solaris UNIX environment; applied CPU/PSU and other patches; maintained security audit compliance. • Responsible for multiple large development database support activities, such as monitoring alert logs, listener logs, redo logs, rollback segment size, extent size, trace files, user session status, free space in tablespaces, fragmented free space, and object modifications. Reporting with MySql. • Installed, configured and maintained testing and development databases. Used the OEM to create database baselines, compared database structure across production, and development environments. • Optimized Oracle and SQL Server databases. Diagnosed various common database issues and provided solutions. • Conducted logical/physical modeling and table partitioning; ERWIN, OWB/ETL. Performed contingency/disaster recovery planning. • Led Oracle 9i upgrade project; Generated an upgrade strategy at enterprise level and developed standard upgrade procedures; migrated and upgraded database from 8i to 9i; converted database character set from West European to Unicode (UTF8) for informational database.
- 3. Guheng (Gordon) Xu 5120 Doyle Lane, Centreville VA 20120 guheng@hotmail.com 703-774-6718 C • USAID financial production database support/migration: information systems lifecycle management methodology becoming a Level 2 CMM. • Monitored and troubleshoot USAID replication system in 40 sites; Evaluation and selection of data management tools. Developed web interfaces and reports with Oracle webdb2.1 for a DW Senior DBA, Lead Consultant, GlobalOne/UUNet contract 6/98-5/99 • Used E-R model CASE tool ERWIN 3.5.2 and transformed Case Model to Data Model . Reengineering UUNet network configuration database NPI. • Designed and coded stored procedures, functions and triggers for the NPI databases. Designed LOIS Distributed and advanced replication system. • Designed Enterprise Database Architecture and DSS/Data warehouse. Analyzed query statistics generated by TKPROF to trace any long-running queries and took necessary steps to resolve any related problems. • Administered Oracle tablespace settings, rollback segments; monitored disk I/O and fragmentation, monitored the system using available utilities to determine the worst users of the system, monitored CPU load, identified CPU bottlenecks. • Developed and maintained logical and physical data model, update models to reflect changes in business requirements, data marts. • Involved in development of web-based online applications. SYSBASE, SQL SERVER, My SQL, ERWIN, DESIGN 2000, Rational Rose Database Analyst/DBA, Database Team Leader, CACI/HCI NAVY and DOT (Dept. of Treasure) contract 1/96-6/98 • Performed Database modeling for NIFMS/NIMMS project, a management/logistic software-reengineering project for the Navy. The system was designed to improve core functionality of the NAVYAIR Industrial Financial and Material Management Systems Reengineering database. • Migrated legacy IBM database to Oracle 7i database; installed and configured Oracle software. Rational Rose. • Logical and physical data modeling with Erwin and DBA support in DB2 for Grand Treasury Offset Program (GTOP) System for DOT. EDUCATION Ph.D. in Engineering, Tongji University, China 1992 ME,BE, in Engineering, Nanjing Institute of Technology, China Certificates for Classified System Access:
- 4. Guheng (Gordon) Xu 5120 Doyle Lane, Centreville VA 20120 guheng@hotmail.com 703-774-6718 C Original Classification Course, Defense Security Service, 9/20/2013 Derivative Classification, Defense Security Service, 9/20/2013 Introduction to Information Security, Defense Security Service, 9/21/2013 Security Classification Guidance, Defense Security Service, 9/27/2013 Marking Classified Information, Defense Security Service, 9/20/2013 Unauthorized Disclosures of Classified Information, Defense Security Service, 9/10/2013 Certificates of Trainings from Department of the Army: Information Assurance Fundamentals formerly known as the (IASO) Annual DOD Cyber Awareness Challenge Exam WNSF – Phishing Awareness; Portable Electronic Devices; Personally Identifiable Info TECHNICAL REPORTS AND PUBLICATION: RMAN Applications in VIS, VeriSign, 06/2006 Web Data Mart Data Architecture Design, 07/02 NameTree DNS Data Architecture, 01/01 Customer Database Physical Model, UUNet, 4/2000 LOIS Migration Solution, GlobalOne, 3/99 Enterprise Model Solution, UUNet, 9/98 NIFMS/NIMMS Database Subject Area Model Design, Project Presentation, CACI 10/97 Grand Treasury Offset Program (GTOP) Data Model Design, HCI 5/97