Senior Database Administrator with 20+ years Oracle/SQL expertise

Osita Unamba

Senior Database Administrator

Glenn Dale, MD 20769 Phone: 301-***-****

Email: ********@*****.***

LinkedIn: https://www.linkedin.com/in/osita-unamba-capm-03636a29

PROFESSIONAL SUMMARY

Senior Database Administrator with over 20 years of experience in Oracle Database Administration, MS SQL Server, and enterprise information systems. Proven expertise in Oracle 12c/19c, GoldenGate, RAC, and Data Guard within hybrid cloud environments. Extensive background supporting Federal Information Systems for the DoD, DHS, DOJ, and FBI. Proficient in applying NIST SP 800-53 controls, STIGs, and achieving Authority to Operate (ATO). U.S. citizen with an active Secret Clearance. Effective communicator and problem-solver, consistently delivering results both independently and as part of collaborative teams. Adapt quickly to new technologies and leverage best practices in database management.

SECURITY CLEARANCE

U.S. Citizen.

Active: SECRET Clearance (DHS)

Inactive: DoD - DIA TS/SCI & CI Polygraph (2013)

EDUCATION

Master of Science (M.S.), Information Technology (Project Management) 2016

University of Maryland University College (UMUC) School of Management and Technology, Adelphi, MD

Bachelor of Science (B.S.), Computer and Information Science 2006

University of Maryland University College (UMUC), Adelphi, MD

CERTIFICATIONS

CompTIA Security+ (Active) 2024

CAPM – Project Management Institute (PMI). 2021

KNOWLEDGE, SKILLS, ABILITIES

Technical Skills

DBA: Oracle (Oracle12c, 19c CDB), MS SQL Server, Oracle Golden Gate, Oracle Data Guard, Oracle RAC, COOP, Backup and Recovery. NoSQL, PostgreSQL, MongoDB. Oracle SQL/PLSQL and SQL

Platforms: On-Prem and Cloud: Microsoft Azure. VMware, AWS

Operating Systems: UNIX/Linux, MS Windows, IBM

Operations: Data Center, Remote DBA, 24x7, Virtual and Collocation Team coordination.

Security / Compliance: TDE Encryptions, CPU/Patches, STIGs, Accreditations (NIST SP 800-53, FISMA, ATO), CIS

Professional Skills

Leadership: Technical Leadership (DBA Lead, Project Coordinator).

Project Management: SDLC Agile and Hybrid Project Methodologies; PMI (PMBOK)

Work Experience

Senior Database Administrator Bluestonelogic LLC / Validatek, Inc. 09/2024 – 01/2026

Client: U.S. Department of Defense (Defense Information Systems Agency (DISA)

Providing database operations and maintenance support for the U.S. DISA PEO Spectrum program on Oracle 19c Golden Gate and Microsoft SQL Server RDBMS platforms, ensuring optimal system performance, data security, and ATO compliance with NIST SP 800-53 (continuous operations (COOP) and High Availability capability).

Key Achievements

Installed and configured database software and applications in a distributed replication environment.

Ensured performance and continuity for Oracle 19c and MS SQL Server.

Conducted risk assessments and addressed security vulnerabilities.

Installed patches and STIGs.

Supported Agile project processes for application deployments.

Troubleshot and optimized system performance and made recommendations.

Implemented backup and recovery procedures.

Environment: Oracle 19c Database and Goldengate replication, MS SQL Server Database / Management Studio, MS Azure Cloud / Windows VM, Teams, SQL Developer, NIST SP 800-53, TDE Encryption, Data Pump, RMAN, Oracle Audit

Database Administration Specialist Accenture Federal Services (AFS) 06/2017 – 03/2024

Administering, developing, testing, and demonstrating databases, as well as performing related functions for government and commercial clients. Designing, implementing, and maintaining new databases. Contributing to the modification of procedures and documentation related to problem resolution and daily maintenance.

Key Accomplishments

Database Administration: Led the upgrade and migration of Oracle databases from 12c to 19c, including OMS Cloud Control, for the Dept of Energy, improving system stability and supportability.

Data Security: Remediated critical security vulnerabilities by applying patches, implementing encryption, and ensuring strict adherence to federal security compliance standards (ATO) for DHS and DOJ systems.

Key Contract Accomplishments

Client: U.S. Dept. of Energy

•Administered Oracle 11g, 12c, 19c CDB, and OMS Cloud Control EM.

•Supported Agile SDLC milestones.

•Migrated databases and upgraded OMS Cloud Control.

•Performed data and code migrations.

•Remediated security vulnerabilities. NIST SP 800-53

•Attended Scrum meetings.

Client: Dupont Dow Corp. (Spin Merge Commercial Project), Delaware

•Provided Oracle DBA to support the global Information Systems consolidation project.

•Installed Oracle database, Data Guard, and Golden Gate

•Supported COTS/SAP ERP integrations

•Managed Data/Code Migrations

•Improved backup efficiencies with RMAN and Azure Cloud

•Led successful Go Live of enterprise systems.

Client: U.S Dept. of Justice (U.S. Marshals Service)

•Led legacy systems modernization.

•Implemented ATO security measures.

•Supported Oracle Database in SDLC.

•Administered Oracle 12c on Linux.

•Managed backups and data migrations.

•Provided 24/7 DBA support.

Environment: Production, QAT, Remote DBA, Windows, VMware, Linux, Oracle 12c,19c, Goldengate, RAC, Data Warehouse, Data Guard, RMAN, DevOps, SAP, SharePoint, NIST SP 800-53. Teams, Onshore/offshore, On-Prem/Cloud Azure, OMS

Client: U.S Dept. of Homeland Security (Customs and Border Protection, CBP) Springfield, Virginia

•Administered Operations and Maintenance of Oracle Exadata Database and Applications

•Implemented ATO security measures, including patches.

•Maintained High-Availability, Backups, and Recovery procedures.

•Provided 24/7 DBA support.

Environment: DHS Data Center, Database Production, Development, and Test Oracle Exadata. NIST SP 800-53

Senior Oracle Database Administrator New York Consulting Inc., New York 2/2017 – 6/2017

Client: U.S. Department of Defense (Naval Research Laboratory – NRL, Washington, DC)

Providing Oracle Database Operations and Maintenance (O&M) for the NRL Project Management Information System (PMIS), continuous availability, security accreditation compliance, performance, and reliability.

Key Achievements

•Installed and configured Oracle databases on Linux and Windows.

•Optimized performance and ensured recoverability.

•Applied patches and enhanced security, achieving ATO.

•Helped define Configuration Management policies.

Environment: Linux, MS VM, Oracle11g, 12c, RAC, Data Guard, EM, RMAN, Data Pump, CPU patches, DISA STIGs

Principal Database Security Consultant INSIGHT GLOBAL INC., Virginia 4/2015 – 2/2016

Client: The U.S. Patent and Trademark Office (USPTO), Virginia

Identify Oracle Database vulnerabilities, recommend fixes, and reduce POAMs. Ensure compliance with the CIS Benchmark and FISMA Standards.

Key Achievements

Provided Database SME support to a Cybersecurity Team.

Remediated critical database vulnerabilities and closed outstanding POAMs.

Analyzed Oracle Database risks and developed remediation solutions.

Created new USPTO Oracle Database Patch Management Policy.

Established CIS Oracle Database Secure Configuration Baseline.

Enforced database hardening with CPU patches.

Environment: Linux, Oracle11g /12c, Cybersecurity Assessment, Remediation, NIST SP 800-53 DISA STIGs, Accreditations, CIS

Senior Database Administrator (Oracle DBA) Northrop Grumman Corp., Virginia 3/2011 – 12/2013

Client: U.S. Department of Defense, Washington, DC (DIA) (TS/SCI/CI Polygraph)

Managing database operations and maintenance for the Defense Intelligence Agency (DIA) on Oracle and Linux. Ensure high availability, data security, and compliance with DISA standards while documenting procedures and recommending performance best practices.

Key Achievements

•Installed and migrated Oracle 11g/12c RAC on UNIX.

•Implemented TDE for Oracle 11g.

•Created SOP/SIP for RAC.

•Enabled inter-agency data sharing.

•Strengthened security with hardening and Data Guard.

•Mitigated security vulnerabilities and secured ATO.

•Facilitated Oracle Database platform migration and relocation to the new DIA facility.

Environment: Linux, Oracle11g RAC, Data Guard, SAN RAID, RMAN, Oracle CPU/IAVA patches, DISA STIGs, ATO

Oracle Database SME IDS Technologies Inc., Maryland (Self-Employed) 02/2009 – 07/2010

Client: U.S. Department of Defense, Joint Chiefs of Staff OCIO - Pentagon - TS/SCI Clearance

Providing Oracle Database expertise and software engineering best practices to enhance Information and Communications Systems for the OCIO Computer Engineering Laboratory. Evaluating software quality assurance before acquisition and deployment.

Key Achievements

Configured Oracle 10g databases on various platforms.

Ensured database security compliance with DoD standards.

Created SOPs and installation guidelines.

Managed change control.

Applied CPU patches for security. NIST SP 800-53.

Environment: UNIX, IBM, Oracle9i, 10g, RAC, VMWare, CPU/IAVA patches, STIGs, Accreditations, ATO

Senior Oracle Database Administrator (Oracle DBA) Saic Corporation, Annapolis, Maryland 3/2008 – 12/2009

Client: U.S. Federal Bureau of Investigation (FBI) HQ, Washington, D.C. - TS/SCI Clearance

Supporting O&M of large-scale information management systems on Oracle Data Warehouse and RAC, ensuring high availability, COOP/DR capabilities, and security compliance.

Key Achievements

•Installed Oracle10g RAC on Linux.

•Integrated ArcSight and Tripwire for security.

•Retired Oracle9i Database to reduce costs.

•Developed backup and recovery strategies using RMAN.

•Applied CPU and STIGS to address vulnerabilities.

•Supported database development and ETL processes.

Environment: UNIX/Solaris, Oracle 10g Data Warehouse, RAC, ASM, CPU Patches, STIGs, ArcSight, Tripwire, (Informatica BI) Analytics and ETL

Key Recognitions and Awards

Northrop Grumman: Oracle DBA services for the U.S. Defense Intelligence Agency (2013).

Lockheed Martin: Oracle DBA services for the U.S. DoD Data Center (2004).

U.S. Department of State: IBM DB2 Y2K compliance (2000).

U.S. Department of State: IBM Mainframe DB2 modernization (1999).

IBM: Data center consolidation leadership (1995).

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