Senior Database Administrator (Oracle EBS & Multi-Platform)

Sanmina-SCI Systems de México; Huntsville (AL); On-site; USD 110,000 - 160,000; Full time

Job summary

Sanmina seeks a Senior Database Administrator to safeguard and optimize our Oracle EBS 11i and Oracle Database infrastructure in a strict change-freeze environment. You will focus on compensating controls, network isolation, and real-time monitoring.

The role requires 5–7 years of enterprise DBA experience with strong Oracle EBS expertise and collaboration with DevOps and security teams. You will also support MySQL, PostgreSQL, and MS SQL Server as needed.

Qualifications

• Bachelor’s degree in Computer Science, IT, or related field (or equivalent).
• 5–7 years of enterprise DBA experience required.

Responsibilities

• Legacy Environments: Enforce security postures for non-patchable systems via virtual patching and host-level controls.
• Network Isolation: Maintain strict network segregation restricting DB access to authorized app servers and jump boxes.
• Auditing: Implement deep database auditing for SYS, SYSTEM, and APPS to detect anomalies in real time.
• EBS 11i Maintenance: Troubleshoot, clone, and support DB backends with zero disruption to legacy code.
• Performance: Tune complex SQL/PL-SQL and optimize indexes and query plans.
• High Availability & Recovery: Maintain backup strategies (RMAN) and DR plans.

Skills

Oracle EBS

Database security

SQL tuning

Shell scripting

Python scripting

Education

Bachelor's degree in Computer Science or related field

Equivalent professional experience

Tools

Oracle EBS 11i

Oracle Database

MySQL

PostgreSQL

MS SQL Server

Job description

Senior Database Administrator (Oracle EBS & Multi-Platform)

Role Overview

As a Senior Database Administrator, you will serve as the primary technical expert responsible for the stability, optimization, and security of our core Oracle Database infrastructure and our Oracle E-Business Suite (EBS) 11i legacy environment.

Because this enterprise environment operates under strict change-freeze and non-patching constraints, you will focus heavily on compensating security controls, network isolation, and proactive mitigation to protect vulnerable systems without altering core database code. While Oracle EBS and Oracle Database administration are the primary requirements for this role, additional experience managing MySQL, PostgreSQL, and MS SQL Server is a highly valued asset.

Core Responsibilities

Primary Focus: Oracle EBS 11i & Oracle Database Administration

• Legacy Environments & Compensating Security: Enforce strict security postures for non-patchable systems (e.g., Oracle EBS 11i) through virtual patching, database firewalls, and host-level security configurations.

• Network Isolation: Architect and maintain tight network segregation, ensuring Oracle database access is strictly restricted to authorized application servers and admin jump boxes.

• Advanced Monitoring & Auditing: Implement and oversee deep database auditing (monitoring SYS, SYSTEM, and APPS accounts) to detect and alert on anomalous activity or exploit attempts in real time.

• EBS 11i Maintenance: Troubleshoot, clone, and support the database backend for Oracle EBS 11i environments while ensuring absolute stability and zero disruption to legacy custom code.

• Performance & Query Tuning: Monitor system health, code complex SQL/PL-SQL queries, and optimize index structures and query plans to maximize speed without relying on version upgrades.

• High Availability & Recovery: Maintain, document, and test rigorous backup strategies (e.g., Oracle RMAN) and disaster recovery (DR) plans to ensure rapid recovery options.

Plus Requirement: Multi-Platform Operations

• Cross-Platform Support: Provide secondary administrative support, general maintenance, and basic troubleshooting for MySQL, PostgreSQL, and MS SQL Server environments as required.

Strategic Planning & Collaboration

• Risk Advisory: Serve as the subject matter expert to management on the security risks of legacy infrastructure, presenting technical recommendations for future modernization or safe migration paths.

• Cross-Functional Collaboration: Partner with developers, DevOps, and functional analysts to support infrastructure changes within a highly controlled environment.

Job Requirements

Eligibility Requirement

• Citizenship: Must be a U.S. citizen (due to compliance/security requirements).

Education & Experience

• Education: Bachelor’s degree in Computer Science, Information Technology, or a related field (or equivalent professional experience).

• Experience: Minimum of 5–7 years of experience as a Database Administrator working in enterprise environments.

Technical Skills & Expertise (Required)

• Oracle EBS Expertise: Deep administrative experience with Oracle EBS 11i (architecture, concurrent managers, cloning) and older Oracle database versions.

• Database Security Hardening: Proven experience securing databases using alternative methods when patching is not permitted (e.g., Database Firewalls, native auditing, network ACLs).

• Optimization & Scripting: Expert-level knowledge of advanced SQL, PL/SQL tuning, and Shell/Python scripting for automation.

Technical Skills & Expertise (Highly Valued Pluses)

General hands-on experience or familiarity with secondary database platforms:

• MySQL

• PostgreSQL

• MS SQL Server

Soft Skills & Professional Attributes

• Strong analytical, troubleshooting, and legacy-system debugging skills under tight constraints.

• Excellent communication skills to articulate security risks and technical constraints clearly to both technical teams and leadership.

Preferred Qualifications

• Experience planning migration paths from legacy systems (like EBS 11i) to modern cloud or hybrid infrastructures (AWS, Azure, GCP).

• Certifications in Database Security or platform-specific credentials (e.g., Oracle Certified Professional).

Sanmina is an Equal Opportunity Employer – M/F/Veteran/Disability/Sexual Orientation/Gender Identity.

This is an ITAR facility and applicants must be a US Citizen.