Role Description Diné Source is seeking an expert Senior Database Modeler to design, implement, and maintain the highly secure Oracle database environment. The ideal candidate will be a subject matter expert in advanced Oracle security features and will be responsible for translating stringent Zero Trust and IL5 security requirements into a robust, scalable, and enforceable database architecture. You will be the primary steward of the database schema and its underlying security model, ensuring data is protected at every layer through sophisticated access controls and encryption. - Design, implement, and manage the logical and physical data models for the Oracle schema, ensuring alignment with strict security and performance requirements. - Serve as the technical lead for implementing and enforcing multi-layered database security controls, with a primary focus on Oracle Label Security (OLS) and Oracle Database Vault (DV). - Develop and maintain a secure data access layer, ensuring all application data access occurs exclusively through definer-rights PL/SQL packages and secured views. - Create and configure Oracle Label Security (OLS) policies, including hierarchical security levels, data compartments, and organizational groups to enforce row-level data access. - Establish and manage Database Vault (DV) realms and command rules to protect base tables and critical packages from unauthorized access, including privileged database administrator accounts. - Implement Virtual Private Database (VPD/FGAC) policies as an additional layer of defense for filtering data based on session context. - Collaborate closely with Java application developers to define the PL/SQL API contract for data access and to ensure the correct and secure propagation of end-user session context. - Implement and configure data-at-rest encryption using Transparent Data Encryption (TDE) and column-level masking for PII using Oracle Data Redaction. - Ensure the database design supports comprehensive and immutable auditing by integrating session context (CLIENT_IDENTIFIER, MODULE, ACTION) into all relevant policies and triggers. - Uphold and contribute to the evolution of database security standards, ensuring ongoing compliance with Zero Trust and IL5 architectural principles. - Perform other related duties as assigned. Qualifications - Must be a US citizen with the ability to obtain Public Trust clearance. - Working experience as an Oracle Database Modeler, Database Architect, or a similar role in a security-focused environment. - Deep, hands-on expertise with implementing and managing advanced Oracle security features, specifically: - Oracle Label Security (OLS) - Oracle Database Vault (DV) - Proven track record of designing and building secure data access APIs using PL/SQL packages, stored procedures, and views. - Strong proficiency in PL/SQL and a deep understanding of how to build a secure, definer-rights-based API layer. - Expert knowledge of Oracle's session context mechanisms (SYS_CONTEXT, DBMS_SESSION) and their use in enforcing security policies. - Solid understanding of relational database design principles and performance tuning. - Familiarity with secure network connectivity concepts for databases (e.g., TCPS/TLS). Requirements - Experience designing database solutions for compliance with government or military security standards (e.g., DoD IL5, DISA STIGs). - Practical experience applying Zero Trust security principles to a database environment. - Hands-on experience with Oracle Transparent Data Encryption (TDE) and Oracle Data Redaction. - Familiarity with high-availability Oracle solutions such as Real Application Clusters (RAC) or Data Guard. - Understanding of application-level concerns, including JDBC connection pooling and the challenges of context management. - Knowledge of enterprise identity management (e.g., Microsoft Entra ID) and secrets management solutions (e.g., HashiCorp Vault, CyberArk). Benefits - Eligible full-time employees receive a comprehensive benefits package, including: - Medical, dental, vision, life and disability coverage - Retirement savings with company match - Paid time off - Voluntary supplemental benefits - Access to an employee assistance program - Educational assistance, with tuition reimbursement

• Design, configure, maintain, and troubleshoot SQL Server Always On Availability Groups for mission-critical environments. • Manage Failover Clustering (WSFC), quorum configuration, and multi-subnet deployments. • Monitor and optimize replication lag, failover readiness, and AG health states. • Develop, maintain, and test DR strategies, including geo-replication and failover runbooks. • Implement backup/restore strategies using Full, Differential, Log backups, copy-only backups, and automated validation. • Develop and optimize T-SQL code, stored procedures, functions, views, triggers, and scripts. • Review SQL code for performance, security, and standards compliance. • Tune workloads using execution plan analysis, indexing strategies, statistics maintenance, and parameter sniffing mitigation. • Collaborate with development teams to design efficient schema, indexing, and query strategies. • Design and implement database archiving frameworks for large and older datasets. • Build automated archiving and purge jobs—while ensuring referential integrity and application continuity. • Define data retention policies aligned with compliance and business requirements. • Migrate historical data to secondary storage systems. • Implement and manage table partitioning for large-scale transactional data. • Create and maintain partition functions, schemes, sliding windows, and partition switch strategies. • Optimize data loading, maintenance jobs (index rebuilds, compression), and storage utilization. • Monitor and troubleshoot CPU, memory, IO, tempdb, locking/blocking, and wait statistics. • Optimize high-volume transaction environments and resolve performance bottlenecks. • Configure and maintain SQL Server monitoring solutions (DMVs, Extended Events, PerfMon, third-party tools). • Perform routine maintenance—indexing, statistics updates, integrity checks, growth management, and filegroup management. • Administer SQL Server instances across DEV, QA, UAT, and PROD environments. • Ensure security best practices—roles, permissions, encryption, auditing, and compliance. • Support release deployments and schema changes using version control pipelines.

Title: Data Engineer (PostgreSQL DBA) Location: United States Requisition number: 2367525 Job category: Technology Overtime status: Exempt Travel: No Job Description: Optum is a global organization that delivers care, aided by technology to help millions of people live healthier lives. The work you do with our team will directly improve health outcomes by connecting people with the care, pharmacy benefits, data and resources they need to feel their best. Here, you will find a culture guided by diversity and inclusion, talented peers, comprehensive benefits and career development opportunities. Come make an impact on the communities we serve as you help us advance health equity on a global scale. Join us to start Caring. Connecting. Growing together. Schedule: Monday to Friday, 9AM- 5 PM CST Location: Remote - Nationwide You will enjoy the flexibility to telecommute* from anywhere within the U.S. as you take on some tough challenges. Primary Responsibilities: - Install, configure,upgrade and maintain PostgreSQL databases in production and non‑production environments - Manage database availability, high availability configurations, and failover processes - Leverage enterprise-approved AI tools to enhance productivity and innovation by streamlining workflows and automating repetitive tasks. Evaluate emerging trends to drive continuous improvement and strategic innovation - Monitor database health and performance; proactively identify and resolve performance bottlenecks - Perform query and system-level performance tuning - Perform regular recovery testing and execute disaster recovery procedures as required - Ensure data integrity and recoverability at all times - Monitor database security and prevent unauthorized access - Manage user access, roles, and permissions in alignment with security standards and compliance requirements - Schedule and execute routine database maintenance activities - Troubleshoot and resolve production database issues, including data-related incidents - Provide best-practice guidance to development and application teams on database usage - Develop and enhance automation to streamline database operations and data loading processes - Utilize PostgreSQL utilities and tools and monitoring/management solutions to maintain the environment - Manage user access and permissions by adding and removing users as required - Maintain the database using different utilities. This includes using pg_ctl and psql You'll be rewarded and recognized for your performance in an environment that will challenge you and give you clear directions on what it takes to succeed in your role as well as provide development for other roles you may be interested in. Required Qualifications: - High School Diploma/GED - 3+ years of experience as a PostgreSQL Infrastructure DBA supporting Postgres in a large‑scale enterprise environment, including managing databases of 10+ TB - 2+ years of experience working with public cloud environment Preferred Qualifications: - Healthcare experience - Experience with MySQL or additional relational database platforms - Working knowledge of implementing AI-driven tools used in database operations, monitoring, and support environments - All Telecommuters will be required to adhere to UnitedHealth Group's Telecommuter Policy. Pay is based on several factors including but not limited to local labor markets, education, work experience, certifications, etc. In addition to your salary, we offer benefits such as, a comprehensive benefits package, incentive and recognition programs, equity stock purchase and 401k contribution (all benefits are subject to eligibility requirements). No matter where or when you begin a career with us, you'll find a far-reaching choice of benefits and incentives. The salary for this role will range from $72,800 to $130,000 annually based on full-time employment. We comply with all minimum wage laws as applicable. Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records. At UnitedHealth Group, our mission is to help people live healthier lives and make the health system work better for everyone. We believe everyone-of every race, gender, sexuality, age, location, and income-deserves the opportunity to live their healthiest life. Today, however, there are still far too many barriers to good health which are disproportionately experienced by people of color, historically marginalized groups, and those with lower incomes. We are committed to mitigating our impact on the environment and enabling and delivering equitable care that addresses health disparities and improves health outcomes - an enterprise priority reflected in our mission. UnitedHealth Group is an Equal Employment Opportunity employer under applicable law and qualified applicants will receive consideration for employment without regard to race, national origin, religion, age, color, sex, sexual orientation, gender identity, disability, or protected veteran status, or any other characteristic protected by local, state, or federal laws, rules, or regulations.

• Manage and administer the IBMi-AS400 Database Administrator team • Configure, install and maintain database management systems • Ensure database systems are running at peak performance • Manage user access and implement security protocols • Develop backup and recovery plans • Support end users and application developers • Conduct capacity planning and growth projections • Propose and implement enhancements for system performance