Accumulo Database Engineer SME

P3S Corporation is seeking a highly skilled Senior Accumulo Database Engineer / Subject Matter Expert (SME) to support mission-critical Department of Defense and Intelligence Community systems within a TS/SCI environment. This position serves as the technical authority for Apache Accumulo architecture, administration, optimization, security, and integration across large-scale enterprise data platforms.

The ideal candidate possesses deep expertise in Apache Accumulo, Hadoop ecosystems, HDFS, distributed computing architectures, data governance, and secure data management. Candidates may come from a Database Administration, Software Engineering, Data Engineering, or Big Data Engineering background but must demonstrate expert-level Accumulo knowledge and hands-on operational experience.

This role supports high-volume ingest, secure data storage, advanced analytics, and mission systems requiring high availability, performance optimization, and compliance with Intelligence Community and Department of Defense security requirements., Apache Accumulo Administration & Engineering

• Serve as the primary technical expert for Apache Accumulo architecture and operations.
• Design, deploy, configure, maintain, and optimize enterprise Accumulo clusters.
• Administer and troubleshoot:

• Tablet Servers
• Master Services
• ZooKeeper
• HDFS
• Write-Ahead Logs (WAL)
• Metadata Tables

• Manage tablet assignment, balancing, compactions, and recovery operations.
• Develop operational procedures supporting cluster health and resiliency.

Data Architecture & Modeling

• Design scalable Accumulo schemas and row-key strategies.
• Optimize:

• Scan performance
• Load distribution
• Hotspot avoidance
• Data locality

• Implement:

• Locality Groups
• Bloom Filters
• Time-series partitioning strategies
• High-ingest architectures

Security & Data Governance

• Implement and manage Accumulo Cell-Level Security.
• Design and administer:

• Visibility Labels
• Authorizations
• Classification schemas
• Access control policies

• Support compliance with:

• RMF
• NIST 800-53
• DoD Cybersecurity Policies
• Intelligence Community security requirements

• Maintain auditability, lineage tracking, and data retention controls.

Performance Optimization & Troubleshooting

• Monitor and tune Accumulo cluster performance.
• Analyze:

• Tablet distribution
• Cache utilization
• Garbage Collection activity
• Compaction queues
• WAL performance
• HDFS health

• Resolve performance bottlenecks impacting ingestion, querying, and storage.
• Develop monitoring dashboards and performance baselines.

Bulk Ingest & Data Pipelines

• Design and support high-volume data ingestion architectures.
• Implement:

• Bulk Imports
• RFiles
• MapReduce Jobs
• Hadoop Workflows
• Spark Pipelines

• Develop validation strategies ensuring data integrity and consistency.
• Optimize ingest throughput while minimizing impact to query performance.

Iterator Development

• Design, implement, and maintain custom Accumulo iterators.
• Develop:

• Aggregation Iterators
• Filtering Iterators
• Age-Off Iterators
• Combiners

• Evaluate server-side versus client-side processing approaches.
• Optimize iterator stack performance.

Database Administration

• Manage enterprise databases including:

• Apache Accumulo
• PostgreSQL
• MongoDB

• Implement backup and recovery strategies.
• Support disaster recovery planning and execution.
• Maintain high availability and system reliability.

System Integration

• Collaborate with software development teams utilizing:

• Java
• Spring Framework
• REST APIs
• Big Data Platforms

• Support enterprise application integration and data services.

Operations & Lifecycle Management

• Perform upgrades and migrations for:

• Accumulo
• Hadoop
• ZooKeeper
• HDFS

• Develop rolling upgrade strategies minimizing operational downtime.
• Create technical documentation, SOPs, architecture diagrams, and operational runbooks.

Do you have experience in ZooKeeper?, Do you have a Bachelor's degree?, Bachelor's Degree in one of the following:

• Computer Science
• Information Systems
• Software Engineering
• Data Engineering
• Computer Engineering
• Related Technical Discipline

(Additional experience may be substituted for education where permitted.)

Experience

• 8+ years of enterprise database administration or engineering experience.
• 5+ years supporting Hadoop ecosystem technologies.
• 5+ years supporting distributed data platforms.
• 3+ years of hands-on Apache Accumulo administration and engineering experience.
• Experience supporting classified DoD or Intelligence Community environments.

Required Technical Skills

Expert knowledge of:

• Apache Accumulo
• Hadoop Ecosystem
• HDFS
• ZooKeeper
• RFiles
• Tablet Architecture
• Major and Minor Compactions
• Write Ahead Logs (WAL)
• Data Modeling
• Java
• Linux Administration
• PostgreSQL
• MongoDB
• Security Hardening
• Backup & Recovery
• Performance Tuning

Desired Qualifications

Preferred certifications include:

• CISSP
• CISM
• CASP+
• Certified Hadoop Administrator
• Cloudera Certification
• MongoDB DBA Certification
• PostgreSQL Certification
• AWS Data Analytics Specialty
• Certified Data Management Professional (CDMP)

Preferred experience:

• Intelligence Community data platforms
• GEOINT, SIGINT, or Cyber Operations environments
• Spark
• NiFi
• Elasticsearch
• Kubernetes
• Cloud-hosted Big Data architectures