QUALIFICATIONS PROFILE

• 25 years total I.T. experience in the areas of database architecture, software and systems engineering
• 5 years of experience in Hadoop/Linux cluster administration including Cloudera and Hortonworks.
• 18 years of experience in data modeling, data warehouse design, development and administration.
• Operating Systems experience in CentOS/Red Hat Enterprise and Sun Solaris.
• Software experience in Apache Hadoop (Cloudera), Accumulo, Oracle, SQL Server, Postgres and MySQL.
• Familiarity and knowledge of “R”/Statistical Computing, Python and MongoDB.
• Fluency with configuration management and orchestration systems such as Puppet and Chef.
• Certified Cloudera Administrator for Apache Hadoop (CCAH)
• Certified PMI Project Management Professional (PMP).

PROFESSIONAL EXPERIENCE:

Confidential, Hanover, MD

Hadoop/Linux/Big Data Administrator

Responsibilities:

• Provided administration, monitoring and troubleshooting of development, testing and production servers.
• Architected and installed the production Cloudera/Hadoop clusters from scratch (20 nodes Confidential ).
• Hadoop security, HDFS data encryption and authorization using Kerberos, TLS/SSL and Apache Sentry.
• Responsible for implementation and ongoing administration of Hadoop infrastructure.
• Performed daily cluster health checks, log analysis and disc maintenance.
• Implemented HDFS and Resource Manager High Availability.

Confidential, Rockville, MD

Big Data Infrastructure Engineer/Administrator

Responsibilities:

• Monitor Hadoop cluster connectivity, Hadoop security, Hadoop MapReduce routines and cluster performance tuning.
• Cluster maintenance as well as creation and removal of nodes using tools like Nagios, Ambari and other tools.
• Diligently teaming with the infrastructure, network, database, application and business intelligence teams to guarantee high data quality and availability.
• Provisioned cluster servers to handle both Hortonworks installation and server patch updates.
• Deployed new hardware and software environments required for Hadoop and to expand existing environments.
• Setup of new Hadoop users, Linux users, Kerberos principals and testing HDFS, Hive, Pig for the new users.
• Point of Contact for Hortonworks vendor escalation.

Confidential, College Park, MD & Rockville, MD

Lead Data Architect/SQL Server DBA

Responsibilities:

• Provided administration, monitoring and troubleshooting of development, testing and production servers.
• Responsible for refreshing schemas and scientific datasets for development and testing environments
• Conducted OLTP Design (conceptual/logical/physical), development, implementation, and maintenance phases.
• Physical implementation of databases, storage structures, high - availability solutions and disaster recovery.
• Generated code to extract, transform, and load data from/to production data sources from/to external sources (excel, text comma and tab delimited files, other Access, SQL databases, XML, etc.).
• Implemented data warehouse architecture practices including data strategy, data standardization and data governance.

Confidential, Fulton, MD

Senior Principal Engineer - Oracle DBA/Hadoop Administrator

Responsibilities:

• Performed database performance tuning and implementation of data security on Oracle database instances.
• Maintained the physical database design including schemas, indexes underlying data files.
• Created and managed RMAN backup scripts to support weekly and daily incremental backups.
• Handled extracting/importing of data from various data sources into Hive/HDFS using Sqoop.
• Created reports for the data warehousing team using Sqoop to export data into HDFS and Hive.
• Performed configuration, administration and monitoring of Hadoop clusters. Used Ganglia and Nagios.

Confidential, Annapolis Junction, MD

Hadoop Administrator

Responsibilities:

• Responsible for implementation and ongoing administration of Hadoop infrastructure.
• Proposed new hardware/software environments required for Hadoop and expand existing environments.
• Performed setup of Linux users, Kerberos principals and access of HDFS/Hive/MapReduce for the new users.
• Performance tuning of Hadoop clusters and Hadoop MapReduce routines.
• Management of Hadoop log files, system management and monitoring with Nagios and Ganglia.
• Conducted monitoring and troubleshooting of NiagaraFiles data flows into Hadoop/HDFS.

Confidential, Annapolis Junction, MD

Senior Principal Database Engineer

Responsibilities:

• Established data architecture practices including data strategy, data standardization and data governance.
• Performed database administration, maintenance, troubleshooting and performance tuning activities.
• Created physical/logical database models solutions based on technical documents and business requirements.
• Developed database functions, scripts, stored procedures and triggers to support application development.
• Ensured data integrity, data quality and data security policies in database systems.
• Prepared documentations regarding database design, configuration and change management tasks.
• Performed data backup/restore, user and system testing and implementation of bug fixes on regular basis.

Confidential, Annapolis Junction, MD

Senior Systems Database Engineer/DBA

Responsibilities:

• Performed data requirements analysis, data modeling and established data architecture standards.
• Maintained the physical database design including schemas, indexes underlying data files.
• Developed plans for data strategy, data migration, data quality and database backup/recovery.
• Performed database performance tuning and implementation of data security on Oracle databases.
• Performed dimensional data modeling to support data warehouse design and ETL development activities.
• Development tools included Oracle, Informatica, Sun/Unix and Erwin.

Confidential, Columbia, MD

Principal Consultant/Data Architect/Database Administrator

Responsibilities:

• Served as the Technical Task Lead for a large data warehouse project to support a government agency.
• Analyzed task requirements for appropriateness, resource requirements, budgets, risk and scheduling.
• Performed data requirements analysis, data modeling and established data architecture standards.
• Developed plans for data strategy, data migration, data quality and database backup/recovery.
• Performed database performance tuning and implementation of data security on Oracle databases.
• Development tools included Oracle 9i, Oracle 10g, Informatica, Sun/Unix and Erwin.

Confidential, Hanover, MD

Engineering Senior Scientist/Database Engineer/ Database Administrator

Responsibilities:

• Served as Database Engineer for a radar signals database to support a government agency.
• Performed data requirements analysis, data modeling (using Erwin) and established data architecture standards.
• Developed plans for data strategy, data migration, data quality and database backup/recovery.
• Performed database performance tuning and implementation of data security on Oracle databases on Linux.
• Maintained the physical database design including schemas, indexes underlying data files.

Confidential, Columbia, MD

Lead Data Architect/Database Administrator

Responsibilities:

• Led technical team of data modelers in the design of a multi-terabyte healthcare data warehouse.
• Established data architecture standards, requirements and procedures for the data warehouse and ODS.
• Performed dimensional data modeling using Erwin to support data warehouse design and ETL development.
• Conducted data extraction for the data mining problem definition, data acquisition and model building.
• DBA tasks included Oracle and Linux performance tuning, indexing/partitioning strategies and data security.

Confidential, Pennsylvania

Lead Technical Consultant

Responsibilities:

• Led data warehousing efforts for clients in pharmaceutical, insurance and healthcare corporations.
• Designed and developed a series of data marts to support reporting needs of healthcare firm.
• Served as SQL Server DBA on various projects providing database backups, recovery and schema management.
• Served as Oracle developer on various projects providing user interface development.
• Served as project team leader and later as project manager on various projects.