Recently came back home to WalmartLabs after a fabulous journey with Silicon Valley Data Science where I continued my journey with enabling business transformation to several large clients across the globe.Led development of multi-petabyte hadoop platform at WalmartLabs including deployment of two separate Impala data warehouses hosting production and adhoc workloads serving hundreds of billions of rows of log and transactional data. Each of these warehouses also included hbase instances setup with active-active replication in two separate data centers serving millions of reads per second on near real-time data feeds from flume.Took first hadoop system at Walmart Stores from idea to multi-petabyte production system starting in 2009. Proposed building hadoop as compliment to data warehouse and data mining platform. Rapidly went from proof of concept to full production deployment enabling customers to perform analysis that could not be done in existing systems.Life before Hadoop consisted of building several advanced analytics applications including: distributed optimization engine for workforce scheduling, forecasting systems using over ten years of history to predict daily, weekly and monthly sales, transportation route scheduling systems, supply chain optimization systems and various data mining efforts.Specialties: Big Data. Optimization modeling including linear and integer programming as well as custom algorithms. Statistical systems development including forecasting and data mining. Applications development in multiple languages.Technical Skills/Software: Analytics platform mastery including SAS,OPL/CPLEX,SPSS,Clementine and KXEN. Data platform skills in Hadoop, Hive, Impala, Hbase, Cassandra, Oozie, Sqoop, Flume, Teradata, Mysql, Postgres, Oracle, SQLServer, Informix and DB2. Programmed in C, C++, Java, SAS, Complex SQL, Perl and Python.