Sanjiva Weerawarana

A software developer and open source evangelist. He is known for:

His work on the Web Services standards including WSDL, BPEL, and WS-Addressing.
Founding WSO2, an Open Source middleware company.
His involvement with the Apache Software Foundation, including work on Apache SOAP, Apache Axis and Apache Axis2.
Setting up the Lanka Software Foundation.
Involvement with the Sahana FOSS Disaster Management System.
Advisory Board Member 24/7 Techies[1]

He is currently Chairman and CEO of WSO2 Inc. He lives in Colombo, Sri Lanka. He is a visiting professor and lecturer at the University of Moratuwa and a board alumnus of the Open Source Initiative.