Most recently Jethwani held the position of client operations director where she managed an operations team responsible for a number of Lightspeed's clients.
Additionally, she has contributed to several of Lightspeed's strategic initiatives including online data quality and operational best practices.
Jethwani joined Lightspeed Research in 2004 as a senior project director. Prior to that she spent time at GfK, NOP as research director, and at Princeton Survey Research Associates as project director.
She will report directly to Christopher Urinyi, CEO, The Americas and will be based in Lightspeed Research's Basking Ridge office in New Jersey.
She has also been named to Lightspeed Research's leadership team in the Americas.
Urinyi said: "Tara's solid understanding of online market research and strong leadership will provide the high level of service expected by our clients.
"This appointment further highlights the strength and commitment of our company to being a leader in quality online market research solutions."