sadhachen is an international interior design practice dedicated to bringing new and sophisticated creative ideas to the hospitality world. Formerly known Tonny Sadha Interior Design, Inc. (TSID), the company was founded in 2005 in New York City by Tonny Sadha. In 2007 Jenny Chen joined TSID, bringing 15 years of experience, with a particular focus on restaurant design. With a newly opened Shanghai office in 2012, the two partnered up, with the name of the firm changed to sadhachen.