R. Lahav-Rigg expanded at the beginning of 2010 when architect Prof. Dan Eytan joined the firm as a senior partner. The partnership between Dan Eytan and Ruth Lahav has been practicing on an ad-hoc basis for some years, designing several public buildings in competitions throughout the country.

Ruth Lahav and Dan Eytan have together many years of experience in a varied, wide spectrum of architectural design: Public buildings (such as museums, public halls, universities, schools and kindergartens), Office buildings (office towers, government offices and commercial offices), Residential design (high density dwellings, residential towers, sheltered housing, stepped housing and private homes), Commercial buildings (shopping centers, commercial shopping streets, mixed use office & commercial buildings), Hotels (hotel towers, boutique hotels), Interior design (offices, sheltered housing, commercial and shopping malls), Landscape design (roads, public parks & gardens), Bridge design (cars and pedestrain bridges), and Town Planning (small scale plans, detailed masterplans & town planning).