As senior partner, Victor Gruen is responsible for the concept development of major projects. R. L. Baumfeld heads the Los Angeles office and has been in charge of many large projects, among them the Sothdale Center. Edgardo Contini directs engineering for the firm and is in charge of coordinating engineering and architectural design. Karl Van Leuven,. Jr., head of he Detroit office, has been the partner in charge of such major projects as Northland Regional Shopping Center in Detroit. Ben S. Southland is chief designer and director of planning.