ndy Knittle, the president of Nordica USA, is retiring after a 30-year career with the company, the last 10 years spent in executive management. Peter Weaver, the chief executive of Tecnica Group, will add the title and the responsibilities for Nordica, and Willy Booker will be general manager. Nordica is also moving all of its sales and marketing functions to its headquarters in New Hampshire. Kirk Langford, vice president for sales, has decided not to relocate and will leave the company effective June 1.