Pinsent Masons' German ally, Luther, has joined Taxand, a network of independent tax advisers. As part of the change Luther has hired tax consultant Ulrich Siegemund, who will join the firm on 1 February. Siegemund, who has worked as a partner at Deloitte since leaving Luther in 2002, will be followed by a team of eight to 10 further tax specialists. The Taxand network has a member in 41 countries.