Wolverine Worldwide has announced several organizational changes in an effort to strengthen its senior leadership team and accelerate global growth. James D. Zwiers, who has held significant roles during his 16 years with the company, has been appointed president of the international group. James A. Gabel, most recently president of Adidas Group Canada, will succeed Zwiers as president of the performance group, which is comprised of the Merrell, Saucony, Chaco, Cushe and Patagonia brands. Andrew Simister will take over as president of the company’s lifestyle group, comprising Sperry Top-Sider, Hush Puppies, Keds and the Stride Rite Children’s Group. Meanwhile, William J.B. Brown, a 27-year veteran of Wolverine who has been instrumental in the global expansion of the company’s portfolio of brands, has announced his retirement.