Digital marketing firm Elasticity, based in St. Louis, Missouri, promoted Collin Schuck to director of social media and public relations. He will oversee the agency's social media and influencer marketing department. William B. Jones joined St. Louis, Missouri, based labor and employment firm McMahon Berger, after nearly 18 years leading the global HR legal initiatives at Enterprise Mobility. Lawrence Group hired Nick Naeger as associate principal/senior project manager, and Colleen O'Brien as senior project accountant.