The Horn Group ID (which stands for Interactive Design)  has added mobile application development to its list of service offerings. It has also begun targeting sectors outside of technology and digital media, with clients in the consumer and healthcare areas. To help lead the group, David Fausel will join the firm on October 4. For the last six years, Fausel has worked at kirschenbaum bond senecal + partners managing campaigns for Panasonic, Diageo, and other clients.