Columbus, Ohio-based Big Red Rooster has added four new staff members to its Atlanta and Phoenix offices. Nicholas L. Atherton joined the Phoenix office as an auto CAD technician. In his role, Atherton prepares construction and design documents for various clients. The company also hired Robert Chapman as project manager for the Phoenix office. He oversees architecture construction documentation and serves as a primary client contact. Additionally, Alexander Triplet joined the Phoenix team as an architecture CAD technician. In his role, Triplet prepares 3-D models, renderings and graphics, while also supporting construction document production. The Atlanta team welcomed Derek B. Seiling as a project manager. He manages projects for a leading QSR client.