621 leverage a vast network of experienced talent to solve your company’s unique needs. They thoughtfully vet and select their team of individual contributors. They each bring expertise in their discipline and experience solving complex problems for top brands
Celtic Chicago, Inc., founded in 1992, is a full-service communications agency that launches products and brands with dynamic strategy and stellar creativity. Each of Celtic’s four distinct divisions, including Advertising, Digital, PR/Social and Association Management, is made up of experienced professionals with diverse talents.
Sims Creative is a Design Agency that helps all kinds of energy brands to grow via strategically informed design, highly considered marketing input and compelling creative work. They've helped small brands to develop from scratch, medium brands to increase their market share and big brands to increase sales while consistently maintaining their brand identities and seamlessly conveying their brand values. And they've done almost everything in between.