Crawford & O'Brien | 109 followers on LinkedIn. Crawford & O'Brien is a full service digital marketing agency based in Denver, CO - we are the epitome of a fusion agency that views the world with a creative eye and a marketer's mind. We help established businesses take their company to the next level by implementing a holistic digital marketing approach that not only produces a massive loyal following, but high-quality leads that convert to sales. We utilize high-level tactics within our SEO, PPC, Social Media, Content and Email Marketing in combination with Review and Reputation Management that provide our clients with consistent, measurable results.