Sullivan and Cogliano a CorTech Company | 1,246 followers on LinkedIn. Our People Make the Difference | Sullivan and Cogliano has a distinguished operating history of over 50 years and serves North America with Technology Staffing and Workforce Solutions. The vast majority of our current clients first started using us primarily because they realized they were settling for less than “world class” service from their current suppliers. They also didn't want to deal with firms that waste their time with low quality resumes, misrepresent contract professional qualifications, constantly harass you with sales calls and don't understand your business or project needs.