Dan Sack is a Entrepreneur | Advisor at Arctop. He possess expertise in mobile devices, mobile advertising, mobile marketing, online advertising, strategic partnerships and 17 more skills. Colleagues describe him as "Dan is one of the smartest guys I know, and it is an absolute pleasure working with him. He has an incredible wealth of knowledge about the mobile advertising / monetization space, and he is always happy to share it when asked. He is proactive, diligent, concise, and just gets it. He's the guy you turn to when you have questions, want feedback or advice, or just want to throw around an idea. I feel really lucky to work with him." and "Dan is extremely knowledgeable about the mobile ecosystem, articulate and personable. At the same time he has a deep understanding of the client's needs and delivers great results. A pleasure to work with he focuses on the client's vision and makes sound business recommendations."