8 employees have rated Marchex Chief Executive Officer Russell Horowitz, Michael Arends, and Ethan Caldwell. on Glassdoor.com. Russell Horowitz, Michael Arends, and Ethan Caldwell. has an approval rating of 58% among the company's employees. This puts Russell Horowitz, Michael Arends, and Ethan Caldwell. in the bottom 25% of approval ratings compared to other CEOs of publicly-traded companies.