Demo/Appointment scheduling - US/Canada market

We are looking for a part-time resource (20 work hours a week) who would be calling US/Canada customers (B2B) - typically CXOs and Directors in Sales/Marketing domain, and setting up appointments for our sales team. The person must be very proficient in spoken and written English and should have experience in doing this activity in US market in the past. You can make use of direct calling/email/LinkedIn or any other method to achieve this.