1. Familiarity with Exhibitions, Sand design and construction: Telemarketers with a background in international exhibitions are likely familiar with the dynamics of event marketing and having enough knowledge of Sand design and construction. 
2. Excellent Communication Skills in English: Being able to possess strong verbal communication skills to effectively engage with prospects over the phone. 
3. Sales and Persuasion Skills: Being able to persuade potential customers, handle objections, and ultimately close sales.
4. Customer Focus: Being customer-centric, understanding the needs and concerns of potential clients. 
5. Resilience and Persistence: Resilience and persistence are crucial traits for cold calling as the candidate should handle rejections positively. 
6. Adaptability and Empathy: The ability to adapt to various scenarios, industries, and customer profiles is a valuable trait. And being empathetic is better at building rapport and trust.
7. Time Management: Telemarketers need to manage their time efficiently to reach a number of potential clients. Look for candidates who can prioritize tasks and handle multiple calls within a set timeframe/
8. Team Player: Being a team player, collaborating with colleagues, and sharing insights can contribute to overall team success.
9. Analyzing data and Regular Reporting: Establish a regular reporting schedule where telemarketers can update upper management on their activities. This could include weekly or monthly reports summarizing key metrics, achievements, and areas for improvement.
10. Problem-Solving: Telemarketers will encounter challenges and obstacles. It's important that they not only report problems but also offer potential solutions.