Formal education is not necessarily required for Administrative Assistant roles. But for employees to succeed and to further develop their career within the company, certification in Business Administration would really help. So you can look out for these requirements. Proven experience with Microsoft Office tools and project management tools such as Basecamp, Trello, and Smartsheet would also be something to look out for. Candidates with soft skills such as communication and people skills are important too, as they will be working within a team, or working with customers and clients.