Association of Executive Search and Leadership Consultants (AESC) | 28,242 followers on LinkedIn. Dedicated to Strengthening Leadership Together | Since 1959, the Association of Executive Search and Leadership Consultants (AESC) has set the quality standard for the executive search and leadership consulting profession. Its members are the leaders in executive talent and leadership advisory solutions. AESC Members, ranging in size from large global executive search and leadership consulting firms and networks to regional and boutique firms, represent 16,000+ trusted professionals spanning 1,200+ offices in 70+ countries.