Arist Mastorides is a trusted executive advisor and coach with more than 35 years of experience guiding senior leaders and leadership teams through complexity, scale, and sustained performance. As a Senior Consultant and Executive Coach with Highland Performance Solutions, Arist brings deep operating credibility, enterprise leadership experience, and a practical understanding of what it takes to lead at the highest levels of an organization.

Arist’s advisory and coaching approach is grounded in firsthand executive experience. He has served in senior leadership roles across general management, enterprise transformation, and go-to-market strategy, working closely with boards, investors, and executive teams in highly visible, performance-driven environments. Most recently, Arist was Executive Vice President and Chief Customer and Transformation Officer at Hostess Brands, where he led all selling activities and the enterprise Transformation Office and played a key leadership role in the company’s $5.6B sale to J.M. Smucker at a record multiple. Earlier, he spent 32 years at Kimberly-Clark, holding 17 leadership roles across sales, marketing, and general management, including President of North American Consumer Tissue with responsibility for a $3.5B P&L and 2,800 employees.

Arist partners with CEOs, C-suite executives, senior functional leaders, and high-potential executives navigating growth, transition, or increased complexity. He focuses on the highest-leverage drivers of leadership effectiveness and enterprise value, including self-mastery, decision quality, courageous behavior change, and team performance at the top of the organization. Arist is particularly effective in helping leaders sharpen judgment, manage tradeoffs, strengthen trust and accountability, and translate insight into visible leadership impact.

Clients value Arist’s direct, thoughtful, and deeply human style. He builds trusted, non-transactional relationships, challenges leaders with empathy and candor, and remains focused on outcomes that endure. His work consistently helps leaders perform at a high level over time while maintaining perspective, energy, and alignment with what matters most.
EDUCATION • Bachelor of Science in Finance from Miami University • Executive Certificate in Leadership Coaching from Georgetown University • Hogan Assessment Suite Certi