Who Are We?

Passion for results

Ellzey Zissos and Associates was formed by sulphur industry executives Peter Zissos and Ken Ellzey to solve problems. We have a passion for sulphur and have tackled major challenges while managing the day-to-day complexities of sulphur throughout our careers.

We see near-term challenges faced by the sulphur industry as opportunities to tailor new, unique, innovate solutions that deliver lasting positive impacts for our clients.

Our Team

Throughout his career, Ken held key leadership positions at Freeport-McMoRan and Savage Services, developing and leading sustainable sulphur business strategy to balance serving client’s needs, engaging employees, and delivering economic improvements. He is highly qualified and tested with a leadership style that focuses on understanding client challenges first and working collaboratively to offer transparent solutions. He succeeded in tackling complex challenges in ways that offered new strategic options to access global markets. Integrity is a cornerstone in the way he consults for and advises clients.

Ken had the honour of being selected by industry to serve as 2007/2008 chairperson of The Sulphur Institute.

Peter Zissos is a seasoned executive with over 20 years of experience in the sulphur industry. He began his career working in various global roles within sales, procurement, logistics, operations, and strategy for Shell, where he developed a deep understanding of the intricacies of sulphur production, logistics, and market dynamics. Peter retired from Shell in 2024 leading Shell’s global sulphur business as the general manager of the Sulphur and Thiogro businesses, and as vice president of Shell’s Agriculture and Forestry division. Through his hands-on experience and relentless dedication, Peter is recognized as a trusted expert in the field, known for his strategic insights and innovative approaches to sulphur management.

Peter has served on the boards of Sultran, Pacific Coast Terminals, Alberta Sulphur Research and as board member and two-time chairperson of The Sulphur Institute.

Charles Ingoldsby (P.Eng) has over 20 years of experience in the sulphur and fertilizer industries. He began his career at Agrium (now Nutrien), working across their Western Canadian Operations. Charles spent 16 years at Shell, where he was recognized as a subject matter expert in sulphur handling. During this time he held progressively senior roles in engineering, sales, procurement, logistics, and innovation. He was instrumental in the development and commercialization of the Shell Thiogro product line and contributed to many industry innovations.

Charles has a Bachelor of Science in Mechanical Engineering from the University of Alberta. He has also served on the Technical Advisory Committee for Alberta Sulphur Research, contributing to advancements in sulphur processing and related technologies.