Mark MacMahon

Mark MacMahon is a Managing Director at Perrin & Co. and an experienced chief executive, operating leader, and corporate transaction advisor with more than 30 years of experience building, scaling, transforming, and selling businesses.

Throughout his career, Mark has founded and led companies across engineering, technology, manufacturing, software, and life sciences. His experience includes executive leadership, operational restructuring, corporate growth, international expansion, acquisitions, divestitures, and strategic transactions.

Mark has led three company sales totaling approximately $58.5 million, including KDG Energy Services ($25.9 million), Liquid Engineering ($18.2 million), and College CAD ($14.4 million).

He has served as a chief executive officer, chief operating officer, and interim executive, helping organizations navigate leadership transitions, operational challenges, and strategic change.

His experience includes stepping into companies during periods of uncertainty, stabilizing operations, aligning management teams, strengthening commercial performance, and preparing businesses for significant corporate transactions.

Mark has managed international operations and relationships spanning the United States, United Kingdom, Canada, India, and Europe.

At Perrin & Co., Mark is available to support companies seeking experienced fractional or interim CEO and COO leadership, corporate turnaround assistance, strategic growth advisory, operational transformation, and transaction-related executive guidance.

His approach combines practical operating experience with strategic judgment, helping owners, boards, investors, and management teams translate complex business challenges into executable plans.