Management Team

Jeffrey L. Cummings, President

President and Owner of the Duffy Companies and Mountain States Industrial Contractors
The subsidiary, Duffy Crane and Hauling Inc, was originally founded in Denver, CO in 1886 and is one of the oldest companies in the State of Colorado. Duffy Crane and Hauling is an accomplished leader in Heavy-Haul Transportation, Oversized Transportation, Commercial and Industrial Custom Crane and Rigging services. Duffy specializes in the complex movement and installation of large oversized energy products and services in the Rocky Mountain West and Continental USA.

Jeffrey is an active business and community leader and is currently the President and a Board Member of the Rocky Mountain Crane Owners Association, an Executive Board Member and Chair of the Colorado Motor Carriers Associations, and a Member of the Board of Directors of Pinnacol Assurance and the Pinnacol Foundation. Jeffrey is engaged in other Nonprofit Board activities and is a past Trustee of the Western Region Ironworkers Trust Funds.

Jeffrey's background includes more than 30 years as a Business Executive, Industry Leader, and Certified Public Accountant. Jeffrey is graduate of Drury University in Springfield, Missouri, with BA in Business Administration and Economics, and a Minor in Accounting.

John Krane

V.P. of Sales and Marketing for all Duffy Companies
Mr. Krane has more than 20 years of experience in the crane industry. A native of the Kansas City area, he began his career in crane manufacturing with RO Corporation (now a division of Terex Cranes).

John’s broad base of experience includes both operations management and business development management at both local and national levels. He has provided cranes and project leadership on both coasts, including several projects in the Rocky Mountains, Intermountain Region, Gulf Coast, Midwest, west Texas, North Dakota and in the southeastern United States. In 2015 he became the first in the industry to lease the 716-ton Manitowoc MLC650 conventional crawler crane.

John earned his masters of business administration from Baker University. A certified crane inspector, he has earned additional certifications in a wide range of topics in crane operations, safety and business management.


Dennis Rooney

Millwright Division General Manager
Dennis has over 30 years’ experience in coordinating and managing construction projects in process and product manufacturing industries. He is licensed with a general building contractor’s license for the State of Utah and also his Construction “A” license/ certificate for the City and County of Denver, Fort Collins, Aurora and Adams County. He specializes in Millwright, Rigging, and Project Engineering. Dennis has a degree in Mechanical Engineering from Iowa State University.