Meet our leadership team. DTE Energy Services executives and their biographies, appear below.
Dave Ruud manages the company’s day-to-day activities and its strategic planning, business development, financial management and general administration.
Before joining DTE Energy, he was vice-president and partner at L.E.K. Consulting, an international consulting firm focused on delivering results for clients in the areas of strategy, mergers & acquisition, and value management. Prior to joining L.E.K., he was a program manager for Honeywell International and in business development leadership positions at a southwestern energy company.
Ruud earned an MBA with distinction from Northwestern University and a BA in Aerospace Engineering from Penn State University.
Vice President, Business Development
Karl Wittbold directs all aspects of industrial project development including implementation of new industrial development strategy, project identification, and execution and coordination of related activities.
Prior to joining DTE Energy, he served as vice-president of CMS Enterprises with responsibility for North American project development. He also served as vice-president of CMS Gas Transmission, where he developed natural gas pipeline projects in North and South America. Prior to joining CMS, Wittbold was with Coastal Corporation’s ANR Pipeline and Colorado Interstate Gas Company units in various market development and finance related positions.
Wittbold earned a BA in Finance from Central Michigan University.
Steve Earhart leads On-site Energy projects through the complete development process including identifying prospects, evaluating technical and economic feasibility, proposal development, negotiating contracts and initial scheduling and implementation activities.
Prior to joining DTE Energy Services, Earhart was vice president at Foram Group, responsible for operations, capital projects and contract negotiation for a Florida commercial property portfolio. Before that, Earhart worked at Florida Power & Light on the development, engineering and planning of large commercial and government electrical projects.
Earhart earned an MBA from Nova University and a BS in Electrical Engineering from the University of Central Florida.
Gary Gross leads and manages all aspects of DTE Energy Services Coke Plants and Pulverized Coal Injection facilities. He also leads new business development activities within the steel industry.
Before joining DTE Energy Services, he was the vice president of National Industrial Maintenance, a Carylon Corporation company located in Dearborn, MI. He managed the day-to-day activities of the company, business development, general administration as well as labor negotiations.
Prior to joining National Industrial Maintenance, he retired from National Steel where he held various positions at the Coke Plant and Blast Furnaces.
Power & Renewables
Steve Sorrentino is responsible for developing and managing the company’s wholesale power and renewables portfolio. He leads the project development process including identifying prospects, evaluating technical and economic feasibility, proposal development, negotiating contracts and scheduling and implementation activities.
Prior to joining DTE Energy Services, Sorrentino worked at PG&E National Energy Group in a variety of roles including Regional Director of Assets, General Manager, Project Manager and Business Development Manager for the NEG portfolio. Before that, he was with Bechtel Power Corporation, involved in the development and management of large-scale power generating facilities.
Sorrentino earned a BS in Civil Engineering from Northeastern University.
Pulp & Paper Holdings
Chuck Holt originates and leads the development activities for major Pulp and Paper energy projects.
Prior to joining DTE Energy Services, Holt directed business development activities at a unit of Trigen Energy Corporation, a developer and operator of electric and thermal energy systems. Before that, he was Division Marketing Manager at Westinghouse Electric Corporation. Holt began his career working in engineering and financial management capacities for Exxon Corporation.
Holt earned an MBA with honors from the University of Michigan and a BS in Chemical Engineering at Cornell University.
Steve Hudolin manages PetCoke’s day-to-day activities and its strategic planning, business development, financial management and general administration.
Before joining DTE Energy Services, he was Development Director at CMS Energy, where he led acquisition, cogeneration development, foreign privatization and financial restructuring projects. Prior to that, he was Senior Planning Analyst at Great Lakes Gas Transmission Company, where he developed financial models to evaluate the economic viability of safe harbor leases, energy-related investments and other special projects.
Hudolin earned an MBA in Finance from the University of Detroit and an AB in Economics from the University of Michigan.
Dave Smith is responsible for developing the company's steel portfolio. He leads the project development process, including identifying prospects, evaluating technical and economic feasibility, proposal development, negotiating contracts and scheduling and implementation activities.
Smith has also served as Asset Manager and Project Controller for the Business Development group. He held responsibility for the financial performance of various commercial and steel-related projects including our three coke batteries and three PCI facilities. Prior to joining DTE Energy Services, Smith worked at Mallinckrodt Medical Co., Inc., in various financial and accounting positions.
Smith earned a MS in Finance from Walsh College and a BS in Business Management from Cleary University.
Mark H. Rigby
Mark Rigby is the Vice President, Finance for DTE Energy Services. He is responsible for leading the finance function including the identification, valuation and execution of business opportunities and arranging project debt and equity for the company.
Since joining the Company in 1997, Rigby has been instrumental in growing DTE Energy Services’ investments in its steel industry-related, on-site energy, power and tax advantaged projects.
Prior to joining DTE Energy Services, Rigby was with Air Products and Chemicals, Inc. where he held positions in international and project finance, business development, and financial analysis. While at Air Products, he arranged project finance facilities for domestic and international power and industrial gas projects. Earlier in his career, he was a certified public accountant with the Washington, D.C. office of KPMG.
Mark Rigby earned a BS in accounting from The Smeal College of Business Administration of The Pennsylvania State University and an MBA for The Colgate Darden Graduate School of Business Administration of The University of Virginia.