Executive Committee
Joi Harris
President & Chief Executive Officer
Joi Harris is president and chief executive officer of DTE Energy and a member of the company’s board of directors. Prior to being named CEO in 2025, Harris served as chief operating officer, responsible for leading both DTE Electric and DTE Gas utilities, as well as Customer Service, Information Technology, Corporate Services and the Environmental Management and Safety organizations.
Among many accomplishments, Harris served as the president and chief operating officer of DTE Gas and led the construction of renewable energy projects and the company’s Blue Water Energy Center, positioning the company for a future of clean and sustainable energy production.
Harris’ career with DTE spans more than 30 years. She joined DTE Gas (formerly Michigan Consolidated Gas Company) in 1991 and served in leadership positions in areas including distribution field operations, system control and transmission operations.
Harris earned a Bachelor of Science degree in industrial engineering and a Master of Business Administration degree from Wayne State University.
She holds a number of advisory roles in the industry, including serving on the board of directors for the Edison Electric Institute, the Nuclear Energy Institute and the Association of Edison Illuminating Companies. Harris is also a member of the board of trustees for the Skillman Foundation and the board of visitors for Wayne State University College of Engineering
Harris has been recognized by Crain’s Detroit Business as a 2025 Woman of Influence, the Michigan Chronicle’s Women of Excellence program as Woman of the Year and received Energetic Women’s Maverick Award – special recognition to leaders who have set the standard in promoting, connecting and strengthening female leaders in energy operations and engineering.
Diane Antishin
Senior Vice President, Human Resources and Chief Diversity, Equity & Inclusion Officer
Diane M. Antishin is senior vice president of Human Resources and chief diversity, equity & inclusion officer for DTE Energy. Antishin is responsible for the design, development, and execution of enterprise-wide strategy for workforce planning and development, talent acquisition, talent and succession planning, executive and employee compensation and benefits, payroll, health and wellness, and labor and employee relations. In addition, she oversees the company’s diversity, equity and inclusion strategy, cultivating a work and learning environment that encourages, supports, and values the multicultural mosaic of DTE’s team members, customers, business partners, suppliers and communities. Connected to her stewardship of DTE’s work environment, she leads the company’s efforts to equip and inspire team members to continuously improve their work processes to provide better service to customers and each other.
Antishin also leads the employment and education pillar of the company’s force for growth strategies, driving economic growth and prosperity in the communities it serves.
Prior to joining DTE Energy, Antishin held leadership roles in labor relations, operations and manufacturing at American Axle & Engineering. In all, her career as a human resources professional spans over 25 years in the utility and automotive industries.
Antishin earned a Bachelor of Science degree in business administration and a Master of Business degree in business administration with a concentration in human resources management from Wayne State University. She has also attended the Ross School of Business Executive Education program at the University of Michigan and is a graduate of Leadership Oakland.
Antishin is a member of the HR Policy Association, serving on the labor relations advisory and employment rights committees, and is a member of the board of governors for the American Health Policy Institute. She also serves on the Conference Board Council of U.S. D&I Executives and the board of directors for the American Society of Employers, the Haven-Oakland Foundation, and the board of visitors for the Wayne State University Mike Ilitch School of Business. She draws inspiration from her favorite quote: “We see the world not as it is, but as we are.”
Trevor F. Lauer
Vice Chairman & Group President
Trevor F. Lauer is vice chairman and group president for DTE Energy. In this role, he is responsible for leading DTE’s growth, business development, regulatory and corporate and government affairs organizations.
Lauer joined DTE Energy in 2005. Prior to his current position, he was president and chief operating officer of DTE Electric, the company’s electric utility serving 2.3 million customers in southeast Michigan. Lauer has also served as senior vice president of Distribution Operations.
Prior to joining DTE Energy, Lauer was executive vice president at Pittsburgh-based Strategic Energy LLC, a nationwide energy supplier. He also worked in a variety of leadership and general management positions at Honeywell, Inc. in the Washington, D.C. area.
Lauer earned a Bachelor of Science degree from Pennsylvania State University and a Master of Business Administration degree from the University of Maryland. He is a 2006 graduate of Leadership Michigan. Lauer also completed the Massachusetts Institute of Technology Nuclear Reactor Technology program in 2019.
He is active in the community and serves on several boards. He is a member of the Executive Committee for the Detroit Regional Chamber and a trustee for the Cranbrook Institute of Science. He is also a board member for Business Leaders of Michigan and the Michigan Economic Development Foundation.
Kathrine Lorenz
Senior Vice President & Chief Legal Officer - DTE Energy
Kathrine Lorenz is senior vice president and chief legal officer for DTE Energy. She manages and sets the strategic direction of DTE’s Office of the General Counsel and advises DTE’s board of directors and senior management on legal and related matters. Lorenz also leads Ethics and Compliance, Security and Emergency Management for the company.
Lorenz joined DTE in 2012 and has served in various leadership roles in the Office of the General Counsel. Prior to joining DTE, she served as in-house counsel for another Michigan utility.
Lorenz earned her undergraduate degree at Central Michigan University, where she subsequently established the Lorenz Family Inclusion Scholarship which is awarded annually to a student passionate about LGBT equality issues. She earned her law degree from Cooley Law School.
In addition to her work as a board member of the Ruth Ellis Center, Kathrine and her family enjoy spending time with their rescue/foster dogs and supporting animal adoption and rescue causes locally.
Lisa A. Muschong
Vice President, Corporate Secretary & Chief of Staff - DTE Energy
Lisa A. Muschong serves as vice president, corporate secretary and chief of staff for DTE Energy. In her role as corporate secretary, Muschong is responsible for designing and maintaining a sustainable governance framework. This includes ensuring that Board of Director matters such as refreshment, diversity, effectiveness and other governance policies and standards align with best practices. She provides guidance and resources for the Board to fulfill its fiduciary responsibilities to shareholders. Additionally, she executes shareholder engagement strategies to enhance external perceptions related to DTE’s environmental, social and governance matters.
As chief of staff, Muschong partners with the chief executive officer and chief operating officer to enable them to focus on DTE’s mission-critical priorities and responsibilities. Her duties involve identifying and escalating enterprise risk issues, motivating and leading others in change initiatives, preparing for critical meetings, and managing differing opinions to appropriately influence key stakeholders and effectively advance mission-critical initiatives. Additionally, Muschong co-chairs efforts to cultivate and sustain a thriving organizational culture, including a best-in-class culture of health and wellbeing at DTE. She also serves as the executive champion of Women of DTE, an employee resource group dedicated to fostering employee growth and development through networking, community service and informal support groups.
Muschong joined DTE Energy in 1991. Prior to her current position, Muschong was director of Investor Relations where she was responsible for communicating DTE Energy’s business, financial and operating strategies to industry analysts and investors.
Muschong earned a Bachelor of Arts degree in finance from Michigan State University and a Master of Business Administration from Walsh College.
Since 2010, Muschong has served on the Board of Directors for Goodwill Industries of Greater Detroit, a comprehensive social enterprise dedicated to building pathways to independence through personal development and the power of work. Earlier in her career, she also served on the Board of Directors for the Detroit Edison Credit Union for nine years.
Matthew Paul
President & Chief Operating Officer - DTE Electric
Matt Paul is president and chief operating officer of DTE Electric, DTE Energy’s electric utility serving 2.3 million customers in southeast Michigan.
Paul’s career with DTE Energy spans more than 20 years, in which he has served in a number of senior leader positions, including executive vice president of Distribution Operations for DTE Electric as well as president of DTE Gas. He has also held leadership positions in DTE’s electric generation and non-utility businesses.
He earned a Bachelor of Science degree in mechanical engineering from Michigan State University and a Master of Business Administration degree from the University of Chicago.
Paul is a board member of the Michigan Manufacturing Association and the Autism Alliance of Michigan. He and his wife have four sons and enjoy spending family time in northern Michigan.
Angie Pizzuti
Senior Vice President & Chief Administrative Officer
Angie M. Pizzuti is senior vice president and chief administrative officer for DTE Energy. Pizzuti is responsible for leading a customer service organization that includes the operations of the call center, credit and collections, billing, revenue management and theft, and digital and transformative customer experience strategies. She also oversees several key functions across DTE, including community engagement, corporate communications, corporate services – facilities, procurement and fleet – as well as information technology.
Pizzuti has held a variety of customer service leadership roles within DTE. Prior to her current position, she was the executive director of Customer Service. In this role, she was responsible for the overall strategy and management of customer service operations and served as the deployment lead for the company’s recent migration to can SAP customer platform.
Prior to joining DTE, Pizzuti spent 10 years at Union Gas, headquartered in Chatham, Ontario, Canada where she held management roles in marketing, communications and public relations. She earned an Honor of Business Administration and a Master of Business Administration from the University of Windsor.
David Ruud
Vice Chairman & Chief Financial Officer
David Ruud is vice chairman and CFO. Ruud is responsible for the company’s finances.
Ruud joined DTE in 2005 and has served in several senior leadership roles throughout the organization, accumulating deep experience across DTE’s various businesses. He brings a strong combination of financial, strategic, operational and engineering experience to the role of CFO.
Prior to his current position, David Ruud was senior Vice President of Corporate Development and Strategy. In this role, Ruud worked with DTE’s executive team to shape company strategy and drive key strategic initiatives. Focused on identifying trends and themes in the industry, Ruud was instrumental in evaluating and pursuing value-enhancing growth opportunities and overseeing the company’s long-term planning.
Upon joining the company, Ruud led what is now DTE Vantage, and he was also responsible for DTE’s operational efficiency initiative and continuous improvement program.
Prior to joining DTE Energy, Ruud 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. While at L.E.K., Ruud led the North American Energy practice where he directed consulting engagements involving corporate and financial strategy, growth options, and performance improvement opportunities for energy clients.
Ruud earned a Bachelor of Science degree in aerospace engineering from Penn State University and a Master of Business Administration with distinction from the Kellogg School of Management at Northwestern University. He is the chair of the board of directors for Ann Arbor SPARK and is on the boards of the Downtown Detroit Partnership and the National Association of Manufacturers.
Renee Tomina
President & Chief Operating Officer - DTE Gas
Renee Tomina serves as president and chief operating officer of DTE Gas where she is responsible for DTE Energy’s natural gas utility, which serves 1.4 million homes and businesses across Michigan. In this role, she leads the DTE Gas team as they continue to modernize the company’s natural gas infrastructure throughout the state, enabling the growth of the business and ensuring the continued reliability and safety of the system. Tomina also leads DTE’s Project Management Office (PMO) organization, which oversees DTE’s largest initiatives, including electric grid modernization, renewable energy development and technology investments that improve service and affordability.
Tomina joined DTE in 2010 and has held leadership roles of increasing responsibility across the company. Prior to her current role she was senior vice president of the Project Management Office. She has also served as vice president of DTE Gas, where she led Gas Operations, including construction, distribution and planning of DTE’s natural gas pipeline system. Previously, she held leadership roles in Customer Service, Electric Operations and Continuous Improvement. Before joining DTE, she was a manufacturing leader in the automotive industry.
She earned a Bachelor of Science degree in electrical engineering from Lawrence Technological University and a Master of Science degree in systems engineering from Oakland University.
Tomina serves on the Executive Committee of the Michigan Economic Development Corporation, the boards of the United Way for Southeast Michigan and the Chaldean American Chamber of Commerce, and the Board of Trustees for Lawrence Technological University. She is also active in efforts to improve the communities where she lives and serves.
She, her husband and their three children enjoy traveling and are members of the autism family.
DTE Energy (NYSE: DTE) is a Detroit-based diversified energy company involved in the development and management of energy-related businesses and services nationwide. Its operating units include an electric company serving 2.3 million customers in Southeast Michigan and a natural gas company serving 1.4 million customers across Michigan. The DTE portfolio also includes energy businesses focused on custom energy solutions, renewable energy generation, and energy marketing and trading. DTE has continued to accelerate its carbon reduction goals to meet aggressive targets and is committed to serving with its energy through volunteerism, education and employment initiatives, philanthropy, emission reductions and economic progress. Information about DTE is available at dteenergy.com, empoweringmichigan.com, x.com/DTE_Energy and facebook.com/dteenergy.