Mark Arensberg

Mark Arensberg is a veteran business transactional attorney with over four decades of experience advising companies, entrepreneurs, and professionals on business structures, contracts, and complex commercial matters. He has practiced law since September 1982 and will celebrate his 44th anniversary in the legal profession in 2026. Throughout his career, he has focused on providing practical legal guidance that supports businesses through growth, transitions, and changing economic conditions.

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Admitted to the United States Tax Court in December 1986, Mark has handled a wide range of legal and financial matters involving different industries. His work combines transactional knowledge, client-focused counsel, and long-term professional relationships. Alongside his legal practice, he has remained committed to literacy programs, community service, volunteer efforts, and family.

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Business Law and Transactional Experience

 

Mark has built his legal career around business law and transactional services. For more than 43 years, he has worked with companies and individuals throughout the United States, helping clients address legal matters connected to business operations, agreements, and strategic decisions. His early admission to the United States Tax Court strengthened his ability to manage legal issues involving financial and tax-related considerations.

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Long-standing client relationships have defined a significant part of Mark’s career. His representation of BoConcept of Denmark reached its 30-year milestone in September 2024. He has also provided legal services to All About Doors & Windows since 1985. These relationships demonstrate his focus on providing consistent legal support and maintaining trust with clients over many years.

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Arensberg Law Offices and Client Service

 

After serving as General Counsel to a group of public & private companies involved in investment advisory, asset management, and trust services, Mark established Arensberg Law Offices, P.A. in January 1990. The firm was created to provide businesses, professionals, and individuals with accessible legal services while avoiding the complexity often associated with larger firms.

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At Arensberg Law Offices, Mark focuses on direct client engagement and practical legal solutions. The firm provides ongoing counsel and works with a referral network that extends across the United States and internationally. This structure allows clients to receive specialized assistance while maintaining a central point of coordination for their legal needs.

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Legal Services and Business Advisory

 

Mark’s legal practice includes business structuring, contract development, contract negotiation, and agreement preparation. He works with clients to create legal frameworks that support business operations while protecting their interests.

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His experience also includes franchising matters, including franchise system development and preparation of required disclosure documents and registrations across jurisdictions. Mark provides guidance in commercial real estate matters involving development projects, acquisitions, property management, sales, and lease negotiations.

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Beyond traditional legal services, Mark provides business consulting related to strategic planning, financial restructuring, private placements, and mergers and acquisitions advisory services. His role often extends beyond preparing documents, allowing him to provide business insight and legal analysis to support informed decisions. He has also served as an active board member for a bank and participated in its commercial loan review committee.

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Community Service and Literacy Advocacy

 

Outside of his legal practice, Mark Arensberg has maintained a strong commitment to community involvement. For more than 20 years, he and his wife, Renny, have supported KVC Behavioral Healthcare through time and financial contributions. The organization assists foster children and families in crisis across multiple states.

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Literacy has been another important area of service for Mark. He has served as a reading mentor with Lead to Read, helping children strengthen reading skills and develop greater engagement with education. He has also contributed to Reach Out and Read and previously participated in the One-to-One Challenge.

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Mark’s community involvement includes support for youth programs, educational institutions, and health-related organizations. His contributions have supported groups such as the Girl Scouts, the University of Kansas Endowment, the University of Kansas Alzheimer’s Disease Research Center, local school foundations, the Leukemia & Lymphoma Society, the AdventHealth Foundation, and Catholic Charities.

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He also provides pro bono legal services to organizations such as the Gracious Promise Foundation, which assists individuals transitioning from incarceration. His past work as a youth sports coach reflects his interest in supporting young people through direct involvement and mentorship.

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Personal Life and Continuing Commitment

 

Outside of law and community service, Mark enjoys snow skiing, boating, and cycling. He will soon celebrate his 46th wedding anniversary with his wife, Renny. After raising four children, they now enjoy spending time with their nine grandchildren. He is also a dedicated dog owner and currently cares for two Golden Retriever-Labrador Retriever mixes.

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Across more than four decades of legal practice, Mark Arensberg has developed a career based on preparation, long-term relationships, and service. His ability to combine legal knowledge with practical business understanding has made him a trusted advisor for clients navigating complex transactional matters. As he approaches his 44th year in practice, he continues to demonstrate a commitment to helping businesses, individuals, and communities through both professional work and personal involvement.