Mark Koellner

Executive Director of Business Development and Client Care

Mark Koellner has over 30 years of experience in the environmental sciences field with extensive knowledge in virtually every facet of environmental sciences consulting, including site assessment and remediation, hydrogeological investigations, natural and cultural resources, underground storage tank management and bioremediation studies. As the Executive Director of Business Development and Client Care at BL Companies, Mark plays a pivotal role in the company’s success and growth.

Mark’s journey with BL Companies began in June of 1998 when he joined the company after his former small consultancy firm was acquired. This acquisition marked the inception of BL’s Environmental group in Pennsylvania, and Mark played a crucial role in shaping its development.

Over the years, Mark displayed an aptitude for business development. Recognizing his passion for fostering relationships and identifying opportunities, Mark shifted his focus towards account management and business development, ultimately becoming an integral member of the company’s executive team. His commitment to understanding each client’s unique needs and aligning BL Companies’ services accordingly has led to exceptional client experiences and continued growth.

As a leader, Mark believes in open communication and clear expectations. He allows his team members the autonomy to work through assignments on their own while providing them with the necessary support and guidance. Respect, kindness, honesty, and integrity form the foundation of his leadership style, fostering an environment where individuals feel valued and understood.

Mark points towards BL’s Employee Stock Ownership Plan (ESOP) culture as a feature that sets BL Companies apart, emphasizing the sense of ownership and pride among the firm’s employees. This unique approach, combined with the company’s client-centric focus, has garnered a reputation for responsiveness and building enduring relationships with clients.

Mark’s journey exemplifies the perfect blend of technical expertise, passion for people, and dedication to fostering a company culture that drives BL Companies’ continued success.