One of the most celebrated of the abstract illusionists in the 1970s and 1980s, Lembeck received a BFA from Kansas University and an MFA from Yale in 1970, where he remained as an instructor in Yale's art department until 1972. Lembeck then established a career in SoHo, Manhattan as a professional artist, exhibiting his paintings with the Louis K. Meisel Gallery and nationally and internationally. His works are included in the permanent collections of the Guggenheim Museum, The Phoenix Art Museum, the Detroit Institute of Arts, and the Orlando Museum of Art, among others.
In 1994, Lembeck in collaboration with Jeremy Gardiner and Susan Banks, established LANDMIND to create a method for artists to become an influential and integral part of Miami's ever evolving environment by providing a forum of collaboration between artists, students and community members to share ideas, design and execute environmental art projects. Two key projects were the Brittle Star Park project at Miami Dade Community College and a project named Windscape in Bayfront Park, Downtown Miami, Florida.