Martenson & Eisele's Land Development Specialists. Martenson & Eisele is a prominent firm based out of Neenah/Menasha since 1997. They have been building stunning structures. Our designs are inspired by urban environments and emphasize beauty, flexibility, purpose, and functionality. Our passion is what drives us and we know it's our clients who matter most. Contact us to find out more about what we do and how you can benefit from our expertise. Martenson & Eisele has two offices in Menasha, Wisconsin. They also have a branch in Omro. We are dedicated to helping clients plan, design, and build better communities. We have been providing a wide range of top-quality services for your next building project since 1977. Planning: For your community, we provide comprehensive planning services, which include grant writing and other land development services. Environmental Assessment: Reduce the impact of land developments on the environment. We protect the natural world with environmental assessments. Land surveying, boundary survey and topographic survey are all available.