Epstein served as the architect and engineer of record, as well as the design engineer for MEP and structural engineering services, for the Mennica Legacy Tower, a two-building office development.

Epstein partnered with the design architect, Goettsch Partners, and helped guide this project through Warsaw's unique governmental approval process.

Mennica Legacy Tower features a 35-story tower located on the southeast side of the site and a smaller 10-story building on the west side, and is located in the Central Business District of Warsaw. Mennica is part of a newly-approved master plan that governs development in this area.

This project consists of approximately 100,000 gross square meters, with 80,000 gross square meters of Class A office space that includes a conference and a fitness center as well as ground level retail. Four levels of underground parking and ancillary services encompass the remaining 20,000 gross square meters. Between the two structures is a large open plaza that provides ample space for outdoor seating and a variety of landscape features.

Mennica's structural design features a collaboration between Epstein's Chicago and Warsaw offices. The tower structure is of cast in place concrete construction with a pile supported raft foundation under a central core that cantilevers up to 8.2m from its base footprint to deliver column free post-tensioned concrete flat slab interior spans. The 10-story building is also of cast in place concrete construction with a central core and post-tensioned concrete flat slab interior spans. The four below grade levels will include a perimeter slurry wall and will be built utilizing the "top down" construction method.

Mennica has been designed to achieve BREEAM certificate at "Outstanding" level.