Management Engineering Associates LLC

MacKay Sposito is a values-driven consulting firm with over 50 years of experience shaping infrastructure that strengthens communities. From civil engineering and landscape architecture to environmental permitting and beyond, we prioritize people, partnerships, and long-term impact. Rooted in our values, we're expanding our reach throughout the western U.S. to deepen our service to clients and amplify our positive impact on the communities we serve.

For more than 35 years, Ultrablock Inc. has been manufacturing Lock-Block retaining wall system. Based in Vancouver, Wash., the firm offers a series of block products, such as wall systems, jersey barriers and wheel stops. Its product is used for containment bunkers, bulkheads, seawalls, wingwalls for bridges, barriers, retention ponds, culverts and wine storage facilities. The company also manufactures blocks for slope protection, landslide repairs as an alternative to crib-walls, gabions, rock/boulder walls and timber lagging.