Amphibious Excavators & Marsh Buggies
Built for dredging, wetlands, and the most demanding job sites — with Oshkosh 6x6 water trucks to match.
A specialty fleet for wetland, dredging & pipeline work.
O'Shea Equipment Company (OEC) is a specialty heavy equipment provider founded by Shamus O'Shea. We specialize in amphibious excavators — also known as marsh buggies or swamp buggies — for dredging, wetland construction, environmental remediation, pipeline, and civil projects across the United States.
Our fleet includes Caterpillar amphibious excavators (CAT 307E2, 312E, 330) outfitted with EIK long-reach booms, sticks, ditching buckets, and AM-series amphibious undercarriages. Based in Montgomery, Texas with units staged in Houston and Bryan, OEC ships nationwide.
Two categories, one job: get it done.
Purpose-built for the jobs standard equipment can't reach.
Discover the Perfect Tools for Your Project.
Talk with our team about availability, pricing, shipping, and custom configurations.