Kennedy is co-owner of Hersco Ortho Labs, New York, New York, along with his younger brother, Cathal. He oversees and is a presenter for the pedorthics education program at the American Academy of Orthotists and Prosthetists (the Academy) Annual Meeting & Scientific Symposium and has authored and been interviewed for many articles related to pedorthics and foot and lower-limb biomechanics. Seamus speaks regularly on the manufacturing and fitting of custom shoes and orthotics. He is often called upon by OP&P practitioners and physicians to consult or help with unusual cases. Additionally, he is a member of The O&P EDGE Editorial Advisory Board.
Seamus was recently invited to sit on the board of the nonprofit Pedorthic Foundation and is currently working with the New York College of Podiatric Medicine, New York, to help develop its new pedorthic program.