GMSS Holdings Expands Executive Team With JJ Pistoor, Andrew Marenco

WOBURN, Massachusetts—GMSS Holdings, the parent company of Geriatric Medical and DDP Medical Supply, announced executive leadership promotions of JJ Pistoor and Andrew Marenco. The company said the promotions aim to support continued growth and operational alignment across its long-term care and durable medical equipment (DME) distribution platform.

JJ Pistoor has been promoted to chief revenue officer (CRO). Since joining the company in 2018, Pistoor has led initiatives focused on market expansion, customer engagement and revenue performance. In his new role, he will oversee sales, business development, marketing and customer success functions across both Geriatric Medical and DDP Medical Supply. He is also active in industry advocacy through leadership roles with national homecare and DME trade associations.

Andrew Marenco has been appointed chief financial officer & chief operating officer (CFO & COO). Marenco joined the company as CFO in 2021 and has led efforts to enhance financial reporting, strengthen capital planning and support operational scalability. In his expanded role, he will continue to oversee finance while assuming responsibility for operations, including supply chain, logistics and organizational execution across both businesses.

“These leadership appointments reflect the continued evolution of our organization as we scale to meet the needs of providers across long-term care and DME markets,” said Jeffrey Siegal, CEO of GMSS Holdings. “JJ’s leadership across revenue functions and Andrew’s expanded operational oversight position us to further align strategy and execution while maintaining the service model our customers depend on.”