Based in Naples, Italy, O.N.I. Officine Navali Italiane SpA is a prominent provider of mechanical engineering, maintenance, and repair services dedicated to the maritime, superyacht, and energy sectors. Founded originally in 1945, the company has operated for decades within the heart of the Mediterranean shipping industry. Its trajectory shifted significantly in 1968 under the leadership of engineer Pier Luigi Fenelli, who reorganized the business to focus on high-precision mechanical support and industrial plant engineering. Today, the firm functions as a specialized technical partner for shipowners and operators, managing complex repair projects that require both workshop precision and on-site flexibility.
The company’s operations are centralized at its facilities near the port of Naples, a strategic hub that allows for rapid deployment to vessels throughout the region. While historically rooted in general ship repair, the organization has evolved into a multi-divisional entity with distinct operational focuses. The Naval division caters to commercial shipping, providing essential support for merchant vessels that require routine maintenance or emergency interventions. Simultaneously, a dedicated Superyacht division addresses the rigorous aesthetic and technical standards of the luxury yachting market, offering services that range from propulsion system overhauls to auxiliary machinery repairs.
A defining characteristic of O.N.I. is its deep technical specialization in marine propulsion and power generation. The company is widely recognized for its expertise with large 2-stroke and 4-stroke engines, operating as an authorized service partner for major engine manufacturers. This technical capability extends beyond simple component replacement; skilled technicians perform complex tasks such as crankshaft regeneration, turbocharger revision, and the reconditioning of cylinder liners and pistons. These critical interventions help extend the operational lifecycle of marine assets and ensure compliance with stringent performance standards.
Beyond the waterfront, the company applies its marine engineering heritage to the broader energy and industrial sectors. This cross-sector approach allows technical teams to transfer knowledge from high-stakes marine environments—where reliability is non-negotiable—to land-based power plants and industrial facilities. Whether deploying riding crews to troubleshoot issues at sea or machining heavy components in their Naples workshop, O.N.I. Officine Navali Italiane SpA remains a steadfast technical resource, bridging the gap between traditional maritime craftsmanship and modern mechanical engineering.
