Sirena Yachts has appointed Ensar Çabuk to lead its US operations, with long-serving US chief Constantinos K. Constantinou moving into a senior advisory role as the Turkish builder expands across the Americas.
Sirena Yachts has appointed Ensar Çabuk to lead Sirena Yachts USA, placing a long-serving naval architect and commercial executive in charge of the Turkish builder's American operations as the company expands its presence across the Americas and moves further into larger yacht categories.
The appointment forms part of a leadership transition rather than a complete departure at the top of the US business. Constantinos K. Constantinou, who has led Sirena Yachts' American operations since 2018, is moving into a senior advisor role and will continue contributing to the company's strategic and commercial development in North America.
The change comes at an important stage in Sirena's development. The company has expanded beyond its established production motor-yacht range into larger yachts, including the first Sirena Superyachts 42M launched this summer, while continuing to build its international dealer and customer-support network.
Çabuk brings an unusually technical background to the commercial role. A naval architect and marine engineer with a master's degree in yacht design, he joined Sirena Marine in 2011 as a design engineer before becoming project manager for development of the Sirena 58 and Sirena 64.
His career later moved toward sales and international business development, including work expanding Sirena's dealer network. In 2023, he relocated to Fort Lauderdale as country manager for Sirena Yachts USA, working alongside Constantinou and developing relationships with dealers, owners and other industry partners across the region.
That combination of engineering and commercial experience is particularly relevant as Sirena moves into larger yacht categories. Selling a production motor yacht through an established dealer network and supporting an owner considering a 40-metre-plus project require different levels of technical discussion, after-sales support and long-term customer engagement.
Çabuk is therefore taking control of the US operation with experience on both sides of that equation: he has worked on the development of Sirena yachts themselves and later on the commercial network responsible for placing them with owners.
The transition does not represent a clean break with Sirena Yachts USA's existing leadership. Constantinou, who has headed the American operation since 2018, will remain with the business as senior advisor.
During his tenure, Sirena expanded its presence across the United States and North America, developed its dealer network and strengthened relationships with owners and commercial partners. His continuing involvement provides continuity at a time when the company is simultaneously broadening its product range and developing its ambitions in larger yachts.
That continuity can be commercially important. Relationships between yacht builders, dealers and repeat owners are often developed over many years, and a leadership transition risks disrupting those connections if it is treated simply as a replacement. Sirena's structure instead retains Constantinou's experience while putting day-to-day leadership in the hands of an executive who has already worked within the US organisation since 2023.
Çabuk's new remit includes strengthening Sirena's market presence, supporting customers, developing the dealer network and extending the brand's reach beyond the United States into the wider Americas.
The timing gives the appointment greater significance than a routine management change. Sirena Marine has recently moved into steel-and-aluminium superyacht construction with the first Sirena Superyachts 42M, marking a significant step beyond the company's established composite production-yacht range.
Superyacht Guide reported the launch of the first 42M on 5 August, ahead of the yacht's planned Monaco appearance. The programme introduces Sirena to a market where owner relationships, technical support, project management and long-term after-sales engagement become increasingly important.
For the US organisation, that creates a broader commercial proposition. A client considering an established Sirena production model has different expectations from an owner entering a substantially larger semi-custom or custom yacht project, even where the same brand sits behind both products.
Çabuk's engineering background therefore has particular relevance. His earlier involvement in yacht development gives him technical experience that can complement the dealer-management and commercial responsibilities associated with leading one of Sirena's most important international markets.
Fort Lauderdale places Sirena Yachts USA in one of the world's most important centres for yacht ownership, brokerage, service and sales. Sirena's official dealer network continues to list its US operation in Fort Lauderdale, giving the company a base close to a large concentration of owners, dealers, brokers and marine businesses.
The company's ambitions extend beyond the United States. Sirena says the objective is to consolidate its growth across the US while expanding its presence more broadly throughout the Americas. That means further developing dealer relationships while ensuring that sales growth is supported by the ownership and after-sales experience expected by customers.
The leadership change also arrives as Sirena prepares to present its larger-yacht ambitions to an international audience during the autumn show season. The Monaco Yacht Show in particular places the company alongside builders, designers, brokers and owners operating firmly within the superyacht sector.
For Sirena, the challenge is no longer simply to increase unit sales in the United States. The company now needs an American organisation capable of supporting a wider range of yachts and increasingly sophisticated owner requirements.
With Çabuk progressing from design engineering through project management, sales and US country management before taking responsibility for Sirena Yachts USA, the company has chosen an internal successor with more than 15 years of experience within the organisation. Constantinou's continuing role as senior advisor, meanwhile, provides continuity as Sirena attempts to turn its established American presence into a platform for its next stage of growth.