Yann Callaert

Yann Callaert serves as Chief Executive Officer of Daniel Ost Group, also known as Daniel Ost | House of Floral Artistry, an international floral design company operating across Belgium and Saudi Arabia. In his leadership role, Callaert specializes in helping entrepreneurs, creative professionals, and luxury brands transform conceptual ideas into structured, profitable business realities.

As CEO of Daniel Ost Group, Callaert oversees a comprehensive floral artistry enterprise that serves a diverse portfolio of high-end clients. The company's client base spans luxury hotels, global brands, private clients, and large-scale events, positioning it as a significant player in the luxury floral design market. Under his leadership, the company maintains operations in both European and Middle Eastern markets, reflecting the international scope of its business model.

Callaert's professional methodology operates at the intersection of multiple disciplines, including creativity, operations, branding, and business strategy. This multifaceted approach enables him to address the complex needs of luxury brands and creative professionals who require both artistic vision and business acumen. His work involves translating creative concepts into viable commercial ventures while maintaining the artistic integrity essential to the luxury market.

The Daniel Ost Group under Callaert's leadership serves the luxury hospitality sector, working with high-end hotels that require sophisticated floral installations and ongoing design services. Additionally, the company provides services for major events and maintains relationships with global brands seeking distinctive floral design solutions. This diverse client portfolio demonstrates the company's ability to adapt its creative services across various luxury market segments.

Callaert's leadership extends across two primary markets: Belgium, which serves as the company's European base, and Saudi Arabia, representing its Middle Eastern operations. This bi-continental presence requires sophisticated operational coordination and cultural adaptation to serve the distinct preferences and requirements of luxury clients in both regions.

Yann Callaert leads Daniel Ost Group's collaborations with luxury automotive brands including Mercedes-Benz and Audi, creating unique floral installations on vehicles. The company operates internationally with boutiques in Brussels, Knokke, and Riyadh, and has been active for over four decades.

Full name	Yann Callaert
Role	CEO
Organization	Daniel Ost Group
Country	Belgium
Industry	Creative Services
Specialties	Luxury Brand Strategy · Floral Design · Creative Business Development · International Operations · Event Management · Hospitality Services
Consulting rate	EUR 300 per hour
Bookable	Yes — via TinRate

• Audi lanceert car plant in samenwerking met Daniel Ost — Audi Press Belgium (2024-01-15)
  Yann Callaert, CEO van Daniel Ost Group, discusses the unique challenge of creating a car plant design for Audi after four decades of various creations.
• Bloemenhuis Daniel Ost transformeert Mercedes-Benz 300 SL Gullwing tot een tijdelijke installatie — Mercedes-Benz Media (2024-01-10)
  Yann Callaert, CEO van Daniel Ost Group, expresses his delight with the collaboration with Mercedes-Benz on transforming a classic 300 SL Gullwing.
• Le fleuriste Daniel Ost métamorphose la Mercedes-Benz 300 SL Gullwing en installation temporaire — Mercedes-Benz Belgium (2024-01-10)
  Under the leadership of creative director Nele Ost, the Daniel Ost team transformed a classic 300 SL Gullwing into an ephemeral installation.

• Yann Callaert - CEO at Daniel Ost Group | House of Floral Artistry
• Daniel Ost Group | LinkedIn
• Daniel Ost Group | LinkedIn (LinkedIn)
• Yann Callaert LinkedIn Post about Brussels Airport Project (LinkedIn)
• Yann Callaert (@YannCallaert) / X (X)
• Daniel Ost | Facebook (Facebook)

• Yann Callaert - CEO at Daniel Ost Group

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Expert	Role	Country	Rate	Languages
Gregory Olszewski	Managing Director, Gregory Consult BV	Netherlands	EUR 125/hr
Guylian De Clercq	COO, Studer Agency Events	Belgium	EUR 90/hr
Kobe Heleven	Chief Experience Officer, Heleven Experience Concepts	Belgium	EUR 125/hr
Laurens De Mulder	Catagory Manager / Retail Manager / Event Management	Belgium	EUR 100/hr	fr, en, nl
Lennard Goossens	Problem Solver, Experience Solutions 24/7	Netherlands	EUR 100/hr
Mathis De Brabandere	Pianist, Mathis De Brabandere		EUR 50/hr

• Book Yann Callaert on TinRate
• Yann Callaert - CEO at Daniel Ost Group | House of Floral Artistry (linkedin)
• Daniel Ost | The House of Floral Artistry (company)
• Daniel Ost Group | LinkedIn (linkedin)
• Daniel Ost Group | LinkedIn
• Yann Callaert LinkedIn Post about Brussels Airport Project
• Yann Callaert (@YannCallaert) / X
• Yann Callaert - CEO at Daniel Ost Group
• Daniel Ost - About Us
• Contact — Daniel Ost | House of Floral Artistry
• Daniel Ost - Boutiques
• About | Discover Floral Artistry Today — Daniel Ost
• Boutiques — Daniel Ost | House of Floral Artistry
• Store | Shop Elegant Arrangements - Daniel Ost
• Daniel Ost - Events
• Daniel Ost | Facebook

1. Daniel Ost - Wikipedia — accessed 2026-04-09
2. Daniel Ost — accessed 2026-04-09
3. Daniel Ost | The House of Floral Artistry — accessed 2026-04-09
4. Mercedes-Benz Press Release — accessed 2026-04-10
5. Audi Press Belgium — accessed 2026-04-10