Joost Balthazar Onderwaater

Joost Balthazar Onderwaater

- Sales & Marketing Professional -


An ambitious and driven Sales and Business Professional, with over seventeen years managerial and client handling experience in the ICT & Fashion segment (wholesale & retail). A bilingual, effective communicator, who combines strong industry knowledge with excellent negotiation skills.  A proven track record of identifying and maximizing sales opportunities and delivering successful results in high-pressured, target-based environments. 

Work History

Work History

K3 Unisoft B.V.

Sep 2014 - Present

Sales New Business -  Retail & Wholesale

K3 Unisoft – founded in 1985 – provides innovative store solutions to retailers in fashion, footwear, sports retail & department stores and is a leading Point-of-Sale supplier.

Responsible for:

  • Manage New Business Retail & Wholesale Northern Europe

INsty!e Fashion Group B.V.

2009 - 2014

Founder & Managing Director

INsty!e Fashion Group BV, a Dutch distributor with a passionate eye for fashion, was founded by Joost Balthazar Onderwaater in 2009.

Responsible for:

  • Manage International Agents & Distributors for wholesale           
  • Marketing & Sales: key accounts retail/international Fashion Fairs: Modefabriek A'dam, Panorma Berlin & Moda Birmingham 
  • Trend Analyses: Shape/Fabric/Color/Trims/Labels
  • Design: Trousers & Shirts/Size Specs/BOM/Technical pack   
  • Supplier Sourcing: Turkey/Italy/Portugal/India
  • Production: Lab Dips/Planning/Samples/Quality Control
  • Branding: Labels/Hangtags/Packaging
  • Pricing: Target Profit Margin/landed Price/Wholesale Price/Incoterms    
  • Shipment & distribution: warehousing/transportation/insurance                                                                                                                                                                                                                

Ultimo Software Solutions B.V.

Jan 2006 - Jan 2009

International Sales Manager

Ultimo Software Solutions is a supplier of flexible software for effective maintenance and facility management.

Responsible for:

  • New Business Sales Northern Europe
  • Managing Sales Team
  • New Office Belgium                                                                                                                                                

Datastream Systems B.V./Infor

Jan 1997 - Jan 2006

Sr. Key Account Manager

Infor EAM (Enterprise Asset Management) enables manufacturers, distributors, and services organizations to save time and money by optimizing maintenance resources, improving equipment and staff productivity, increasing inventory efficiency, and strengthening their ability to collect on warranty-related claims.

Responsible for:

  • Sales New Business Benelux



HES Rotterdam

1992 - 1996

Bachelor of Commerce (B Comm)

Midveld College

1988 - 1992




Sales & Marketing

Excellence sales & marketing skills

IT & Fashion Network

Strong International IT &  Fashion network


Effective use of communication and understanding client’s needs & expectations


NAV - Pebbelstone Fashion - Retail Vision Enterprise - AFAS - Apple/Windows - MS-Office - Photoshop & Illustrator


Fluent speaking and writing


Fluent speaking and writing


Basic speaking and writing


Basic speaking and writing



Paul R. Wineman (USA)

1999 - Present


Negotiation training | Solution selling

DOOR Training & Coaching

Jan 1998 - Jan 2004


Customer oriented sales | Commercial negotiation | Account Management                     


Contact Info.