Sine Qua Non: the essential ingredient

Working in unison to meet client goals

Meet the Team

We are a small team of accessible, friendly, hard working, diligent, socially savvy, business-minded, agency professionals, who put clients at the heart of everything we do. As a team, we embrace and aim to embody the values of respect, integrity, quality, persistence, courage, ambition and positivity.


We are always looking to meet like-minded, talented people with relevant experience who would be interested to join our team. If that sounds like you send us your details, and we will contact you. Alternatively you can click here to view a list of our current vacancies.

  • Claire Ritchie

    The Networker.
    CEO Claire founded the business in 2001 after a successful career in the technology sector and is still passionate about the power of sponsorship in telling stories, engaging audiences and sparking action.

    Claire Ritchie Linked In
  • Chris Ritchie

    The Debater.
    COO Chris is actively involved in all aspects of the business as befits his curious (aka nosey) character that is always up for a debate.

    Chris Ritchie Linked In
  • Chris Hughes

    The Postman.
    Client Service Director, Chris, a natural communicator and impresario, is always focused on exceeding client expectations, and is only interested in delivering the right solution at the right time.

    Chris Hughes Linked In Chris Hughes Linked In
  • Dan McLaren

    The Digitizer.

    Dan Mclaren Linked In
  • Stuart Owen

    The Wicketkeeper.
    ESA Diploma graduate Stuart is a safe pair of hands for all clients he manages. His enthusiasm for the sponsorship industry is only matched by his passion for thunderstorms!

    Stuart Owen Linked In
  • Kirk Brown

    The Magician.
    Pick a creative challenge, any challenge: digital, web, design, video. Despite modest protestations, Kirk always comes up with the answer that is on your card!

    Kirk BrownLinked In
  • Carrie Mathieson

    The Juggler.
    Originally, and still obviously, from north of the border but also fluent in German, Carrie, combines a talent for multi-tasking with a down to earth ability to get stuff done.

    Carrie Mathieson Linked In
  • Hazel Wilkes

    The Artist.
    Whether she’s producing hand rendered typography, taking photos or highflying on the trapeze, Hazel loves a creative challenge!

    Hazel Wilkes Linked In
  • Sam Wright

    The Flash.
    Not only fast on the field but good at turning around projects with short deadlines. If speedy ideas are something you need he will be with you in a flash.

    Sam Wright Linked In


Sine Qua Non International Ltd
Chiltern House
45 Station Road
Henley-on-Thames, Oxon
United Kingdom

Tel +44 (0) 1491 845 420

Sine Qua Non International Ltd
Unit 23
Sadler Bridge Studios
United Kingdom

Tel +44 (0)1332 913050

Contact Us

noun [S] /sine kwa: no:n/ a necessary condition without which something is not possible