Our Team

Meet Our People

The GRSA INTERNATIONAL Team is made up of some of the best stringers and experts in the industry. To be eligible for a role in GRSA whether it be as a country manager, tester, or to be authorised to teach and give GRSA workshops, nothing but the best will do.
Richard Parnell

GRSA President & Grand Master (Executive Instructor)

Richard Parnell

Introduction

Leads the team of experts. Richard has 30 years of experience in the world of tour stringing, having worked with the best players over the years either at Grand Slams, Davis Cup events and on the ATP & WTA Tours. Richard has been teaching & giving workshops around the world for the last 20 years using his “Aggregation of Marginal Gains” methodology that achieves amazing results.

Nick Down

GRSA INTERNATIONAL – Global Director – Squash

Nick Down

Introduction

Looks after everything that is Squash. Nick’s experience in squash stringing is unrivalled and he really deserves his Squash Stringing “Guru” status. Nick has looked after the best squash player’s needs for the last 20 years at all the major tournaments and World Championships.

Martin Mann

GRSA INTERNATIONAL – Chief Instructor - Germany, Austria & Switzerland

Martin Mann

Introduction

Has been stringing on the tour for years and is looking after Austria, Germany & Switzerland. Martin has a wealth of experience at organizing, stringing and running ATP & WTA tournament stringing services of the highest level as well as having been part of the team at the Olympic games in Tokyo, Japan.

Roger Henry

GRSA INTERNATIONAL – Instructor - Ireland

Roger Henry

Introduction

Is a Grand Slam Stringer and in charge of GRSA in Ireland. As an accomplished tennis coach as well as a stringer, Roger brings extensive experience & knowledge to product testing and player recommendations.

George Pahiakos

GRSA INTERNATIONAL – Instructor - Greece & Cyprus

George Pahiakos

Introduction

I strung my first racket back at 1990 at age 17 and till now, i’ve already strung more than 140.000 rackets. From 1997 I have my own exclusive tennis store in Glyfada, a suburb of Athens. I was on the Eleni Daniilidou’s team, Greek Champion and world number 14 back in 2003.

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GRSA International HQ – Operations Manager

Daniel Efford

Introduction

Managing & coordinating the GRSA International team that covers all the bases when it comes to racket sports.

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GRSA INTERNATIONAL – Global Director - Badminton

Mark Goodman

Introduction

Mark has participated in many major tournaments and has provided advice to some of the best players in the world. A true reference in the stringing industry, and when it comes to Badminton, one of the most knowledgeable professionals in the world.

Daniel Peniza

GRSA INTERNATIONAL – Instructor - Venezuela & Colombia

Daniel Peniza (Dani)

Introduction

Stringer since I was 27 years old and professional tournament stringer since 2008. I've worked alongside the Colombian National Team at the Davis Cup.

Nico Ionesco

GRSA INTERNATIONAL – Instructor - Canada

Nico Ionesco

Introduction

Stringing from the age of 13 and a professional tournament stringer since 2015. Worked in collaboration with stringing teams worldwide (Head, Yonex, Wilson) for the past 6 years.

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GRSA INTERNATIONAL – Instructor - Australia

Noel Dodds

Introduction

I played junior tennis to a high state and national level here in Australia with aspirations go to college tennis in the USA but this did not eventuate.

REN

GRSA INTERNATIONAL – Advanced Instructor - China

JIACHEN REN

Introduction

Stringer at China Open, Madrid Open & multiple GRSA Workshops in China.

Kenneth

GRSA INTERNATIONAL - Chief Instructor - ASIA

Kenneth Leong

Introduction

Kenneth has experience in many areas, he's been involved with sports and personal training, continuously adding knowledge in different fields as his passion for the racket sports world has grown. GRSA saw an opportunity in Ken, someone hungry to grow, sharing very similar values and visions. Great things to come from South East Asia.

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GRSA INTERNATIONAL – Instructor - USA (Texas)

Mark Gonzalez

Introduction

Thirty-eight years working In tennis retail, manufacturing, and wholesale. Sold and repaired stringing machines for Alpha Racquet Sports. Collaborated on design and product testing forAlpha.


Assisting In various stringing projects for Yonex USA.

Symposium seminar leader.

Mark JG

GRSA INTERNATIONAL – Instructor - Netherlands

Mark Jan Greebe

Introduction

Residing in Bussum, he brings years of experience, passion, and expertise to the GRSA International team.

Mark Jan is a tennis specialist at Intersport in the Netherlands, where he customises rackets and advises clients.

As a father of four and a grandfather of one, he treasures the peaceful focus stringing brings him in his otherwise busy days.