About Us
A Network Built for the People Who Care for Animals
At Global Veterinary Excellence (GVE), we believe the best care for animals starts with the right support for the people who provide it.
That’s why we’ve built a growing network of veterinary clinics that share knowledge, resources, and clear clinical guidelines. Together, we maintain high standards and foster a positive work environment. We help teams make their work easier, better, and more enjoyable so they can focus on what truly matters: helping animals and working well together.
Our Mission
To deliver the best possible veterinary care by consistently advising and providing the highest quality clinical care, tailored to the unique needs of every individual animal and their owner.
Our Vision
To be the most connected veterinary group, where both people and animals are at the heart of everything we do. We value our colleagues and do everything we can to create a great place to work.
We’re Not Just Another Veterinary Group
What Makes Us Different
At GVE, we believe great care starts with people who feel good in their role. That’s why we’re building an environment where colleagues feel heard, supported, and appreciated. We invest in training, technology, and collaboration, and you’ll feel that in everything we do.
1. Quality Comes First
Our practices follow their own quality standards, a clear complaints procedure, and our veterinary health care plan, Healthy Pet Club, which makes preventive care more accessible. This ensures we consistently provide the best care for both pets and their owners.
2. Professional Growth
From extended CPD opportunities and personal support for new grads to intervision groups, leadership training, and quarterly check-ins: we help all team members continue growing. Together, we bring out the best in every individual.
3. Shared Decisions, Better Care
We make sure our teams have access to the right medications, equipment, and technology. Through our Clinical Advisory Committee (CAC), veterinary professionals have a direct voice in the decisions that shape their work.
4. Committed to the Profession and to Each Other
We’re actively engaged in the wider veterinary field: from participating in the Veterinary Sector Council to initiatives like “The Green Vet.” At the same time, we care deeply for our own people. We support teams through trusted contacts, team-building efforts, a Health & Safety dashboard, wellbeing ambassadors in each clinic, a Works Council, the Clinical Advisory Committee (CAC), and our Paraveterinary Advisory Committee.
5. Stronger Together
Unique to GVE is our Paraveterinary Advisory Committee: a platform where vet nurses can support, advise, and inspire one another and their clinics. In doing so, we’re not only improving care, but also building a stronger community within our practices.
Meet the Team Behind GVE
Our team is built on clinical expertise, operational experience, and a shared mission and vision. We want the very best for our colleagues, the animals in our care, and their owners.
We ensure every clinic can operate at its best by providing strategic direction, practical support, and shared resources so that teams can focus fully on what really matters: caring for animals and supporting their owners.
Discover who we are and what drives us to deliver the very best for our teams, our patients, and their people.
James Cahill
CEO GVE
James Cahill is an equine veterinary surgeon who practiced in the United Kingdom and the Far East. Returning to Ireland James owned and operated a range of various businesses before joining CVS group where he worked for 6 years holding a number of roles, Director of Operations, Director of Operations International, Director of Operations International and Equine, Group Business Development Director, and in the Europe culminating in Director of Clinical Operations with commercial and P&L responsibility for all clinical operations in CVS.
James then became Managing Director of CVS International, building an entirely new business for CVS in Australia through 2023 and early 2024.
In May of 2024, James acquired all of the Dutch and Irish Operations from CVS, and these practices have formed the basis of Global Veterinary Excellence.
Marleen Langen
Director of Operations Support and Projects
Marleen Langen (BSc. (Hons) graduated as a veterinary technician (paraveterinair dierenartsassistent) and Behavioural Therapist for dogs, cats, and rabbits. After completing her Animal Management degree in 2003, she worked for a year in a veterinary practice before joining Stichting AAP. There, she worked as team leader of the Mammal Department until 2011 and is still active as a volunteer.
Additionally, she has trained guide dogs for two years, an experience that has further enriched her work with animals. In 2007, Marleen became the chairperson of Vedias, the association for the paraveterinary professionals, where she advocates for the position and recognition of the profession.
Within CVS Netherlands, which became GVE in May 2024, she started as Operations Assistant and developed her career to Director of Operations Support and Projects, where she is also involved in purchasing alongside operations and projects.
Marion Wiersma
Practice Development Lead
Marion Wiersma graduated in 2000 as a companion animal veterinarian and then ran her own practice successfully for 18 years. After this period, she was ready for a change and sold her practice, after which she joined GVE in a management role. She has held several positions within GVE and now works in a supportive role as Practice Development Lead.
Marion is responsible for supporting affiliated GVE clinics wherever needed, both in management and clinical matters. She works closely with young colleagues to help them reach their full potential, supports colleagues in management roles, and remains clinically active within the on-call service group in her region. She also has a special interest in dentistry.
In her free time, Marion enjoys spending time with family and friends and loves taking city trips both in the Netherlands and abroad.
Carla Klinkhamer
Operational Assistant
Carla Klinkhamer started in July 2011 as a veterinary nurse at Nanda Veterinary Clinic in Zwolle. From 2020, she gradually took on more administrative responsibilities within the management team. Her role has since developed into Operations Assistant and Prevention Officer. She is also responsible for the administration of the Healthy Pet Club and for Health & Safety. Additionally, she has various tasks related to internal publications.
Carla is married to André, and they have two children, Arjan and Henriëtte, who have both now left home. She still cares for Bram, a cheerful Golden Retriever, and Guusje, a mischievous European Shorthair cat. In her free time, she enjoys boating with André.
Kim Landzaat
Operations Director
With over 12 years of experience as a companion animal veterinarian and a background in animal management, Kim combines her love for animals with a passion for leadership and collaboration. After graduating in 2009, she began her career in clinical practice, further developing her professional expertise. Over time, she focused on management, holding positions including Clinical Director, Senior Clinical Director, and Regional Director.
In her current role as Operations Director, Kim focuses on optimally supporting our teams and practices. She works alongside clinics to achieve our goals, with attention to growth, quality, and collaboration. In addition to overseeing daily operations, she is responsible for procurement and meets with practice owners considering joining GVE. Her goal is always to establish a partnership that is the right fit.
Kim is married with two children and a lively dog. In her free time, she enjoys going for runs or challenging herself in bootcamp workouts. She also loves sharing meals and drinks with friends and family.
Jessy van Deurzen
HR Manager
Jessy van Deurzen has been working enthusiastically at GVE since 2022. With a background in Human Resource Management (HRM), she focuses on creating connection and providing optimal support for people. She enjoys creating environments where people can grow and collaborate effectively. She finds energy in building a strong and positive workplace culture within GVE.
Outside of work, American football plays an important role in Jessy’s life. After many years playing the sport herself, she now continues her passion as a referee. This role requires discipline, fairness, and attention to detail — qualities she also applies daily in her professional work.
Marjolein van Leeuwen
Marketing Manager
Marjolein van Leeuwen began her career in 2008 as a veterinary nurse at the Companion Animal Clinic in Dieren. Over time, she found herself increasingly interested in behind-the-scenes work, such as practice support, marketing, and organization.
When the clinic joined CVS in 2016, Marjolein had the opportunity to fully focus on these areas for the Dutch practice network. She did not want to leave clinical work entirely, and in her current role at GVE, she has found the perfect combination, where her veterinary nursing expertise remains valuable. She works in practice support, internal marketing & communication, and photography. This combination ensures that no day is the same and allows her to continue combining her passions for animals, people, and communication.
In her free time, Marjolein enjoys life on their hobby farm with her partner and young son. It’s a lively household, with a cat, sheep, chickens, and rabbits.