Welcome to Whitegate
Welcome to Whitegate, your trusted partner in making sense of financial management systems. We’re dedicated to helping you better understand and get more value from your accounting tools, ensuring your systems support, not hinder, your success.
Our Story
Founded in 1990 by Tony Reissner, Whitegate began with a simple goal: to help organisations succeed with back-office technology. From those early days to today, we’ve stayed intentionally small, offering a personal, consistent, and experienced consultancy service tailored to each client’s needs.
Our Mission
Our purpose is to deliver financial management solutions that work; practical, proven, and honest. We take time to listen, understand your challenges, and provide tailored recommendations that lead to better reporting, smarter decision-making and greater control. We help you focus on what you do best; running your organisation.
Tony Reissner – Brief Biography
Tony is a finance and technology specialist with over 35 years’ experience helping organisations get the best from their accounting systems. He specialises in finance transformation consulting for not-for-profit organisations, with a particular focus on Students’ Unions and charities, combining deep knowledge of finance systems with a practical, people-centred approach to change.
Tony’s expertise spans the full finance transformation journey from diagnostic review and system selection through to implementation, process redesign and staff coaching.
He has worked with organisations using a wide range of finance platforms including Sage, Exchequer, Exact Online, iplicit, Twinfield and Access Accounts and has extensive experience managing migrations between systems.
As well as leading system change projects, Tony has served as interim Head of Finance for several organisations, presenting to Boards and Trustee committees and providing strategic support to senior leadership teams during periods of significant transition.
Tony’s clients include University of the Arts London Students’ Union, Exeter Students’ Guild, University of Sussex Students’ Union, Greenwich University Students’ Union, Stonewall and a number of other charities and commercial organisations across the UK.
Our Values
Our work is guided by principles that reflect who we are and how we serve:
Empowerment
Giving clients the knowledge and tools to take control.
Simplicity
Cutting through the complexity of systems to offer clear, workable solutions.
Integrity
Being honest, transparent, and dependable in everything we do.
Excellence
Maintaining high standards and attention to detail.
Innovation
Seeking better ways of working through technology and insight.
Collaboration
Building strong, open partnerships with our clients.
Sustainability
Acting with responsibility toward our community and environment.
What We Do
We specialise in accounting systems consultancy and interim services, with a focus on UK university Students’ Unions and small to mid-sized organisations, including not-for-profits and charities. Whether you need coaching, training, troubleshooting, or support through change, we’re here to help.
Our key services include:
Accounting system review and optimisation
System migration and implementation support
Training and user coaching
Interim financial management and reporting
Our Team
Whitegate is a family-run business led by Tony, supported by his wife Lisa, daughter Natasha, and son Joseph. Each contributing unique skills, perspectives, and creativity. We also work with a trusted network of external partners to offer a well-rounded service when needed.
Why Choose Whitegate?
When you work with us, you gain more than a consultant — you gain a partner who’s invested in your goals. Here’s what sets us apart:
Tailored solutions based on your needs and your sector
Hands-on support from real people who care about the outcome
Extensive experience in accounting systems and organisational transitions
Specialist knowledge of student unions, not-for-profits, and charities
System expertise across Sage, Exchequer, Exact Online, Access Financials, iplicit, Twinfield, and more
Migration experts – we specialise in helping organisations switch systems with confidence
Let’s Connect
We’d love to hear from you. Whether you have a question, need support, or just want to explore how we can help, please visit our Contact Us page to get in touch.
