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Sarah Collins, Technical MD, Research and Development
Sarah Collins

Technical MD, Research and Development

Sarah joined RIFT in 2015 as a Senior Consultant specialising in the construction sector, becoming Head of Department in 2016. Sarah is a registered PRINCE2 practitioner and a qualified teacher. Seven years of experience within the public sector enable her to readily identify potential tax credit opportunities for clients. Combining her knowledge of government, HMRC and industry, Sarah is able to fluently translate the implications of practical on-site work into a successful claim.

Siobhan Zipfel, Operations Manager
Siobhan Zipfel

Operations Manager

As Operations Manager, Siobhan concentrates predominantly on performance management and the financial aspects of the R&D claim process. With 8 years of experience within the public sector, she has a keen eye for detail and a wealth of expertise in statistical analysis and investigative research. With an intricate understanding of software, database operations and customer relations, Siobhan is a specialist in the financial elements of the R&D reporting, from assisting with data collation to ensuring compliance and accuracy.

Oliver Batt, Senior Consultant and Technical Lead 
Oliver Batt

Senior Consultant and Technical Lead 

Oliver is Senior R&D Tax Consultant at RIFT. His expertise in taxation, finance and HMRC regulation allow him to maximise the claims of his clients. Oliver has over 6 years’ experience working in the financial industry, with in-depth knowledge and understanding of HMRC and the tax claim system. His background in communications is used to great effect when working on the technical narrative aspects of R&D claims, ensuring successful claims and maximising tax credits. A technical expert with exceptional writing skills, he's ideally placed to ensure clients get the full benefit of their innovations.

William Marshall, R&D Tax Consultant
William Marshall

R&D Tax Consultant

Will has been working in taxation for over 7 years, predominantly in personal income tax and business tax. As a result of this, he has assisted many different types of client with varying degrees of financial literacy. Ranging from subcontractors in the construction industry, to individuals working offshore and company directors. In his time working with RIFT Group, he has taken on a variety of different roles, including the training and development of other staff on technical matters, and within compliance, defending expense claims challenged by HMRC. He is a member of the Association of Taxation Technicians with a speciality in Corporation Tax. Due to his experience and a keen eye for detail, Will is adept at hunting through raw financial data and picking apart company accounts for qualifying research and development expenditure. This means that no stone goes unturned when maximising a company’s R&D tax relief.

Khrystal Adams, Client Coordinator
Khrystal Adams

Client Coordinator

Khrystal has vast experience within customer service, having worked in the industry for the last 8 years. She has held a variety of posts including Sales Advisor, Team Leader and Front of House Guest Advisor at a Marriott owned hotel in Amsterdam.  During this time she gained invaluable experience working with a variety of people and with a vast array of clients from varying and diverse backgrounds. Khrystals key skills include problem solving and overcoming challenges and issues all the while keeping the clients best interests at heart.

She has exceptional organisation and computer skills, utilising these to successfully analyse financial information, streamline processes and liaise with clients’ and report writers.

Jan Post, Chairman
Jan Post


Jan established the Rift Group in 1999. She holds a number of other directorships and is very active in the charity sector. Jan has built up close relationships with the construction Industry, and RIFT Group has served the construction's tax needs for over 18 years. She has been listed as one of the 40 most influential business leaders in Kent and has won numerous awards, including Woman of the Year in Construction and Business Woman of the Year.

Bradley Post, Managing Director
Bradley Post

Managing Director

Bradley started his career at Accenture as a Management Consultant, a position he held for 10 years. He has been with the RIFT Group since 2010, progressing through a variety of roles, from Sales and Marketing Director to Commercial Director. He took over as the company's Managing Director in 2016. Bradley has worked extensively with a variety of Blue Chip organisations on major business and system transformation projects. These have ranged from CRM Implementations and Business Analysis through to Project & Programme Delivery Management and Test Management.

John McKeown, Non-Executive Director
John McKeown

Non-Executive Director

John was involved in the “dot com” boom of the 2000's, with a successful project to his name. He has worked with RIFT for over 5 years and is a Non-Executive Director for the company. John has a background in finance, an industry in which he has worked since 1982. He was a qualified IFA for over 20 years, working with SMEs in all areas of taxation and investment and looking after shareholder interests. John’s current expertise lies within identifying R&D tax credits, working with Patent Box and locating grant and funding opportunities.

Kieran Brogan RIFT Operations Director
Kieran Brogan

Operations Director

Kieran was a founding member of the RIFT Group and has been at Jan Post’s side since the very beginning. Always hands-on, Kieran has worked in every department as it was created until it was running smoothly, giving him unrivalled knowledge and understanding of every aspect of the business.As Group Operations Director, Kieran has daily responsibility for Operations, Specialist Tax Refunds and Returns Teams, Admin and IT. Kieran has built up a centre of operational excellence within RIFT.

Jane Doherty Marketing Director
Jane Doherty

Marketing Director

Jane joined the RIFT Group in 2012 as Marketing Manager to establish and build an in-house marketing function. With strategic responsibility for marketing and commercial functions within the business, Jane has a proven track record of creatively delivering excellent top-line results and building the RIFT Group brand in new and existing markets. Prior to joining the RIFT Group, Jane spent over 10 years in marketing agencies where she headed up branding, marketing and PR projects for blue chip clients across multiple platforms and channels, resulting in a unique combination of client and agency-side experience.

Cathy Beare RIFT R&D Consultant
Cathy Beare

Non-Executive Director, RIFT Group

Cathy is a Finance professional with over 15 years board level experience.  She displays an entrepreneurial flair and has developed in-depth experience of family businesses, growth, restructure and acquisition.  During the time she spent at Holiday Extras it grew 10-fold delivering a turnover of £400m.   Cathy enjoys keep active including cycling, tennis and golf.

Mark Grimes Consultant
Mark Grimes

Non-Executive Director, RIFT Group

Mark joined RIFT Group in 2019, having a background of over 30 years in the IT sector, with 13 years in financial services at senior leadership level in the UK, as well as 6 years working in Asia. Marks wealth of expertise is widely recognised, holding non-executive and advisory positions across a whole host of businesses within the UK, as well as in his homeland, Ireland. When Mark isn’t in the boardroom, he is heavily involved with motorcycle racing, where he competes and has run teams at the highest competitive levels. 

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Our technical teams specialise in hunting down all your qualifying R&D costs and turning them into a serious financial boost for your business.

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