Valuations

  • Irfan Arif

    Associate Irfan is a Associate working out of our Manchester office covering the North West region and brings a broad range of experience spanning both Public & Private sectors. Irfan qualified as a Chartered Surveyor and Registered Valuer in 2014 and worked for a Manchester based commercial firm before joining a national panel firm undertaking…

  • Hayley Mackenzie

    Associate Director Hayley is an Associate Director and RICS Registered Valuer, advising lenders and private clients across the Yorkshire and North East regions, approaching five years’ post-qualification experience, having qualified as a Chartered Surveyor in 2021. Hayley joined Graham + Sibbald following the acquisition of Aitchison Raffety in 2025 where she worked for more than…

  • Charlotte Ray

    Associate Director Charlotte joined Graham + Sibbald in February 2026, with 5 years PQE experience and over 10 years experience in property. Charlotte graduated from the University of York in 2014 and undertook a post-graduate qualification at Harper Adams University in 2015/16. Charlotte specialises in valuing commercial and residential Real Estate, including but not limited…

  • Ian Mollon

    Senior Director Ian Mollon came to the business through Graham + Sibbald’s acquisition of Aitchison Raffety. He is Head of Alternative Valuations at Aitchison Raffety, leading specialist valuation advice across a range of alternative property sectors including private and state schools and hotels. With over 20 years’ experience in the property industry, Ian brings a…

  • Georgina Walker

    Senior Surveyor Georgina join Aitchison Raffety in May 2024 and came to the business through Graham + Sibbald’s acquisition of Aitchison Raffety. She has over 10 years’ experience in Property, starting her career as an independent consultant, representing domestic and international investors. She later achieved her RICS accredited Masters degree from a Russell Group University,…

  • Emma Woolven

    Executive Director Emma came across to the business when Graham + Sibbald acquired Aitchison Raffety. Emma joined Aitchison Raffety in 2023 and was appointed Head of Valuations in 2025. Emma is a Chartered Surveyor and Registered Valuer and has developed a broad expertise across all major asset classes, with a particular specialism in the retail…

  • Gavin Keats

    Associate Director Gavin came to the business through Graham + Sibbald’s acquisition of Aitchison Raffety, after starting in Aitchison Raffety’s Valuation team in October 2021. He is experienced in a broad spectrum of commercial, residential and development assets throughout London, the South East and East Anglia areas. With over 23 years’ post-qualification experience, Gavin has…

  • Bob Wiseman

    Senior Director Bob is responsible for carrying out valuation and surveying work on residential property, including investment and development property, owner occupied property, ranging from country Listed properties to new build high end London apartments. Valuation work is primarily undertaken for secured lending purposes and survey work is primarily undertaken for acquisition purposes. Bob has…

  • Caroline Schmid

    Graduate Surveyor Caroline joined Graham + Sibbald following the acquisition of Aitchison Raffety in 2025, after starting at Aitchison Raffety in July 2025 – she is an avid and curious learner, who has worked in luxury procurement in the UAE, as well as hotel sustainability consulting for a PE fund in Geneva and underwrote 250m…