Meet The team

Professional, friendly and highly trained experts dedicated to keeping homes and buildings healthy.

At JAG, we believe that people make the difference. Damp and mould can be worrying for residents, especially in homes with young children, elderly relatives or vulnerable tenants, so the experience you have with the person at your door matters just as much as the service itself.

Our team of surveyors, technicians and support specialists are chosen not just for their skills, but for their empathy, professionalism and commitment to doing things the right way.

Whether we’re supporting a homeowner for the first time, a landlord managing multiple properties, or a housing provider working under Awaab’s Law, you’ll always meet someone who is calm, respectful and focused on clear communication.

Every surveyor at JAG is trained to deliver independent, evidence-based assessments, ensuring you receive clear advice without upselling or unnecessary works. This independence is a huge part of what sets our team apart.

We invest heavily in professional development, including:

IRCRC certification
Dewpoint-approved training
PCA qualification pathways (in progress)
Regular CPD on new products, mould behaviours and diagnostic technology

Combined with real-world experience and more than 2,500 properties surveyed across the UK, you get a team with the confidence and knowledge to diagnose issues accurately and explain them in a way that feels manageable, not overwhelming.

James Gilbert

Managing Director

James Gilbert is the founder of JAG and a specialist in residential and commercial damp, mould, and building pathology.

With a practical, evidence-led approach, James helps homeowners, landlords, and managing agents understand the true causes of damp, mould, and moisture problems and avoid unnecessary or ineffective remedial works.

His focus is on clear reporting, impartial advice, and solutions that resolve the issue.

James Shaw

Partner and Business Development

James has over 40 years of experience in the Housing sector across Central Government, Local Government, Housing Associations and Contractors.

He has held 14 senior positions in Social Landlords, including G15 organisations, medium-sized landlords and small landlords.

He has contributed to nationally published studies for the Central Government and has produced work in the past for the Hong Kong Government.

James previously Chaired Rosebery Housing Association in Epsom for over 10 years.

He has worked as a consultant in the Social Housing sector since 2002, advising and assisting a variety of organisations.

James’ claim to fame is meeting some of the most famous people on the planet, including David Bowie, Muhammad Ali, George Foremen and Joe Frazier (you might need to be a boxing fan to appreciate it)

Stevie Lisher

Customer Service Manager

Stevie has 2 passions in life – People and Planning. Stevie’s career in planning started 31 years ago. She has worked across various sectors such as corporate events, children’s parties, building and restoration, insurance repairs, and over the last 4 years, she has brought her wealth of knowledge and experience to the housing sector.

Stevie has been an integral part of the JAG team for over 18 months, taking control of the customer service process. As a new customer, Stevie will be your point of contact, ensuring a smooth booking and that you are comfortable with the process of working with JAG.

Stevie’s claim to fame is being able to name any song and the artist from 80’s!

Hannah Johnston

Customer Success Manager

Hannah joined JAG in 2025, and not because she is an expert in damp and mould or an esteemed planner like Stevie, but because of her passion for people and in her role as Customer Success Manager, this passion is key.

Hannah’s early career has been in customer-facing and focused roles, and since joining the JAG team, she has brought fresh ideas and energy to our residents and customers’ journey.

Once your initial survey is complete, Stevie will pass you over to Hannah. Ensuring a fast transition, getting your PDF report from the surveying team over to you, making sure any questions you might have are answered and communicating the next steps of the process.

Hannah’s claim to fame is being the most boring person in Berkshire!

Senior Surveyors

Our senior surveyors bring years of experience in damp diagnostics, building pathology and environmental assessment. Their role is simple: to understand what’s happening in your property — and why — using thermal imaging, moisture mapping, ventilation analysis and construction knowledge.

They’re trained to spot issues that many contractors miss, such as hidden leaks, cold bridging and ventilation failures. More importantly, they explain their findings in clear, human language so you feel confident at every step.

Surveying Team

Friendly, respectful and meticulous, our surveying team works across homes, care environments, rental properties, HMOs and commercial buildings. They understand the sensitivities involved in entering someone’s home and always prioritise comfort, clarity and respect.

Their goal is to give you the clearest possible understanding of your problem — without judgement, pressure or assumptions.

Our remediation and repair technicians handle the practical side of the work: safe mould removal, COSH-free treatment application, and completing the repairs needed to stop damp and mould returning.

They specialise in: