Dr Jackson is an academic geriatrician. His primary research interest is in trying to understand how biological mechanisms of ageing are expressed clinically in older people, and how they differ in successful ageing, and unsuccessful ageing. This involves the biological basis of frailty and sarcopenia - as potential chronic expressions of unsuccessful ageing, and in delirium - as an acute expression of unsuccessful ageing. He led the MRC funded GEMM study, identifying underlying biological ageing mechanisms in multi-morbidity clusters, and has recently been awarded NIHR funding to trial Lidocaine, as an immune modulator, in people undergoing hip fracture repair to reduce post-operative delirium.  He was awarded the British Geriatric Society Rising Star for Research award in 2019, and supervises PhD students investigating acute sarcopenia, frailty in renal dialysis, and ocular and vascular risk factors for delirium.  He works clinically in orthogeriatrics and acute medicine.