David Buller is the CEO of Buller, angel investor, and Venture Partner at Ascension Ventures. An entrepreneur since he was 15 years old, David founded Avantec (hospital supplies and pharmacy automation), which was acquired by Omnicell in 2015. He works with investors, syndicates, VCs, accelerators and startups in the UK, Europe and US as a startup advisor and mentor, helping them raise capital and investors find funds and deal-flow.