Brian Baynes is a serial technical founder who built multiple deep-tech and biotech companies (Midori Health, Kaleido Biosciences, Celexion, Codon Devices) before becoming a founding partner at Pillar VC, giving him hands-on experience across synthetic biology, microbiome therapeutics, and animal health. He co-founded Petri alongside Pillar VC, a creation-focused program for frontier bio startups, and maintains a long-standing role as Venture Partner at Flagship Pioneering where he serves on investment committees and company boards. Brian Baynes is a serial technical founder who built multiple deep-tech and biotech companies (Midori Health, Kaleido Biosciences, Celexion, Codon Devices) before becoming a founding partner at Pillar VC, giving him hands-on experience across synthetic biology, microbiome therapeutics, and animal health. He co-founded Petri alongside Pillar VC, a creation-focused program for frontier bio startups, and maintains a long-standing role as Venture Partner at Flagship Pioneering where he serves on investment committees and company boards.