Tom Willis

Tom Willis, PhD, is a genomics entrepreneur with more than 20 years of company-building experience who became CEO of Arima Genomics in June 2025. A Yale and Stanford physicist turned biotech serial founder, he co-invented Molecular Inversion Probe technology, built two genomics companies from the ground up - ParAllele BioScience (acquired by Affymetrix) and Sequenta (whose ClonoSEQ assay became NCCN-standard for leukemia and lymphoma residual disease testing) - then spent a decade as Venture Partner at Illumina Ventures before stepping in to lead Arima, a company pioneering 3D genomics for cancer diagnostics.