Petar Suman is a PhD student working with Professor Paul Shellard and Professor James Fergusson on finding primordial non-Gaussianities in the CMB bispectrum. In his work he develops and apply Modal CMB bispectrum estimator pipeline to test and constrain new physics of the early Universe. Recently he has been focusing on cosmological collider physics and finding signatures of scalar and vector massive exchanges. In addition, he is interested in open EFT of inflation, producing first ever observational constraints on dissipative bispectrum. Although his work currently utilises latest Planck legacy data, he is also a member of Simons Observatory, and is looking to improve and extend the Modal estimator for the upcoming SO survey. With the increased resolution and improved accuracy, he aims to achieve even tighter constraints on primordial non-Gaussianities.