During construction of road, engineers often encounter problematic foundation soil such as presence of marshy ground enriched with soft organic peat. Dealing this heterogeneous geotechnical material with wide variability is too challenging. Replacement of such soils by good quality soil involves huge cost. The present study attempted stabilization of organic peat using cement collected from a road construction site at Tripura, North East India. Engineering behavior characterization of peat layer such as unconfined compressive strength (UCS) and resilient modulus (MR) were investigated in this study considering with and without improvement. Cyclic loading (Haver sine signal) under triaxial pressure condition in the laboratory was simulated to calculate the MR. with different percentage of cement addition (0%, 3%, 6% and 9% cement). Results indicate significant improvement in strength and stiffness of peat after application of cement and addition of 9% cement shows highest resilient modulus and UCS value. The maximum increase in MR was found to be observed in the order of 200% and 650% after 28 days with variation of percentage of cement of 3% and 9% respectively. Hence, this study indicates the efficiency of cement for stabilizing organic peat in road subgrade.