Fe-based bulk metallic glasses (BMGs) are considered as potential structural materials owing to their high yield strength, high hardness and large elastic limit. However, their inherent brittleness limits their utilization as engineering materials. In situ Fe-based BMG composites were proven to exhibit superior macroscopic plasticity compared to monolithic BMGs [1]. Recently, powder metallurgy is emerging as an alternate processing route for the synthesis of BMG composites. Current study aims to investigate the possibility of synthesizing fully dense in situ Fe-based BMG nanocomposites via spark plasma sintering. The effect of sintering parameters on densification and crystallization was presented. Gas atomized Fe-based metallic glass powder of nominal composition Fe₅₇Cr₉Mo₅P₆B₁₆C₇ (at. %) was consolidated by spark plasma sintering. Sintering temperatures were selected in the range of supercooled liquid region (SCLR) to utilize the viscous forming behavior of the amorphous alloy powder to promote densification. Complete amorphicity was retained till 540^oC, whereas partial crystallization was observed in the samples sintered at the temperature of 550^oC and above. Predominant crystalline phases are found to be intermetallics such as Fe₅PB₂ and Cr₂B in the composite samples. TEM analysis revealed that evolved crystalline phases during sintering process are distributed uniformly in the amorphous matrix. Densification is observed to be improved significantly as sintering pressure is increased from 80 MPa to 400 MPa. Sintering pressure was optimized at 400 MPa and sintering temperatures was limited to 570^oC to enhance the densification and to control the devitrification respectively. Sintered compacts revealed good particle bonding characteristics with minimal porosity. Relative density greater than 98% was achieved for all the sintered samples. Hardness of the sintered BMG nanocomposites was observed to be higher than the sintered BMGs attributed to the evolution of hard intermetallic phases in the amorphous matrix during devitrification.