OCN Ritma Erat (formerly Ritma Erat Sdn. Bhd.), was established in 2003 by the former management team of Pentagon Engineering Sdn Bhd, following their take over by Transwater Berhad.
OCN Ritma Erat provides mechanical engineering design and construction services to agro-based industries, oleo chemical, oil and gas, and other related industries. Its main area of expertise is with the provision of design and build services to the green energy sector, where its significant experience with the design and construction of bio-diesel, bio-gas, and bio-mass fuelled power plants is widely recognised.