Haradanahalli Ramaswamy Janardhana Iyengar (8 September 1908 – 6 February 1991) was an eminent Civil engineer in Mysore, India.

At this young age, he became the head of the family, and at the same time pursued the higher education that would lead to his accomplished career.

In 1939, partly as a result of the impending World War II, the government Military Engineering Services (MES) wanted to construct prisoners' barracks and other civic amenities at Jalahalli, now a subdivision of Bangalore.

In 1940, after the MEC experienced further growth, Janardhana Iyengar moved to Mysore, taking residence with his family in Vontikoppal.

This work of Janardhana Iyengar, Ramaswamy and Thirumalachar was appreciated by the government and the Dewan, Sir Mirza Ismail.

From 1944 to 1948 the MEC constructed numerous structures for the Mysore Steel Works, and cement and paper mills in Bhadravati (now in Karnataka).

Janardhana Iyengar's firm designed and constructed overhead tanks, in present-day Kerala, Pune and Uttar Pradesh.

In his tenure as Dewan of Mysore, Mirza Ismail was tasked with improving the state's infrastructure, and he was impressed with Iyengar's vision of using the Kaveri river's water basin for irrigation.

In this project, cost overruns resulted from demands to make the exterior of buildings veneered with polished granite: the slabs had to be obtained from the Doddaballapur quarry.

The power channel, which extends from the Sharavathi river's Linganamakki Dam to the Penstock entry point to feed 9 turbines, is lengthy and also covered at many places.

Iynegar's economical management and design skills earned the MCC large successes, as well as a good reputation with other engineers.

The campus, on Hunsur Road facing the picturesque Kukkarahalli lake, remains today a scenic locale, sometimes used for Kannada film shoots.

After a gradual retirement, in the late 1960s, Janardhana Iyengar helped his sons to form Bharat Engineering Corporation, and would act as an adviser and managing director of that company.

[2] The NIE maintains an endowed scholarship [1] in his memory, awarded to the student with the highest cumulative marks through all semesters.