At which of the post has Lal Bahadur Shastri not served in his lifetime?

President of the Indian National Congress

Lal Bahadur Shastri has not served as the President of the Indian National Congress.

A prominent figure in India's history, this individual served as the Prime Minister of the country. His involvement in the freedom movement dates back to 1930. Notably, he held ministerial positions within the Uttar Pradesh cabinet. Progressing in his political journey, he became the General Secretary of the Congress party.
He held ministerial roles in the Union Cabinet from 1951 to 1956. His resignation as the Railway Minister during this period was linked to a significant railway accident, a move that highlighted his sense of accountability. Later, he resumed his ministerial duties from 1957 to 1964.
Shastri's tenure as Prime Minister came to an unexpected conclusion on January 10, 1966, with his sudden passing in Tashkent, a city then located in the USSR (now the capital of Uzbekistan). He was in Tashkent to engage in discussions and finalize an agreement with Muhammad Ayub Khan, who was serving as the President of Pakistan at that time.