Complex sentence: The company established on 20th January 2000 by Yogesh Garg (1975-2012), soon after his death the company is operating under the wing of Mrs. Shashi Gargh widow of the founder and current Managing Director of Infraline.
Split into simpler sentences: The company established on 20th January 2000 by Yogesh Garg (1975-2012). Soon after his death the company is operating under the wing of his widow, Mrs. Shashi Garg, now Managing Director of Infraline.