Harishankar Brahma assumed charge as the Chief Election Commissioner (CEC) on Friday and said the first priority was to conduct the Delhi assembly polls in a "free and fair" manner.
He promised to use internet and digital technology to improve election management, especially the voting process.
Brahma succeeds VS Sampath, who completed his tenure on Thursday.
"My first priority and mission objective is to ensure that we conduct the election to the Delhi legislative assembly in an absolutely free and fair manner," he said after taking charge. "Our long-term goal at the Election Commission of India, which I visualise, is to deliver excellence."
"To improve quality, transparency and speed, it will be my personal endeavour to use the latest technology both internet and digital to improve the quality of our election management, especially in voting," he added.
Brahma would be the second from the northeast to hold the post after JM Lyngdoh (2001-04).
The appointment of Brahma, the senior-most member of the Election Commission, was made by President Pranab Mukherjee on Thursday. There is a convention of appointing the senior-most among the three commissioners as the chief election commissioner.
A 1975 Indian Administrative Service officer of Andhra Pradesh cadre, 64-year-old Brahma, who hails from Assam, is a former union power secretary.
He assumed charge as an election commissioner on 25 August 2010.