He received a six-month contract to coach Heartland F.C. in July 2010. On 4 November 2010, he was named as the national team coach to succeed Swedish Lars Lagerbäck. He was fired on 28 October 2011 for failing to take the Nigeria team to the 2012 African Nations Cup in Gabon & Equatorial Guinea. Siasia was one of the five foreign managers auctioned in February 2012 for the new Bengal Premier League Soccer. His former national teammate, Jay-Jay Okocha, was bought by the same club from the five icon players up for auction. On 26 February 2016, he was named by the Nigeria Football Federation (NFF) as the Chief Coach of the Nigeria national football team, the Super Eagles, to be assisted by Salisu Yusuf, Emmanuel Amunike and Alloysius Agu after the resignation of Sunday Oliseh from the position. He returned to the U-23 post in 2015 and led Nigeria to the Rio Olympics. In February 2017 he was one of a number of managers on the shortlist for the vacant Rwanda national team manager role. In April 2018 he was one of 77 applicants for the vacant Cameroon national team job. In August 2019 he was handed a lifetime ban by FIFA related to match fixing. He said he would appeal but was in no rush to do so.