Mushtaq Ahmed, the former Pakistan legspinner, will return to Hove as Sussex's coach for three months this year.
Mushtaq was announced last year as the ECB's spin bowling coach, and will split his time between his England duties and those with Sussex. His deal at Hove was verbally agreed in October, but, due to new work permit regulations in the United Kingdom, the announcement was only made today.
"It's a great honour to come back to my family. It will be nice to see all my friends again and hopefully I will be able to take my performances from the field into the dressing room," Mushtaq said. "When you have a passion for something, you allow yourself to give your best and I have the passion and desire for coaching.
"It is also a great honour to be working with the ECB and I am looking forward to passing on my experience to the spinners of England, as well as the whole Sussex squad."
Mark Robinson, Sussex's manager, said: "The confirmation of Mushtaq's signing for the summer comes as great news to the club, especially after the intricacies of the new work permit regulations in the UK.
"We worked closely with Mushtaq and the ECB in October to make sure the deal went ahead. It is great to have a man of Mushy's experience and stature to be working with the squad in what promises to be another exciting year of cricket at Hove."
Mushtaq retired from cricket in 2008, ending his first-class career with over 1400 wickets.