BROOKLYN, N.Y. -- Prosecutors in the U.S. are asking for a Canadian man to serve the maximum sentence of 15 years after he admitted to helping a terrorist group in Sri Lanka.

Suresh Sriskandarajah, who earned university degrees in Waterloo, Ont., pleaded guilty in July in Brooklyn, N.Y., to conspiring to provide material support to the Tamil Tigers.

The 32-year-old is due to be sentenced on Oct. 28 and written sentencing arguments filed before the hearing show that prosecutors want him to serve the maximum.

Sriskandarajah is arguing for time served.

He was arrested in 2006 and freed on bail three years later before his extradition to the U.S. in 2012.

While in Canada, Sriskandarajah helped research and acquire aviation equipment, submarine and warship design software, night vision equipment and communications technology for the Tamil Tigers.

The Tamil Tigers, notorious for suicide bombings and political assassinations in their fight for an independent homeland in Sri Lanka, were declared a terrorist organization by the U.S. in 1997 and by Canada in 2006.

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  • An internally displaced Rohingya man pushes a rickshaw with children and belongings leaving a camp for displaced Rohingya people in Sittwe, northwestern Rakhine State, Myanmar on Thursday, May 16, 2013. (AP Photo/Gemunu Amarasinghe, File)

  • Bangladeshi commuters move past a red flag warning people of the coming tropical cyclone Mahasen by the coast of the Bay of Bengal in Chittagong, Bangladesh, Thursday, May 16, 2013. (AP Photo/A.M. Ahad)

  • Bangladeshis stand by the Bay of Bengal coast before the tropical cyclone Mahasen made landfall in Chittagong, Bangladesh, Thursday, May 16, 2013. (AP Photo/A.M. Ahad)

  • A red flag flies warning people of the coming tropical cyclone Mahasen by the coast of the Bay of Bengal in Chittagong, Bangladesh, Thursday, May 16, 2013. (AP Photo/A.M. Ahad)

  • Internally displaced Rohingya children lay on a dismantled tent at a camp for displaced Rohingya people in Sittwe, northwestern Rakhine State, Myanmar, Thursday, May 16, 2013. (AP Photo/Gemunu Amarasinghe)

  • An internally displaced Rohingya girl carries an empty water jar and a bucket while leaving a camp for displaced Rohingya people in Sittwe, northwestern Rakhine State, Myanmar, Thursday, May 16, 2013. (AP Photo/Gemunu Amarasinghe)

  • An Indian boatman places his boat at a safer place on the bank of River Brahmaputra, after an alert was sounded for Cyclone Mahasen, in Gauhati, India, Thursday, May 16, 2013. (AP Photo/Anupam Nath)

  • Internally displaced Rohingya gather out side a window, right, to receive rice at a school that they took refuge in Sittwe, northwestern Rakhine State, Myanmar, Thursday, May 16, 2013. (AP Photo/Gemunu Amarasinghe)

  • Bangladeshis shift a fishing boat from the Bay of Bengal coast anticipating Cyclone Mahasen in Chittagong, Bangladesh, Thursday, May 16, 2013. (AP Photo/A.M. Ahad)

  • A Bangladeshi woman holds an infant while resting at a cyclone shelter center before Cyclone Mahasen made landfall in Chittagong, Bangladesh, Thursday, May 16, 2013. (AP Photo/A.M. Ahad)

  • Bangladeshis observe the weather ahead of the coming of tropical cyclone Mahasen, in Chittagong, Bangladesh, Wednesday, May 15, 2013. (AP Photo/A.M. Ahad)

  • Internally displaced Rohingya women who took refuge in a building belonging to a mosque cooks a meal in Sittwe, northwestern Rakhine State, Myanmar, ahead of the arrival of Cyclone Mahasen, Wednesday, May 15, 2013. (AP Photo/Gemunu Amarasinghe)

  • A Bangladeshi child writes on a blackboard at a cyclone shelter center, ahead of Cyclone Mahasen making landfall in Chittagong, Bangladesh, Thursday, May 16, 2013. (AP Photo/A.M. Ahad)

  • Bangladeshi people try to move a fishing boat from the Bay of Bengal coast anticipating Cyclone Mahasen in Chittagong, Bangladesh, Thursday, May 16, 2013. (AP Photo/A.M. Ahad)