Lionel Rouwen Aingimea (born 2 September 1965)[2] is a Nauruan lawyer and politician.

[2] He studied law in Australia and subsequently worked for the Regional Rights Resource Team NGO,[6] and as a public defender in the Marshall Islands.

[7] He later worked as a lecturer in law at the University of the South Pacific.

Following the elections, he joined the new administration of President Baron Waqa as Secretary for Justice.

[6][7] After successfully contesting the Meneng seat in the 2016 elections, he was appointed Assistant Minister for Justice and Border Control in Waqa's government,[6] serving under Minister for Justice David Adeang.