He played in numerous folk, dance and pop orchestras, as well as handling the drums on the "Dimebag Beyond Forever 2009" tour alongside Rainer "Raikku" Tuomikanto.

[2] Mr Lordi accepted the offer and Tonmi became their second drummer with his new stage name "Otus" which is Finnish for "creature" or "thing".

His first gig with the band took place during the "Europe For Breakfast Tour" on 5 November 2010 at Zal Ozhidania, St. Petersburg (Russia).

[4] Lillman had appeared on several albums, acting as a studio musician for bands such as Reflexion, Twilight Ophera, and for instance providing the drum work for the Guitar Heroes -album.

Recently Tonmi has distinguished himself as a studio engineer, mixing and recording such bands as Beherit, Bloodride, Chainhill, D-Creation, Exsecratus, Fierce, Fear of Domination, Heorot, In Silentio Noctis, Laava, Lie in Ruins, MyGRAIN, Rage My Bitch, Raivopäät, Roo, Rujo, Rytmihäiriö, Saattue, Serene Decay, Trauma, Vapaat Kädet and V For Violence.

His style of drumming was rooted in rock, so he valued good groove and a strong rhythmic backbone, combined with innovative fills, over high speeds and blast beats.