Bartossik has been a member of the National Union of Artists of Ukraine since 1993, and a member of the United Scenic Artists of America since 1998.
He worked at the Kiev Monumental and Decorative Art Association from 1976–1995, where he worked in collaboration with artist Ernest Kotkov, creating three-dimensional compositions, including:
"Awakening" and "Let The Sun Always Shine" – sculptures made of iron and concrete covered with mosaics (1981, Varash, former Kuznetsovsk, Rivne region, Ukraine) Project architect – F. Y. Khudyakov.

"Meteorite" – sculpture up to 15 m of iron and concrete covered with a mosaic of glazes, marble and specially made "module" of stainless steel (1983, Dnipropetrovsk, Ukraine), architects of the project: Yuriy Khudyakov, Victor Sudorgin.

"Lybidska" Metro Station – composition of light line with brass elements extending the full length of the station and ends with the central panel in the end station made of brass, marble, brass stars and lights.
Also, lighting design by official platform and the door track on the wall made of brass.
The station was opened on December 30, 1984, Kyiv, Ukraine.
Architects: Valentyn Ezhov, Anatoliy Krushynkyi, Tamara Tselikovska with Oleksiy Panchenko, artists Ernest Kotkov, Nikolai Bartossik.

"By The Sources" – sculpture mede of copper and concrete (1986, Kyiv, block – Vyhurivschyna–Troyeshchyna, Ukraine) architects of the project: Mykola Kyslyi,  Grygoriy Gurenkov.

(Decorative Soviet era decoration pictured below is due to be removed due to 2015 decommunization laws.)
Bartossik has been a member of the National Union of Artists of Ukraine since 1993, and a member of the United Scenic Artists of America since 1998. He worked at the Kiev Monumental and Decorative Art Association from 1976–1995, where he worked in collaboration with artist Ernest Kotkov, creating three-dimensional compositions, including:
"Awakening" and "Let The Sun Always Shine" – sculptures made of iron and concrete covered with mosaics (1981, Varash, former Kuznetsovsk, Rivne region, Ukraine) Project architect – F. Y. Khudyakov.
"Meteorite" – sculpture up to 15 m of iron and concrete covered with a mosaic of glazes, marble and specially made "module" of stainless steel (1983, Dnipropetrovsk, Ukraine), architects of the project: Yuriy Khudyakov, Victor Sudorgin.
"Lybidska" Metro Station – composition of light line with brass elements extending the full length of the station and ends with the central panel in the end station made of brass, marble, brass stars and lights. Also, lighting design by official platform and the door track on the wall made of brass. The station was opened on December 30, 1984, Kyiv, Ukraine. Architects: Valentyn Ezhov, Anatoliy Krushynkyi, Tamara Tselikovska with Oleksiy Panchenko, artists Ernest Kotkov, Nikolai Bartossik.
"By The Sources" – sculpture mede of copper and concrete (1986, Kyiv, block – Vyhurivschyna–Troyeshchyna, Ukraine) architects of the project: Mykola Kyslyi,  Grygoriy Gurenkov.
(Decorative Soviet era decoration pictured below is due to be removed due to 2015 decommunization laws.)
Nikolai Bartossik