His journey into the domains of various religious philosophies and interest in theology from a psychological perspective reflects a nuanced view of spirituality and faith.

Arestovych has delved into a wide range of religious literature, analyzing prominent texts in Sufism, Hinduism, Buddhism, and Christianity.

His studies at Kyiv Superior Institute of Religious Sciences furthered his interest in theology and led to him developing a progressive set of ethics and spiritual values.

[20][21] In June 2009, he was appointed deputy head of the Prymorskyi District Administration of the Odesa City Council,[22] but he was dismissed after three months at his own request.

[23] On 28 October 2020, Arestovych was appointed by Leonid Kravchuk as Adviser on Information Policy[24][25][26] and official speaker of the Ukrainian delegation to the Trilateral Contact Group on Ukraine at the Minsk talks on resolving the war in Donbas.

[25][27][28] On 1 December 2020, the Head of the Office of the President of Ukraine Andriy Yermak appointed Oleksiy Arestovych his unpaid[29] adviser on strategic communications in the field of national security and defense.

Despite his resignation, Arestovych remained active in international forums, discussing Ukraine's geopolitical situation and emphasizing the importance of thinking about regime change in Russia rather than hoping for its disintegration.

[45][1][43] In November 2023 Arestovych argued that next Ukrainian elections should be conducted in March 2024 despite the ongoing war in order to legitimize the leadership of the country.

[49] On 27 July, Arestovych’s pages on social networks were included in the Belarusian list of extremist materials by decision of the Leninsky District Court of Mogilev.

[52] Due to a complaint from People's Deputy of Ukraine Inna Sovsun, an investigation has been opened into Arestovych for comments that allegedly promoted violence against women in a video published on his YouTube channel on 25 September 2023.

[47][53] On November 16, a second investigation was opened into Arestovych for "knowingly filing a false report of a crime"; Arestovych had previously filed a complaint with Ukraine's State Bureau of Investigation about "incitement to national hatred and enmity on the basis of language" by MP Nataliya Pipa due to her criticism of a teenager singing Russian-language songs in Lviv.

He founded Apeiron School for Leadership Development in 2013, enrolling students from more than 30 countries with a diverse range of backgrounds: corporate executives, IT professionals, healthcare and social workers, journalists, educators, as well as political and civic leaders.