After graduating from the Moscow State Institute of International Relations in 1968, Losyukov entered the service of the Soviet Ministry of Foreign Affairs, working in various positions in the central office and in diplomatic missions abroad, including in Afghanistan, the United States and the Philippines.
From 1992 to 1994, Losyukov was Ambassador of Russia to New Zealand, with concurrent accreditation to Samoa and Tonga. From 1994 to 1997, Losyukov was Ambassador of Russia to Australia, with concurrent accreditation to Fiji, Nauru and Vanuatu.
In July 2001, as Deputy Minister of Foreign Affairs, he led the signature of the 2001 Sino-Russian Treaty of Friendship. On 19 September 2001, he met with PCR ambassador Zhang Deguang to discuss the aftermath of the September 11 attacks. In 2003, as soon as North Korea gave up the Treaty on the Non-Proliferation of Nuclear Weapons which led to the start of the North Korea nuclear crisis, Alexander Losyukov traveled to North Korea as soon as January 2003 with the mission to find a negociation process between the communist country and the United States, considering Russia and the US as allies in the war against terrorism. He declared the talks with his North-Korean counterparts, and Kim Jong-il, as successful.
- Лосюков Александр Прохорович (in Russian). Biografija.ru. Retrieved 2009-08-02.
- James Bellacqua (12 September 2010). The Future of China-Russia Relations. University Press of Kentucky. ISBN 9780813129396.
- "Russian Deputy Minister of Foreign Affairs Alexander Losyukov meets with PRC ambassador to Russia Zhang Deguang". Mid.ru. 19 September 2001. Retrieved 18 October 2018.
- Glen Segell (2005). Axis of Evil and Rogue States: The Bush Administration, 2000-2004. Glen Segell Publishers. ISBN 9781901414271.
- Указом Президента Российской Федерации от 2 марта 2004 г. назначен Чрезвычайным и Полномочным Послом Российский Федерации в Японии. (in Russian). Russian Ministry of Foreign Affairs. 2 March 2004. Archived from the original on 14 June 2011. Retrieved 2009-08-02.
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