Title: Grigoryev
Content: Dima Grigoriev (born 1954), Russian mathematician 
Title: Dima Grigoriev
Content:  Dima Grigoriev (Dmitry Grigoryev) (born 10 May 1954) is a mathematician. His research interests include algebraic geometry, symbolic computation and computational complexity theory in computer algebra, with over 130 published articles. Dima Grigoriev was born in Leningrad, Russia and graduated from the Leningrad State University, Dept. of Mathematics and Mechanics, in 1976 (Honours Diploma). During 1976–1992 he was with LOMI, Leningrad Department of the Steklov Mathematical Institute of the USSR Academy of Sciences. In 1979 he earned PhD (Candidate of Sciences) in Physics and Mathematics with thesis "Multiplicative Complexity of a Family of Bilinear Forms" (from LOMI, under the direction of Anatol Slissenko). In 1985 he earned Doctor of Science (higher doctorate) with thesis "Computational Complexity in Polynomial Algebra". Since 1988 till 1992 he was the head of Laboratory 
Title: Dmitry Grigoryev (businessman)
Content:  Dmitry Grigoriev was born in Almaty, Kazakhstan, to a Russian family. At 17 he enrolled in the Kazakh State Academy of Management and graduated with a Diploma of Excellence, specialized in monetary and financial relations. In 1996 Grigoriyev attended SDA Bocconi School of Management. He graduated in 1998 with a Master of Business Administration. Additionally he followed specialized courses on mergers and acquisitions held internationally. He began his career as the Executive Director of the Construction company “EAST Engineering” and continued at financial and banking institutions in Kazakhstan. In 1998 his career evolved internationally, Grigoriyev moved to London, UK in order to undertake his new position as Manager-coordinator at Аlcam International. Further, he held the position of Manager of Business Development at AONET spa in Milan, Italy. In 2003 he returned to Kazakhstan to continue his career as the Deputy Manager of the Department for Import and Substitution in Major Oil and Gas Projects at KazMunaiGas. Further, Grigoriyev undertook the position of the Deputy Manager of Export Department at Trade House KazMunaiGas.
Title: Dmitry Grigoryev (businessman)
Content:  Dmitriy Mihailovich Grigoriyev (Russian: Дмитрий Михайлович Григорьев; born July 29, 1975) is a Russian businessman. Grigoriyev is the former Chief Financial Officer of The Rompetrol Group (currently KazMunayGas International NV), a Romanian oil company, that operates in many countries around the world.
Title: Dmitry Grigorieff
Content:  Archpriest Dmitry Grigorieff (May 14, 1919 – December 8, 2007) was the dean emeritus of the Saint Nicholas Russian Orthodox Cathedral of Washington D.C.. Grigorieff was also an academic scholar and was a retired Professor of Russian language and literature at Georgetown University.
Title: Dmitry Grigorieff
Content:  Grigorieff, who was a Fyodor Dostoevsky scholar, taught Russian language and literature at Georgetown University from 1959 until 1989. Additionally, he also taught at the Army Language School in Monterey, California, as a Russian language professor and at Columbia University in Manhattan.
Title: Dima Grigoriev
Content:  algorithmic methods Leningrad Department of the Steklov Mathematical Institute. During 1992–1998 Grigoriev hold the position of full professor at Penn State University. Since 1998 he hold the position of Research Director at CNRS, University of Rennes 1, and since 2008 – Research Director at CNRS, Laboratory Paul Painleve University Lille 1 in France. He is member of editorial boards of the Journal Computational Complexity, Journal of Applicable Algebra in Engineering, Communications and Computations and Groups, Complexity, Cryptology. He is recipient of the Prize of Leningrad Mathematical Society (1984), Max Planck Research Award of the Max Planck Society, Germany (1994), and Humboldt Prize of Humboldt Foundation, Germany (2002), Invited Speaker of International Congress of Mathematicians, Berkeley, California, 1986. He has Erdős number 2 due to his collaborations with Andrew Odlyzko.
Title: Dmitry Grigorenko
Content:  Dmitry Yuryevich Grigorenko (born 14 July 1978) is a Russian politician, who was elected as deputy Prime Minister of the Russian Federation and Chief of the Government Staff assumed office in January 2020. He was born Nizhnevartovsk, Tyumen Region. He graduated from the Kuban State University and Institute of economy at the Kuban institute of the international entrepreneurship and management in the specialty specialized in finance.
Title: Kirillov (town)
Content:  Russian mathematician Dmitry Grave was born in Kirillov in 1863, although he spent his career elsewhere.
Title: Dmitry Grave
Content:  Dmitry Aleksandrovich Grave (Дми́трий Алекса́ндрович Гра́ве; September 6, 1863 – December 19, 1939) was a Russian and Soviet mathematician. Naum Akhiezer, Nikolai Chebotaryov, Mikhail Kravchuk, and Boris Delaunay were among his students.

Question: What is Dima Grigoriev's occupation?
Answer: mathematician.