Guy Moskovich began classical piano at nine and turned to jazz at fourteen, training at Thelma Yellin High School of the Arts. He placed first in the "Al-Derech-HaMelech" piano competition in Ashdod in 2007 and second the following year, and received scholarships from the America-Israel Cultural Foundation that helped send him to New York, where he earned a BFA in Jazz Performance from The New School in 2019, studying and performing alongside Omer Avital, Mike Rodriguez and Ulysses Owens Jr. He has played the Red Sea Jazz Festival and the Bern Jazz Festival, and worked the New York club circuit at Cornelia Street Café and the Jazz Gallery.

His most notable credential is as the pianist in the Avishai Cohen (bass) Trio, a chair he held for close to three years alongside drummer Roni Kaspi. Cohen's own February 2023 newsletter confirmed the lineup directly, noting that "Avishai and his trio with Guy Moskovich (piano) and Roni Kaspi (drums) began 2023 with 2 sold-out shows." Reporting found closer to this profile's publication indicates he was succeeded in the trio by pianist Itay Simhovich starting with a show on March 13, 2026, after nearly three years in the chair — a detail sourced to tour-date coverage rather than a primary Avishai Cohen statement, and offered here as the most current information available rather than as fully confirmed.

He has also worked as a session pianist on other artists' records, including a 2024 Avex-classics session for the Japanese pianist Shutaro Matsui produced by Makoto Ozone, and a 2022 Ubuntu Music release led by fellow Israeli saxophonist Asaf Harris. A December 2025 Tel Aviv club listing, advertising a date with his own band and original material, summarized his run of the previous several years as "collaborating with international Jazz greats (Avishai Cohen, Makoto Ozone, Mike Rodriguez, Omer Avital)." He continues to perform in Israel; he was booked at Amama Jazz in Tel Aviv in December 2025 and again in January 2026.

Moskovich's discography is built almost entirely from high-level sideman work rather than a leader catalogue: a trio chair with one of the most prominent bassist-leaders working today, a produced session for an established Japanese pianist, and dates for working Israeli-diaspora bandleaders. That pattern — training at The New School, then moving directly into first-call sideman work in New York and Tel Aviv rather than issuing an early leader record — places him among the current generation of Israeli jazz pianists whose reputations are built on the bandstand before the studio.