  We present the results of a first search for galaxy candidates at
z$\sim$9--15 on deep seven-bands NIRCam imaging acquired as part of the
GLASS-JWST Early Release Science Program on a flanking field of the Frontier
Fields cluster A2744. Candidates are selected via two different renditions of
the Lyman-break technique, isolating objects at z$\sim$9-11, and z$\sim$9-15,
respectively, supplemented by photometric redshifts obtained with two
independent codes. We find five color-selected candidates at z$>$9, plus one
additional candidate with photometric redshift z$_{phot}\geq$9. In particular,
we identify two bright candidates at $M_{UV}\simeq -21$ that are unambiguously
placed at $z\simeq 10.6$ and $z\simeq 12.2$, respectively. The total number of
galaxies discovered at $z>9$ is in line with the predictions of a non-evolving
LF. The two bright ones at $z>10$ are unexpected given the survey volume,
although cosmic variance and small number statistics limits general
conclusions. This first search demonstrates the unique power of JWST to
discover galaxies at the high redshift frontier. The candidates are ideal
targets for spectroscopic follow-up in Cycle$-2$.
