It is hereby ordered that the determination is unanimously confirmed without costs and the petition is dismissed.
Memorandum: Petitioner commenced this CPLR article 78 proceeding seeking to annul the determination of respondent New York State Division of Human Rights that respondent New York State Department of Correctional Services/Collins Correctional Facility (DOCS), her employer, did not engage in unlawful discrimination and retaliation with respect to her. We note at the outset that, contrary to petitioner's contention, the doctrine of collateral estoppel does not apply to preclude DOCS from defending its actions as a result of a prior arbitration award. First, there was no identity of issue necessary for application of that doctrine because the arbitration proceeding concerned whether the allegedly unlawful actions by DOCS violated the collective bargaining agreement between petitioner's union and the State of New York ( see generally Parker v Blauvelt Volunteer Fire Co., 93 NY2d 343, 349). Second, the arbitrator determined that certain adverse actions were not legitimate because petitioner had not been afforded her right to procedural due process, and he specifically declined to address the merits of the reasons advanced by DOCS for those actions. "In properly seeking to deny a litigant two `days in court,' courts must be careful not to deprive him [or her] of one" ( Matter of Reilly v Reid, 45 NY2d 24, 28). Inasmuch as the arbitrator did not address the legitimacy of the reasons for the actions of DOCS, collateral estoppel does not apply ( see e.g. SF Holdings Group, Inc. v Kramer Levin Naftalis Frankel LLP, 56 AD3d 281, 282; Tak Shing David Tong v Hang Seng Bank, 210 AD2d 99, 99-100; Matter of Valentino v American Airlines, 131 AD2d 6, 9; Lewis v Bendet, 71 AD2d 913, 914). Contrary to petitioner's remaining contentions, we conclude that the determination is supported by substantial evidence and thus must be confirmed ( see generally Matter of State Div. of Human Rights [Granelle], 70 NY2d 100, 106).