The issue of integration of immigrants into labor market has currently become essential. Serial arrangements have been put in place in Canada to promote the articulation of immigration, labor market, social security, education and social cohesion. This article mainly explores the factors to determine immigrant's employment in Montreal. Besides individual characteristics, particular attention is paid to the impact of macroeconomic environment and redistribution policies on the employment probability of immigrants. Results indicate that immigrants actually belong to a heterogeneous group in terms of individual characteristics and employability. Some immigrants remain on the margin of labor market, which is particularly true for female, older, and less qualified migrants. Unemployment insurance benefits are found to have negative influence on the employment probability of immigrants. In addition, the impact of local unemployment rate is significantly negative, especially for low skilled immigrants.