1950s: Catholic Immigration Bureau (CIB) was established under the Catholic Family Services of Toronto. 

1970s: New Canadian Immigration Policy – Increasingly diverse immigrant and refugee arrivals. CIB program and services expanded.

1982: Catholic Immigration Bureau became a department of Catholic Charities and was renamed Department of Immigrant and Refugee Services; began delivering services in Peel Region.

1984: Re-established Catholic Immigration Bureau as an independent agency.

1985: Began managing the Refugee Sponsorship Program for the Archdiocese. Increasingly diverse newcomers arriving in Canada.

1995: Name change from Catholic Immigration Bureau to Catholic Crosscultural Services.

2006: Began period of significant expansion of programs, services, and locations.

2009: The agency delivered services through nine locations (including two kiosks) in Brampton, Mississauga and Scarborough, in addition to 60+ community locations in the Greater Toronto Area. The organization had increased almost threefold since 2006.

The Toronto East Quadrant Local Immigration Partnership (TEQ LIP) was developed; CCS took on the role of lead agency of the program.

2011:  Due to Citizenship and Immigration Canada (CIC) funding being reduced, both mall kiosks closed.  Continued to provide services through seven office locations and over 100 community locations.

2013:  Newcomer Mental Health program launched.

2014: The 18-month Culinary Training for Youth Project and one-year Financial Literacy Project launched.

2015: CCS had experienced six years of funding cuts from CIC, resulting in program downsizing, closures and staff lay-offs.  Many austerity measures were put in place to reduce overhead and fixed costs.

2016: Demand for Refugee Sponsorship Training Program (RSTP) services skyrocketed in response to the growing interest in Private Sponsorship of Syrian refugees.

2017: RSTP trainers are now located in seven major cities: Toronto, Vancouver, Calgary, Edmonton, Saskatoon, Winnipeg and Halifax.

CCS opened a third language (LINC) site in Peel Region and also started the Crisis support counselling and Financial Literacy services in Toronto.

2018: RSTP expanded its services further out in Ontario and placed trainers in Peel and Ottawa.