This paper will deliberate upon the relevance of guidance counselling as a "whole school" responsibility in the context of recent policy and practice changes in the Irish post primary sector since the Government of Ireland Budget 2012. Pertinent issues including the complexities of delivering a whole school approach to guidance counselling during a period of resource rationalisation will be addressed through the findings from recent case study research [Hearne, L., Geary, T., & Martin, N. (2016). "A single case study of a whole school approach to guidance counselling in an Irish post-primary school; Case report." Retrieved from University of Limerick website: http://www.ul.ie/soedu/sites/default/files/Hearne20et20al20WSA20to20GC20Case20Report20UL%202016_0.pdf]. A single explanatory case study methodology investigated the complex phenomenon and interventions of whole school guidance counselling in a mixed gender school in the context of increasing demands for evidence-based data and methodological sophistication in lifelong guidance [European Lifelong Guidance Policy Network. (2015a). "The evidence base on lifelong guidance; A guide to key findings for effective policy and practice, extended summary." Jyväskylä: Kariteam; Hearne, L. (2009). "Towards an understanding of the measurement of individual progression in adult guidance" (Unpublished doctoral dissertation). Waterford Institute of Technology, Waterford; Stake, R. E. (2004). "Standards-based & responsive evaluation." Thousand Oaks, CA: Sage; Yin, R. K. (2009). "Case study research: Design and methods" (4th ed.). Thousand Oaks, CA: Sage; Yin, R. K. (2014). "Case study research" (5th ed.). Thousand Oaks, CA: Sage].