Garth has carried out public health research since 2000, working in Malawi, Ghana and Scotland. Working with people living in the poorest parts of these countries gave him a passion for sustainability, global and social justice. He manages a team of public health evidence specialists working on a broad range of topics ranging from domestic abuse to housing improvement and regeneration. He carries out and commissions research across Scotland. He chairs the Outcomes Framework group and initiated and manages the PhD internship programme in NHS Health Scotland. He is a member of the Research and Evaluation subgroup of the Ministerial Tobacco Control Group and of the Scottish Alcohol Research Network. He works closely with the Scottish Government and the Scottish Collaboration for Public Health Research Policy. He is also a reviewer for the journals Evaluation and The Journal of Public Health. He is a committed trustee for Take One Action and brings cutting edge, critical thinking and academic excellence to the work which the organisation does.