<p>This study explores the critical intersection of professional ethics and environmental science education, highlighting the urgent need for coherent, integrated ethical frameworks in this inherently interdisciplinary field. Environmental scientists increasingly face complex ethical dilemmas involving trade-offs between economic development, ecological preservation, and social justice. Yet, ethics remains inconsistently embedded in environmental science curricula. Through thematic analysis of 28 Australian environmental professional codes and comparison with leading international frameworks, this research identifies seven core ethical principles: integrity, scientific objectivity, environmental stewardship, public accountability, justice, transparency, and ethical courage. The analysis reveals significant curricular gaps, particularly in areas such as Indigenous co-governance, sustainability commitments, and climate advocacy, where Australian standards fall short of global benchmarks. Drawing on educational theory and transdisciplinary ethics, the paper presents practical, evidence-informed strategies for embedding ethics education across four domains: curriculum development, pedagogical design, faculty support, and professional partnerships. Recommendations include integrating ethics into learning outcomes, adopting experiential and cross-disciplinary teaching methods, forming student-led ethics committees, and fostering collaboration between universities and professional bodies. By equipping graduates with the ethical competencies needed for professional practice, this approach strengthens public trust in environmental science and supports more just, responsible, and sustainable outcomes for ecosystems and communities.</p>