Neuropsychiatric disorders are the leading cause of disability worldwide, accounting for 22.7% of all years lived with disability (YLDs). Despite this global burden, fewer than 25% of affected individuals ever access mental health treatment; in low-income settings, access is much lower, though non-allopathic interventions through traditional healers are common in many venues. Three main barriers to reducing the gap between individuals who need and those who have access to mental health treatment include stigma and lack of awareness, limited material and human resources, and insufficient research capacity. We argue that investment in dissemination and implementation research is critical to face these barriers. Dissemination and implementation research can improve mental health care in low-income settings by facilitating the adaptation of effective treatment interventions to new settings, particularly when adapting specialist-led interventions developed in high-resource countries to settings with few, if any, mental health professionals. In Mozambique, the World Health Organization estimates only 0.04 psychiatrists per 100,000 population, representing 30 times less than the global median, and more than 150 times lower than the median in high income countries. Emerging evidence from other low-income settings suggests that lay providers can be trained to detect mental disorders and deliver basic psychotherapeutic and psychopharmacological interventions when supervised by an expert. Mozambique has both the political commitment and available resources for mental health, but inadequate research capacity and workforce limits the country’s ability to assess local needs, adapt and test interventions, and identify implementation strategies that can be used to effectively bring evidence-based mental health interventions to scale within the public sector. Global training and research partnerships are critical to building capacity, promoting bilateral learning between and among low- and high-income settings, ultimately reducing the mental health treatment gap worldwide. Through new research partnership between Universidade Eduardo Mondlane (Mozambique), Columbia University (USA), Vanderbilt University (USA), and Universidade Federal de São Paulo (Brazil), we are working towards a North-South and South-South collaboration to build research capacity in Mozambique and other Portuguese-speaking African countries.