This article examines how personality traits of members of the Lithuanian Riflemen’s Union (LRU), based on the Big Five personality model, can influence training effectiveness and the learning process. Compared to the general population, members of the LRU are characterised by particularly great conscientiousness and extroversion, greater agreeableness and openness to experience, and lower neuroticism. Additionally, their personality traits are more homogeneous, suggesting a more uniform learning style across the organisation. Considering these characteristics, training programmes can be optimised to enhance learning outcomes. The results support the continuation of structured and disciplined training environments, while emphasising team-based learning, decision-making under stress, and innovative training methods tailored to LRU members’ cognitive and behavioural tendencies. These insights contribute to a broader discussion of the interplay between personality and learning, and provide practical recommendations for improving military and paramilitary training programmes.