A good DevOps trainer should possess a number of qualities that are necessary for delivering effective training and consulting services:

1. Strong technical knowledge and experience: A DevOps trainer should have a deep understanding of the principles and practices of DevOps, as well as experience in implementing these practices in real-world scenarios.
2. Industry experience: A DevOps trainer should have experience working in a variety of industries, and be familiar with the unique challenges and requirements of different organizations.
3. Strong communication and teaching skills: A DevOps trainer should be able to explain complex technical concepts in a clear and concise manner, and be able to adapt their teaching style to suit the needs of different audiences.
4. Flexibility: A DevOps trainer should be able to adapt to the specific needs of different organizations and be able to provide customized training and consulting services.
5. Strong problem-solving skills: A DevOps trainer should be able to help organizations identify and resolve issues related to the implementation of DevOps practices.
6. Continual learning: A good DevOps trainer should be continuously learning and staying up to date with the latest tools, technologies and best practices in the field of DevOps.
7. Mentorship skills: A good DevOps trainer should be able to guide, mentor and coach individuals and teams on their DevOps journey.
8. Strong understanding of Agile principles and methodologies: A good DevOps trainer should be able to explain the relationship between Agile and DevOps and how they complement each other.

Overall, a good DevOps trainer should have a strong combination of technical knowledge, industry experience, and teaching and consulting skills, as well as the ability to adapt to the unique needs of different organizations.