Just because you have skills and knowledge on high demanding niche does not mean you will become successful in your career. Achieving rapid career growth and becoming successful requires skills/knowledge, dedication, and relationships. Build knowledge and skill, dedicate yourself to your work, and network within your industry. You always should meet deadlines and be open to additional tasks. You not only need job specific skills but also other skills such as communication, language and writing skill, presentation skills, etc. Building relationship will expose you to better opportunities.