Technical expertise is crucial for a business analyst as it enables effective data analysis and understanding of complex systems. Sales managers can develop technical skills by taking online courses in data analysis, learning tools like Excel or SQL, and participating in workshops. Networking with technical experts within the organization, seeking mentorship, and engaging in hands-on projects can also enhance technical proficiency. Continuous self-learning and staying updated on relevant technologies are essential for a successful transition. If you are interested in getting into this field, then check out this video about Saravanan Vasudevan. How he got a career switch from Sales Manager to Business Analyst just after completing Intellipaat's Advanced Certification in Data Science and AI.