The difficulty of changing research fields after getting a PhD depends on a number of factors, including:

• The similarity of the two fields. If the two fields are closely related, it will be easier to make the switch. For example, it would be easier to switch from computer science to data science than to switch from computer science to biology.
• The availability of postdoc positions in the new field. If there are a limited number of postdoc positions in the new field, it will be more difficult to find a position.
• The willingness of potential mentors to take on a new student. Some mentors may be reluctant to take on a new student who is not coming from a similar background.
• The student’s own skills and interests. If the student has strong skills and interests in the new field, they will be more likely to be successful in making the switch.

In general, it is more difficult to change research fields after getting a PhD than it is to change fields before getting a PhD. However, it is still possible to make the switch, and there are a number of resources available to help students who are considering a change of field.

Here are some tips for changing research fields after getting a PhD:

• Do your research. Before you make any decisions, it is important to do your research and learn as much as you can about the new field. This includes reading papers, attending conferences, and talking to people who work in the field.
• Network. Networking is essential for making the switch to a new field. Talk to people who work in the field, attend conferences, and join online forums.
• Get experience. If you can, try to get some experience in the new field before you make the switch. This could involve doing a postdoc, taking on a research project, or volunteering.
• Be persistent. Changing research fields can be challenging, but it is important to be persistent. Don’t give up if you don’t get your dream job right away. Keep networking, learning, and applying for positions.