There are several ways to get the best PhD dissertation help in the USA:

Consult with your academic advisor or professors: Your academic advisor or professors can guide you in selecting a topic, developing a research proposal, and providing feedback on your work. They may also be able to recommend a good dissertation writing service or editor.

Join online forums and groups: You can join online forums and groups related to your field of study to get advice, feedback, and recommendations on dissertation writing services and editors.

Research dissertation writing services: Look for dissertation writing services that have good reviews and ratings, offer plagiarism-free work, and have experienced writers in your field of study.

Check credentials: Ensure that the dissertation writing service or editor you choose has qualified professionals with a proven track record of successful dissertations.

Ask for samples: Request for samples of previous work done by the writing service or editor to evaluate the quality of their work and ensure that they can meet your expectations.

Consider pricing: While it's essential to get the best help, it's also essential to ensure that the price is reasonable and within your budget.

By following these tips, you can find the best PhD dissertation help in the USA and complete your dissertation successfully.