Since your toutist visa (B2) and the desired H2 visa are both temporary non-immigrant visas, then applying for the H2 visa should not affect your B1/B2. You must be very careful to not violate any other immigration laws because that/those violation(s) could affect your ability to retain your current B2 or obtain an additional H2. If you are currently in the USA, you will likely want to apply through a change of states application. If you are outside, you would need to apply through the consular pocess. The first step is to have the intending employer petition you through the I-129 application.
Answered on May 23rd, 2022 at 10:03 AM