President Obama has chosen the woman who is spearheading current negotiations toward normalized relations with Cuba to be the next U.S. ambassador to Mexico.

The selection of career diplomat Roberta Jacobson, a Mexico expert, was made official Tuesday afternoon. Jacobson has been the assistant secretary for Western Hemisphere Affairs for three years, and has recently led the formal talks in Havana to normalize relations.

The decision to appoint her now suggests the heaviest lifting is over, though with the slow crawl of nominations in the Senate, she’ll still have plenty of time to work on the deal before a confirmation vote.

Obama originally selected Maria Echaveste to serve in Mexico City, but she withdrew in January.

A long-time Latin America specialist, Jacobson would be the first woman to hold the top envoy post in Mexico. Among her other State jobs, she was previously deputy chief of mission at the U.S. Embassy in Peru.