I fly to Florida on Tuesday for a fortnights holiday and have been asked by my employer to return 6 days after I return to supervise installation of video walls supplied by a UK company sold to an American company and fitted Into shopping malls across America. This will be for 3-4 weeks depending on progress.
American labor will be used to install but for warranty we have to supervise correct installation as these are big units. We.do this all over the world my last trip was to Qatar for them and was exactly the same deal we supervised installation.
I am British myself and already have an ESTA for the holiday will this suffice for the work and would I need to notify them I am returning?