The new effort, devised in part by New York Mayor Michael Bloomberg, aims to collect supporters and organize a time this spring for them to flood lawmakers’ offices via Twitter, Facebook, by phone and in person.

High-tech leaders including the former heads of AOL and Mozilla are organizing a ‘‘virtual march for immigration reform’’ aimed at pressuring lawmakers to enact sweeping changes to the nation’s immigration laws.

The effort unveiled Monday is particularly focused on making it easier for the U.S. to attract highly educated immigrants and those aiming to work in high-tech fields.

Silicon Valley leaders and others have long complained of the difficulties of bringing high-tech workers to the U.S., and immigration legislation taking shape on Capitol Hill is expected to address the issue.

The new effort, devised in part by New York Mayor Michael Bloomberg, aims to collect supporters and organize a time this spring for them to flood lawmakers’ offices via Twitter, Facebook, by phone and in person