Arlington and Marysville are joining to submit the Arlington-Marysville Manufacturing Industrial Center to Amazon as one location for the company’s second headquarters.

In September, Amazon announced that it would build a second, completely equal headquarters somewhere in North America. The headquarters is expected to bring tens of thousands of well-paying tech jobs to wherever it is sited.

Arlington and Marysville’s proposal is one of several sites that have been submitted in a joint proposal from Snohomish and King counties, including one from the nearby Tulalip Tribes. Proposals are due Thursday. Amazon is expected to award the headquarters sometime in spring 2018.

The goal of the MIC is long-term economic development to better support local companies and help employers start and grow businesses. Regional leaders are working to market it domestically and internationally, and to recruit large and small businesses.