Eiichi Tachi joined The Mitsubishi Bank, Ltd., (current MUFG Bank, Ltd.) in 1992. Since joining the bank, he has been consistently engaged in corporate-related business, including corporate sales at domestic sales offices and examination of large corporations in the Corporate Credit Department. In 2019, he joined PAS Communications Inc. and was appointed as General Manager of the Business Administration Division. He joined Frontier Management Inc. in 2021.

From 2008 to 2016, he worked in the Corporate Credit Department at MUFG Bank, Ltd.. He was in charge of the general trading company, heavy machinery shipbuilding, oil wholesaler, machinery, and engineering sectors, where he reviewed and accumulated quality assets for large global companies in various parts of the world.

At MUFG Bank, Ltd., he was in charge of syndicated loans for large-scale facilities, succession capital planning, and M&A marketing.

He was twice posted to London, UK from 1989 to 1996 and from 2003 to 2004 at Sumitomo Mitsui Banking Corporation. He was engaged in financial business with non-Japanese companies including airlines in Europe, the Middle East, and Asia, as well as Japanese companies operating in Europe.

At Frontier Management Inc., he was involved in consulting, M&A deal marketing, and client relationship management in the Corporate Sales Department.