Expion360 Inc., a lithium-ion battery power storage supplier, has appointed Joseph Hammer as CEO and chairman of the board of directors, effective Oct. 16.
Hammer succeeds CEO Brian Schaffner and President and Board Chairman Paul Shoun. Schaffner and Shoun stepped down from their respective roles at the company. Schaffner will continue to serve on the board of directors.
Schaffner said, “Joseph brings an incredible track record of success, with the experience and industry relationships necessary to lead Expion360 to its next stage as an industry leader in premium lithium iron phosphate batteries and accessories.”
Shoun, a co-founder of the company, was named board chairman in August 2023.
Schaffner was named CEO in January 2023, succeeding company co-founder John Yozamp.
Expion360 transformed into a public company in June 2022. With Shoun’s departure, the battery supplier’s founders have both departed the company. Shoun and Yozamp launched Expion360 in 2016.
Hammer brings over 20 years of experience as a veteran financial executive and board director. Most recently, he had served as the chief investing officer at LHX Corp. since February 2025.
“I am pleased to announce such a well-qualified leader,” Schaffner said of Hammer, “who can continue our momentum by growing the business into a profitable industry leader in lithium-ion batteries solutions for recreational vehicles, marine applications, light EV and home energy storage solutions.”
Hammer has served as chairman of the board of Nasdaq-listed Trailblazer Merger Corp. I since 2023. He founded The JDH Foundation, a 501(c)(3) charitable organization that supports local and international charitable causes in 2020.
Hammer said he looks forward to working with the company’s executive team.
“We believe that now is the right time to make a change in leadership as we shepherd the company into the next phase of expanding distribution and advancing our lithium-ion battery technology,” Hammer said. “I am thrilled to have the opportunity to lead Expion360 and believe the company’s current balance sheet positioning, from a combination of cash, receivables and strong inventory levels, positions us to execute on our key growth initiatives, further developing advanced energy solutions and introducing new technologies.”
