Former LHC players Broc Little and Jonas Junland replace Mårtensson.
"Now it is important that new energy comes in," Mårtensson tells the club's website.
The club says it is developing a clear requirements specification focused on long-term solutions for the club.
"The fact that we have been able to appoint Little and Junland on an interim basis gives us the opportunity to work long-term and in a structured way on recruiting the sporting management for the coming seasons," says CEO and club director Carl-Johan Stålhammar.
Mårtensson has played a total of six seasons as a player for the club.
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