The nation’s leader in biodiesel making and making biodiesel plants has a new leader of its own.

Biodiesel Magazine reports that Renewable Energy Group’s Daniel J. Oh, Chief Operating Officer, is taking over as President of the Iowa-based company:

Mr. Oh takes the reins from Nile Ramsbottom, who has served as Renewable Energy Group’s president since the company’s incorporation in 2006. Mr. Ramsbottom’s leadership helped launch REG as a premier producer and marketer of high quality biodiesel. In the nine years Mr. Ramsbottom has served at REG and its predecessor West Central Cooperative, the company’s biodiesel business has grown from a 1 million gallon-per-year batch plant to a network with the more than 300 million gallons of annual production capacity. Mr. Ramsbottom has agreed to forgo full retirement to help strengthen REG’s global presence. The new global sales position will be based in St. Louis.

Of the transition Renewable Energy Group Chairman and CEO Jeffrey Stroburg said: “Our board of directors appreciates Mr. Ramsbottom’s willingness to continue in this new and critical role as he shifts from his position as REG’s president and prepares for a personal and professional transition after his 65th birthday in May. In this new position, Mr. Ramsbottom will continue pursuing relationships and business with national and international biodiesel customers and large feedstock producers.”

Jeffrey Stroburg stays on as REG’s Chairman of the Board and Chief Executive Officer, with Jeff Pattison remaining as Chief Financial Officer.