The city of Des Moines has selected Nationwide as its exclusive retirement plan provider. Nationwide will provide consolidated record keeping, marketing and educational services for the plan’s 1,800 participants and $165 million in assets, the company said in a release. Nationwide is currently one of nine companies that provide those services; moving participants to a single record keeper will lower both administrative and investment costs. Nationwide said those savings will all be passed on to participants and help increase account balances for retirement. Nationwide is the retirement plan provider for nearly 1.6 million government workers, with more than $70 billion in assets managed. The Des Moines contract is for seven years, and the goal is to transition the plan early next year.