Boston-based MFS Investment Management announced it will be elevating two of its portfolio managers to share the responsibilities of co-chief investment officers for its fixed-income department.

Pilar Gomez-Bravo and Alexander Mackey were named co-CIO and will serve alongside current CIO Bill Adams, the company announced yesterday The promotion will take effect on March 1. The structure mirrors a similar one the firm incorporated in their equity division about four years ago, a firm spokesman said.

“MFS’ fixed income team has grown around the world in the past decade and this enhanced structure will ensure continued strong collaboration and communication across our global research platform,” a spokesman said in an email.

The three will divide their responsibilities equally, the company said.

“They will focus on empowering the investors within the [fixed-income] department, consistent with long-established processes and our highly collaborative, team-based approach, making sure the right people are in the right roles to serve the investment needs of our clients over the long term,” the firm said in the email.

Mackey has been with MFS since 1998 and joined the fixed-income department in 2001, serving as both portfolio manager and analyst. His experience at the firm has included helping guide the process for MFS’s U.S. high‐grade corporate credit research as well as its efforts in portfolio management.

Gomez-Bravo has been with MFS since 2013. She has more than 25 years of investing experience, according to the firm. She played a significant role in establishing the firm’s fixed-income department in London. Currently, she serves as a portfolio manager for several fixed income strategies and works with multiple investment committees and working groups beyond just the fixed income class.

Fixed income has been a growing investment class recently and MFS has seen that success first hand as its assets under management in this space increased by 23% since 2017, according to the firm. With that growth continuing and more than $94 billion in fixed income assets as of June 30, MFS decided one CIO was insufficient to continue to lead the division.