 Lionel Selwood Jr. is out as the president and CEO at startup commercial truck battery pack maker Romeo Power Inc., replaced by 30-year auto and energy industries veteran Susan Brennan. Selwood, who became CEO about a year ago, led the company through its public debut sponsored by special purpose acquisition company RMG Acquisition Corp. Romeo received 384 million before expenses with an enterprise value of 900 million when the business combination closed last December. 