WASHINGTON — Three rideshare launch service providers are joining forces to support launches to geostationary orbit. Innovative Solutions in Space (ISISPACE), Maverick Space Systems and SEOPS announced Dec. 19 a partnership focused on launch opportunities to geostationary transfer orbit (GTO). The companies will remain independent but cooperate on GTO launch options for payloads. “We’ve had the privilege of working alongside each other for years on many different launch campaigns and have discovered we all share a mission-first culture and a ‘roll-up-your-sleeves’ work ethic,” Chad Brinkley, chief executive of SEOPS, said…