Mass Effect 2 & Mass Effect 3
Brainchild of asari commando Jona Sederis, Eclipse was incorporated as a "proactive" security company. Influenced by asari and salarian military doctrine, Eclipse specializes in sabotage, assassination, and personal and organizational security. Although Citadel governments regard the corporation with suspicion, it's embraced in the Skyllian Verge and Terminus Systems.
Early on, Sederis sought government contracts to establish market share against the better-established Blue Suns. Her agency scored a galactic PR coup by retaking several space stations captured by the Anhur People's Liberation Army and neutralizing its leaders, a victory Eclipse's marketing department never ceases trumpeting.
Based on Omega Station, Eclipse controls nearly 20% of the asteroid's real estate. Its services range from mech repair to open warfare, although assassination is reserved for meeting wider, longer-term company goals (for instance, pre-emptive strikes against pirates rather than murdering spouses for insurance money). Despite numerous reports, Eclipse denies sabotaging or kidnapping business rivals.