First entering the game during the summer of 1998, Robert Siwiak has held a variety of player and staff positions within A Call to Duty. His first chat character was posted aboard the 1st Fleet's I.K.S. QIb as Chief Engineer, where he stayed for 11 months and rose to the rank of Commander and ship's Second Officer.

1999 would bring about a large influx of new cadets to ACTD, and a number of new ships were launched during the second half of the year. Among them was the Ambassador-class U.S.S. Andromeda, commanded by Captain Siwiak and managed by former QIb CO Chris Williams. After holding the center seat for seven months, Robert took the reigns for a short while as the Andromeda's SM before taking a leave of absence from the game due to real life conflicts.

Robert would return in the Fall of 2000 aboard the U.S.S. Don Johnson before going on to the U.S.S. Claymore and eventually the U.S.S. Seleya shortly before the ship's destruction. One of his current characters, Michelle Masters, continues to serve aboard the newly-launched Seleya, ACTD's first and only Sovereign-class starship.

In the Play by Email Division, Robert initially played Ensign Michael Siwiak aboard the U.S.S. Minotaur before being offered command of the U.S.S. Pavonis in 2002. With the Pavonis entering her second full year, he was also promoted to Fleet Manager of the division's new 10th Fleet.

In addition to his character and staff roles, Robert is also a charter member of ACTD's Advanced Starship Design Bureau acting as webmaster and writer of various starship technical specifications used in the game.

Outside ACTD, he is a college student at the University of Texas in Austin studying for a degree in Radio-Television-Film, with aspirations of screenwriting and other fields in the media industry. He is an avid online gamer who frequently enjoys first-person shooters and real-time strategy games among other things. Being an Eagle Scout, Robert also enjoys camping and swimming.