[4] Later, Mullarkey developed expertise in race and gender discrimination cases under Title VII of the 1964 Civil Rights Act.
[4] Governor Roy Romer appointed Mullarkey to the Colorado Supreme Court on June 29, 1987.
[4][5] During her 23-year tenure on the Colorado Supreme Court, Mullarkey heard more than 30,000 cases and authored 472 opinions.
She helped to increase Colorado's number of judges by 27 percent, remodel courthouses, institute judicial training and juror appreciation programs, and turn Colorado's judicial system into a national technological model.
Prior to retiring, Mullarkey worked to bring to fruition the state-of-the-art Ralph L. Carr Colorado Judicial Center in Denver.