Niki advocates for clients in jury and bench trials involving a variety of claims, including contract, construction defect, product liability, wrongful death and personal injury, professional liability and malicious prosecution. She recognizes the benefits of early resolution through the use of mediation and early dispositive motions. Niki has also assisted clients with administrative matters before the federal Occupational Safety and Health Administration and its Review Commission, several state OSHA offices, the U.S. Equal Employment Opportunity Commission, the Department of Transportation, Federal Motor Carrier Safety Administration, and other regulatory agencies.

In 2013, Niki was recommended to President Barack Obama by Senator Mark Pryor for consideration to fill the vacant position of U.S. District Judge, Western District of Arkansas.