In the law firmsO’Connor & Battle LLP elevated Robert J. Cheris to partner.Cheris, a trial lawyer, has focused his practice on medical-malpractice defense for more than seven years.Previously, he worked at Rush University Medical Center legal affairs office.• Chicago Law Partners LLC added Danielle N. Twait as an attorney in its trade and association law practice.Twait has counseling and litigation experience, including matters involving defamation, invasion of privacy, commercial contracts, class actions …