Mayer Brown LLP added Jenny A. Austin as a partner in the firm’s Tax Controversy practice. She was previously a partner at Morgan Lewis & Bockius LLP.Austin concentrates her practice on federal tax controversy and litigation, working across all industries, including medical device, pharmaceutical, health care, retail and tech.• Laner Muchin Ltd. added Christina Krivanek Wernick as of counsel to the firm’s Counseling and Transactional, Employee Benefits and Executive Compensation, Labor Management …