Gresham Partners LLC added Meredith W. Mendes as principal and chief operating officer.Mendes has managed and mentored teams performing strategic planning and analysis, finance, budgeting, accounting, audit, treasury, tax planning, pricing, technology, project and risk management, human capital, real estate, information services, records, office services and other operations. She was previously the executive director and COO at Jenner & Block.• Meyers & Flowers partner Michael W. Lenert obtained a $325,000 …