Apex is a US-based multidisciplinary consulting and engineering services firm with a robust portfolio of capabilities in water, environmental, ESG and resiliency, health and safety, compliance and assurance, and infrastructure. Apex operates in all 50 states and maintains a highly capable and diverse team of over 1,100 scientists, geologists, engineers, analysts, technicians, and data management specialists. Acquired by Morgan Stanley Capital Partners in 2023.