The Business Development Manager (m/f/d) is responsible for identifying, developing, and securing new business opportunities across Exentec's portfolio of critical environment solutions and services. The role focuses on building customer relationships, generating qualified opportunities, supporting proposal development, and driving revenue growth within the semiconductor, data center, battery, life sciences, and advanced manufacturing markets. Working closely with engineering, operations, and project delivery teams, the Business Development Manager helps position Exentec as a trusted partner for cleanroom, dryroom, media systems, modular, installation, and facility solutions.