Senior Metal Bellows | 3,174 followers on LinkedIn. Custom Engineered Edge-Welded Metal Bellows Solutions for Aerospace / Defense / Semiconductor / Medical / Energy markets | Senior Metal Bellows was founded on a breakthrough process for creating welded diaphragm metal bellows in 1955. Our customers represent the top innovators in aerospace, defense, energy, medical devices, and semiconductor markets. Our core competencies are: »»problem solving and new product development »»designing for harsh environments »»designing for high reliability and high cycle life »»rapid proof of concept to production design cycle