There’s a scene change coming at Wallingford-based VBrick Systems. Vince Graziani, previously senior director of business development and strategic alliances at Broadcom Corp., will replace Fred Geyer as CEO. Geyer, who has been with VBrick for seven years, will remain on the board of directors. Over the last 20 years, Graziani has also held leadership positions with Sandburst, Intel and Siemens. Graziani is known for his ability to increase market share and implement new product development plans.