Chiesa Shahinian & Giantomasi PC | 6,107 followers on LinkedIn. As a full-service law firm, Chiesa Shahinian & Giantomasi PC (CSG Law) assists a broad spectrum of clients in achieving their objectives by offering a comprehensive array of legal services. Clients ranging from private enterprises and governmental entities to individuals seek out the firm’s lawyers to provide strategic guidance and solutions. Recognized as a Regional Powerhouse by Law360 and Law Firm of the Year by the New Jersey Law Journal for the firm’s involvement in high-profile matters throughout the region, our more than 200 attorneys are dedicated to serving clients effectively and efficiently through offices in New Jersey and New York.