Keystone Executive built a deployable AI Control Architecture (ACA) MCP Gateway that runs inside an environment, infrastructure, and Anthropic key.

Keystone Executive is senior operating capacity for the Office of the CISO. We work alongside your security leader as a trusted Deputy CISO or Chief of Staff, under their authority providing independent counsel on the decisions that matter and the delivery capacity to carry critical work through to completion. We strengthen the CISO already in place. We do not replace them. Every security team carries strategy, delivery and operations. Then a fourth load lands on the CISO alone: board and regulatory reporting, assurance and evidence, programme governance, and the crossfunctional priorities no one else owns. Keystone carries that weight visibly, and under your name. We engage three ways. Counsel — independent judgment on consequential decisions. Office of the CISO — ongoing senior capacity, delivered as Deputy CISO or Chief of Staff. Mission — a single defined outcome, owned through to completion. One accountable partner leads; a multidisciplinary team delivers behind them