Sentinel Risk Group is an independent executive advisory firm. Through the discipline of Focused Clarity™, SRG provides the objective analysis and disciplined insight leaders need to see critical interdependencies, anticipate second- and third-order effects, and make informed executive decisions — turning operational complexity into Operational Clarity™.
Leaders today operate in decision environments of rising complexity, where consequence compounds and the window to influence the outcome narrows long before disruption arrives.
SRG was founded on a single conviction: organizational resilience begins with disciplined thinking, supported by a structured methodology — not a generic framework. We exist to give leaders objective analysis and disciplined insight into their operational environment while they still have the greatest ability to shape what happens next.
SRG is an independent executive advisory firm — not a security services company, a product reseller, or a compliance shop. We evaluate the operational environment as it is, reveal critical interdependencies, anticipate second- and third-order effects, and weigh alternative courses of action against consequence. The result is objective analysis and disciplined insight that strengthens executive judgment. SRG informs the decision; the leader makes it.
Mark Apperson · Founder, Sentinel Risk Group
Mark Apperson founded Sentinel Risk Group on more than 24 years leading, assessing, and sustaining complex operations in environments where continuity, communication, and leadership decision quality were not preferences — they were operational requirements. As a U.S. Army Special Forces Team Sergeant and Operations Sergeant, he led teams in sensitive, high-consequence environments across multiple theaters, including sustained operations in austere regions where dependencies were real and the cost of a poor decision under pressure was immediate and unforgiving.
That experience informs how SRG thinks about organizational risk — not through the lens of controls or compliance, but through the discipline of how leaders see, understand, and decide in complex environments. Focused Clarity™ informs SRG’s philosophy; SORP™ operationalizes it; and SORI™ provides the analytical output that supports executive decision-making.
These are the operating standards that govern every SRG engagement — built from environments where operational discipline, unconditional integrity, and commitment to the client’s actual outcome were not optional.
The client’s objective is the mission. We measure success by what changes in your risk environment — not by the weight of our report. We will never recommend a service you do not need.
We tell you what we found. All of it. Our findings are independent and ours alone. We will never shade an assessment to protect a relationship or win the next engagement.
We earn trust through execution. Your business is confidential. We will never reference your engagement without written authorization.
Complexity is expected. Every engagement receives our full effort from start to finish. We do not deliver incomplete work.
No two clients face the same threat environment. We build every assessment from scratch — around your actual reality, not a recycled framework.
People are the decisive terrain. We study the people, not just the systems. We listen before we advise.