ProCircular expands leadership across AI, cybersecurity and operations

ProCircular added and promoted leaders in AI and cybersecurity R&D, defensive security, governance, risk and compliance, customer service and finance as it pushes into its next phase of AI-driven growth. The moves are meant to strengthen both client-facing security work and the internal structure supporting the firm’s expansion.

Why it matters: - ProCircular is building out leadership in the parts of cybersecurity most affected by AI, including research, defensive operations and governance. - The expansion also strengthens customer service, finance and HR support as the firm scales. - The leadership changes are tied to ProCircular’s next stage of AI-driven growth.

What happened: - ProCircular expanded its leadership team across AI and cybersecurity R&D, defensive security, governance, risk and compliance, customer service and business operations. - Aaron Warner, ProCircular CEO, said the company is looking for people who combine innovation, capability and care. - Jim Sherlock became Vice President of AI and Cybersecurity R&D. - Tim Lansing became Director of Defensive Security Operations. - Andrew Chipman was promoted to Director of GRC & Information Security Officer in June. - Andy Roethler joined as Customer Service Manager in May. - Rachelle Sieverding rejoined as Controller in May.

The details: - Jim Sherlock leads research and development for ProCircular’s AI and cybersecurity tooling. - Jim Sherlock’s work includes multi-agent systems for offensive security, threat intelligence and incident triage. - Sherlock joined ProCircular in 2025 as a senior offensive security engineer. - At ProCircular, Sherlock led cloud security assessments for mid-market clients while building the firm’s software development team. - Sherlock is also co-founder and CTO of Cybercade, a games-based security awareness platform. - Before ProCircular, Sherlock spent nearly two decades at Pearson. - At Pearson, Sherlock founded the Assessment Information Security Office and led the migration of Pearson’s assessment platforms to AWS. - Sherlock was lead inventor on a patented real-time anomaly detection system protecting online testing for more than 240 million users. - Sherlock’s commentary on agentic AI and offensive security has appeared in TechRadar, InfoWorld and VKTR. - Tim Lansing leads ProCircular’s Defensive Cyber Operations Security Operations Center, Incident Response and Security Engineering teams. - Lansing joined ProCircular in May. - Lansing is helping advance automation in defensive operations and the responsible integration of AI. - Lansing previously led the Americas Incident Response team at Check Point Software. - Lansing also held Cyber Threat Intelligence, Security Operations Center and Incident Response roles at RTX, AT&T and Collins Aerospace. - Before the private sector, Lansing served nearly nine years in the U.S. Marine Corps. - In the Marine Corps, Lansing led a roughly 60-person infantry battalion communications team. - Lansing also contributed to intelligence activities at National Security Agency Hawaii. - Lansing holds the CISSP and earned the GIAC Security Expert in 2023. - Andrew Chipman leads ProCircular’s Governance, Risk and Compliance practice. - Chipman also leads internal security efforts for the company’s risk management, governance and compliance programs. - Chipman helps direct strategy for existing and newly developed GRC services and products. - Chipman has been with ProCircular for more than seven years. - Chipman previously served as GRC Manager. - Chipman previously held information security leadership roles at StoneX Group and Group O. - Chipman holds CISA, CISM, CISSP and CCISO certifications. - Andy Roethler manages client relationships and leads client experience and retention efforts. - Roethler brings nearly 25 years of customer care and operations experience from Integrated DNA Technologies. - At Integrated DNA Technologies, Roethler led multiple customer care teams and improved customer satisfaction, operational efficiency and service delivery. - Rachelle Sieverding oversees ProCircular’s accounting operations and financial reporting. - Sieverding’s responsibilities include accounts payable, accounts receivable, general ledger, payroll and month-end close. - Sieverding works with the CFO/COO on budgeting, cash flow and financial planning. - Sieverding also supports much of the company’s human resources function, including recruitment, compensation and benefits, employee relations, compliance and workforce planning. - Sieverding previously spent nearly three years with ProCircular in payroll and benefits before rejoining in May.

Between the lines: - ProCircular is signaling that AI is becoming embedded in both offensive and defensive security operations, not treated as a separate initiative. - The hiring and promotions also suggest the company is prioritizing operational maturity alongside technical growth. - The mix of internal promotions and outside hires indicates ProCircular wants continuity in core practices while adding fresh expertise.

What's next: - ProCircular is expected to keep investing in cybersecurity and AI research. - The company is also likely to keep translating research into practical client tools, assessments and response services. - The expanded leadership team should support growth across monitoring, incident response, advisory, AI risk and compliance.

The bottom line: - ProCircular is widening its leadership bench to support a broader, AI-focused security business while shoring up the operations needed to scale.