Discover Our Expertise
Yarnell Consulting: Your Trusted Partner in Innovation
At Yarnell Consulting, we specialize in delivering cutting-edge solutions tailored to meet the unique needs of our clients. Explore our services and see how we can help your business thrive.
Our Journey and Vision
Yarnell Consulting was founded to provide organizations with direct access to senior-level IT and cybersecurity expertise for environments where reliability, security, and accountability are essential. As an independent consulting practice, every engagement is led personally by the firm’s principal consultant, ensuring consistent leadership, hands-on execution, and solutions aligned with each client’s mission, regulatory requirements, and operational priorities. The focus is on designing and managing technology infrastructures that are secure, resilient, and built to scale with confidence.
Yarnell Consulting’s vision is to guide organizations through an increasingly complex technology and security landscape with clarity and confidence. By combining practical experience with forward-looking design, the firm helps clients address today’s challenges while preparing for future demands. Grounded in integrity, accountability, and continuous learning, Yarnell Consulting builds trusted partnerships that support informed decision-making, reduced risk, and long-term operational success.
Mark Yarnell, Founder & Principal Consultant
Mark Yarnell is a seasoned IT security and network consulting professional with decades of experience designing, securing, and managing enterprise and public-sector technology environments. His background spans network architecture, cybersecurity, Microsoft infrastructure, and cloud solutions, with deep experience supporting education, government, and law enforcement organizations. Mark founded Yarnell Consulting to provide clients with direct access to senior-level expertise, personalized service, and solutions built on proven best practices—not layered staffing models.
Our Consulting Services
Network Solutions
Enterprise-grade network architectures are designed and implemented with a focus on availability, segmentation, and defense-in-depth. Solutions incorporate secure routing and switching, VLAN and network segmentation, firewall policy design, VPN and remote access controls, and continuous monitoring to reduce attack surface and improve resilience. Architectures are aligned with organizational risk tolerance, regulatory requirements, and growth strategy, providing a secure and scalable foundation for mission-critical operations.ndation that can grow with future needs.
Server & Client Systems
Microsoft Windows Server and Windows Workstation environments are architected and managed with an emphasis on Active Directory design, DNS and DHCP integration, Group Policy enforcement, and security baseline hardening. Implementations prioritize secure identity management, patching and update strategies, role-based access control, and endpoint protection to support compliance, operational stability, and long-term maintainability across the infrastructure lifecycle.
Microsoft 365 & Azure Solutions
Microsoft 365 environments are architected and implemented using a Zero Trust security model, with identity as the primary control plane. Solutions include tenant architecture design, Entra ID (Azure AD) configuration, multi-factor authentication (MFA) enforcement, and conditional access policies that continuously validate user identity and device posture. Email and collaboration services are secured using Microsoft Defender, advanced phishing protection, and data loss prevention controls. Implementations are aligned with compliance requirements and Microsoft security best practices, enabling productivity while protecting identities, communications, and sensitive data across the Microsoft 365 ecosystem.
Azure environments are designed and implemented with a focus on secure cloud architecture, identity integration, and workload protection. Solutions include Azure landing zone design, secure network segmentation, Entra ID integration, role-based access control, and policy enforcement. Security controls such as Azure Firewall, Defender for Cloud, logging, and monitoring are implemented to reduce risk and provide visibility across cloud resources. Architectures are built to support scalability, resiliency, and compliance while maintaining strong governance and cost control.
Cybersecurity Services
Cybersecurity services focus on reducing risk through layered defenses, strong identity controls, and continuous monitoring. Solutions include security architecture design, risk assessment, policy development, and alignment with frameworks such as NIST and CJIS where applicable. Emphasis is placed on Zero Trust principles, identity protection, endpoint and email security, vulnerability reduction, and incident preparedness. The goal is to strengthen organizational resilience, improve threat detection, and ensure security controls are integrated across network, endpoint, cloud, and user environments.
Connect with An Expert Today
Ready to enhance your organization's IT infrastructure? Yarnell Consulting is here to help. Reach out now to discover how our tailored solutions can meet your unique needs. Contact us today to schedule a consultation and take the first step towards a more secure and efficient future.