Why EXARCH Exists
EXARCH was built for clients operating in demanding environments where infrastructure is constrained, conditions are unforgiving, and dependable capability matters.
The firm was built around a simple principle: effective outcomes come from strategic planning, experienced professionals, and mission-critical technology, not scale alone.
Founded by a military veteran with a software background, EXARCH was created to address a gap in frontier and emerging markets for tailored security and defense tech solutions that could combine trusted U.S. and Western personnel with cutting-edge technology sourcing and implementation.
That foundation gave EXARCH a natural path to expand beyond its original security and defense technology focus into adjacent capability areas including dual-use solutions, industrial and infrastructure support, and medical advisory and operational support.
From the outset, the firm was developed as a curated network of operational, technical, medical, industrial, and defense professionals, supported by relationships across the defense, dual-use, and industrial OEM base.
Specialist by design, EXARCH remains focused on select engagements where senior involvement, sound judgment, and real-world execution make the difference.
Our Team
Esteban Várady
Founder & Director
Military veteran and founder of EXARCH with a background spanning operations, technology, and international business in complex environments. Brings a blend of field experience and software-informed thinking to the design of practical solutions for clients operating where conditions are demanding and capability has to hold up in the real world.
Leads EXARCH’s strategy, client engagement, and execution across security consulting and operations, defense and dual-use advisory, and technology procurement and integration. Oversees engagement scoping, partner alignment, and delivery, helping translate client requirements into disciplined, mission-ready capability.
Brendon Marais
Security & Defense Consultant, Operations Lead
Military veteran with an operational background in security and defense and a strong interest in emerging defense and dual-use capabilities. Brings practical field perspective, readiness focus, and an applied understanding of how planning and technology come together in demanding environments.
Supports planning, operational coordination, procurement, and client delivery across security, defense, and dual-use engagements. His role includes OEM outreach, sourcing support, partner coordination, and execution support, while serving as the Director’s principal operational deputy in the day-to-day management of engagements.
Carlos Várady
Financial & Commercial Advisor
Provides senior strategic advisory to EXARCH leadership on commercial structuring, financial oversight, and governance. He brings extensive leadership experience across energy and industrial services, with a foundation as a Petroleum Engineer and Geologist and doctoral research focused on efficiency technologies and the economic viability of sustainable solutions.
Supports leadership decision-making on market entry, partner strategy, pricing, contracting, and commercially disciplined growth, helping translate complex technical and financial considerations into clear direction for client engagements and long-term execution.
Dr. Elias Querales, MPH, CCRP
Medical Advisor
Medical Doctor, public health professional, and certified clinical research leader with more than 20 years of experience across clinical quality, healthcare systems, medical devices, pharmaceuticals, and research operations. He brings deep expertise in quality systems, regulatory and audit readiness, medical education, and healthcare operational improvement across both private-sector and academic settings.
Advises EXARCH on medical and healthcare-related engagements, supporting clinical quality, governance, operational medical readiness, hospital and health-system support, medical procurement, and the development of SOPs, training standards, and readiness frameworks that strengthen client capability across operational, institutional, and civilian contexts.
Built for Demanding Environments
U.S.-based boutique firm:
Senior-led support for clients operating in complex international environments.
Cross-functional network:
Western military, law enforcement, intelligence, medical, technical, and industrial backgrounds.
Integrated capability:
Security, defense and dual-use advisory, mission-critical technology, and medical readiness brought together in one model.
Quality over scale:
Tailored support built for demanding environments.
Our values
EXARCH is guided by a simple set of principles: disciplined execution, experienced judgment, practical capability, tailored support, and quality over scale. These values shape how we engage clients, select partners, and deliver work in demanding environments.
-
Operational Discipline
-
Senior-Led Engagement
-
Practical Capability
-
Tailored Support
-
Quality Over Scale
Standards & Governance
EXARCH operates in alignment with internationally recognized best practices, including ISO 18788, ISO 31000, ISO 31030, ISO 22301, ISO 9001, ISO 27001 principles, and ISO 45001. These frameworks inform our approach to governance, structured planning, quality assurance, information security, business continuity, and dependable delivery across security, defense and dual-use consulting, technology procurement and integration, and medical advisory and operational support.
Our work is further informed by applicable U.S. legal and regulatory frameworks, including the International Traffic in Arms Regulations (ITAR), administered by the U.S. Department of State’s Directorate of Defense Trade Controls (DDTC), and the Export Administration Regulations (EAR), administered by the U.S. Department of Commerce’s Bureau of Industry and Security (BIS), alongside relevant sanctions and export-control compliance frameworks, established U.S. military and law enforcement doctrines, the UN Guiding Principles on Business and Human Rights, and applicable national regulatory regimes.
As an American firm, EXARCH is oriented toward supporting U.S., allied, and partner interests abroad through disciplined, accountable, and professionally governed engagements.
