Who We Are
EXARCH is an American firm developing and delivering capabilities across security, defense, critical infrastructure, and medical support in emerging and complex international markets.
We work from initial requirement through solution development, integration, deployment, training, and operational support, bringing together the people, technology, and partners required for execution.
Our personnel and specialist network draw from Western military, law enforcement, intelligence, medical, technical, and industrial backgrounds.
One integrated delivery model,
from requirement to operating capability.
CONSULTING
ADVISE & DEVELOP
We assess requirements and constraints, define the capability or project, and build the roadmap, stakeholder alignment, and delivery strategy needed to move it forward.
PROCUREMENT INTEGRATE & DELIVER
We source and evaluate technology, suppliers, and specialists, then structure procurement and coordinate OEMs, local partners, compliance, integration, logistics, and delivery.
OPERATIONS
DEPLOY & ENABLE
We deploy personnel or capability, train teams and align SOPs, support initial operations and adoption, and transition toward sustainable, client-owned capability.
Our Solutions
EXARCH supports clients in complex international environments across security, defense and public safety, critical infrastructure and logistics, and medical and emergency support.
Our work combines advisory, capability development, integration, training, and operational support to move complex requirements from initial need to practical execution.
We focus on practical outcomes: defining the requirement, structuring the approach, sourcing the right partners or suppliers, supporting implementation, and helping clients move from need to usable capability.
We support American interests abroad by helping clients solve complex security and operational challenges, stabilize demanding environments, and build practical capability alongside U.S. companies, government stakeholders, and partner nations.
Security
Security planning, protective support, movement, site/event security, operational security, and deployable advisory.
Defense & Public Safety
Law enforcement training, UAS/ISR, partner-force support, public safety capability development.
Critical Infrastructure
Project advisory, modular PMO, procurement, and local implementation support for constrained environments.
Medical
Operational medicine, remote medicine, EMT training, tactical trauma, emergency planning, and healthcare advisory.
Who We Support
Government & Public Sector
Corporate & Institutional Clients
Defense & Law Enforcement
Industrial, Infrastructure & Energy Operators
Healthcare & Medical Operators
Events, Exhibitions & High-Profile Engagements
High-Profile Delegations & Executive Leadership
About The Founder
Esteban Várady
Founder & Chief Executive Officer
Esteban Várady is a French Foreign Legion veteran with a background across military operations, software, and international business.
Born and raised in Venezuela, his experience in emerging markets and multinational operational environments informs EXARCH’s approach: understand conditions on the ground, define the real requirement, assemble the right people and technology, and stay engaged through execution.
As Founder & CEO, Esteban leads strategy and client engagements across security and defense, critical infrastructure, and medical support, working with clients, specialists, partners, and suppliers to turn complex requirements into practical, supportable capability.
About The Team
Brendon Marais
Security & Defense Consultant
Director, Security & Defense
French Foreign Legion veteran with an operational background in security, defense, and strategic management. He brings practical field judgment and a commercially informed perspective to engagement planning and delivery, with a focus on readiness, coordination, and ensuring that equipment, technology, and training meet real
operational requirements.
Brendon supports EXARCH’s security, defense, and public-safety engagements, including client and partner liaison, field representation, engagement planning, and coordination with specialists, suppliers, OEMs, and local partners.
Isak Djukic
Security & Defense Consultant,
Director, Medical Training
French Foreign Legion veteran with 12 years of military service. During eight years with the 2e Régiment Étranger de Parachutistes, he served as a paratrooper, team leader, and combat medic instructor, training more than 100 soldiers in casualty care and trauma response.
At Exarch, Isak leads training across civilian emergency medicine, remote medicine, and tactical trauma. He helped develop Exarch’s EMT and Remote Medicine program and supports curriculum development, practical instruction, and assessment for public-safety, military, security, and remote industrial personnel.
Carlos Várady
Critical Infrastructure & Commercial Advisor
Provides senior strategic advisory to EXARCH leadership on critical infrastructure, 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 infrastructure and industrial opportunities, market entry, partner strategy, pricing, contracting, project economics, and commercially disciplined growth. He helps translate complex technical, financial, and operational 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.
About EXARCH
exarch
noun | EK-sark
Historically, a governor of an outlying province of the Eastern Roman Empire, entrusted with both civil and military authority.
The name reflects EXARCH’s purpose: bringing strategic judgment, cross-functional leadership, and practical execution to demanding international environments.
EXARCH was built for clients operating in frontier and emerging markets, where infrastructure may be constrained, institutions and financing can be difficult to navigate, and solutions designed for developed markets do not always translate cleanly to local realities.
Our perspective is grounded in direct experience. EXARCH’s founder was born and raised in Venezuela before serving in the French Foreign Legion, a multinational military institution shaped by personnel from more than 140 nationalities. Across the firm and its specialist network, EXARCH draws on professionals shaped by similar combinations of military service, international business, technical expertise, and firsthand experience in emerging markets.
That background informs how we work. We go where our clients operate, engage directly with local partners and stakeholders, and account for the cultural, political, economic, security, and logistical conditions that determine whether a solution will work in practice.
The objective is not simply to deliver recommendations, but to help clients secure the expertise, equipment, and execution needed to build lasting capability. We help define requirements, structure achievable solutions, identify partners and suppliers, explore viable financing pathways, and support procurement, training, implementation, and operations on the ground.
EXARCH remains selective in the engagements it undertakes, allowing senior leadership and experienced specialists to remain directly involved from initial strategy through implementation.
Built for Demanding Environments
Boutique By Design:
Senior-led support for clients operating in complex international environments.
Cross-functional Network:
Western military, law enforcement, intelligence, medical, technical, and industrial backgrounds.
Security, Defense & Critical Infrastructure
Integrated advisory, technology, specialist expertise, and field support built around the client requirement.
Quality Over Scale:
Tailored support built for demanding environments.