Meet the Core Guard Group Team

Deborah Adewunmi

Chief Operating Officer and Operations Lead

Leads operational coordination, performance tracking and internal accountability across Core Guard Group. Key expertise: Operations, project coordination, KPI management and process improvement.

Katherina Pessoa

Office Manager

Customer service and operations professional with over 15 years of experience, focused on client experience, administrative coordination and process improvement. Key expertise: Customer service, office management, operational coordination and client relationships.

Kifayat Ullah

R&D Director and Senior Software Developer

R&D and software development leader guiding Sentinel Access’s architecture, integrations and technical roadmap. Key expertise: Enterprise software architecture, SDK and API development, access-control integrations, smart-card technologies, biometric systems, cloud applications and technical R&D.

Devon Javara

Backend & Cloud Engineer

Backend and cloud engineer building the scalable services, cloud infrastructure and automation behind Sentinel Access. Key expertise: Node.js and NestJS backends, AWS cloud architecture, CI/CD, GraphQL and database design.

Jayesh Patel

Full-Stack Developer

Full-stack developer on the Sentinel Access team, specialising in generative AI, retrieval-augmented generation (RAG), agentic and multi-agent systems, biometric identification and scalable access control solutions. Key expertise: Generative AI, RAG, agentic AI, multi-agent systems, full-stack development, biometrics and access control.

Dwayne Neufville

Managing Director and Group Founder

Security technology and enterprise integration specialist with more than 20 years of experience across IT, biometrics, access control, commissioning and international technical operations. Key expertise: Biometrics, enterprise security, technical leadership, integrations and strategic partnerships.

Wilfried Gnan

Technical Customer Service Director

Leads technical support operations, service processes and customer escalation management across Core Guard Group. Key expertise: Technical support, SLAs, troubleshooting, service operations and customer care.

Daniel Tatt

Director of Operations Engineering

Operations engineering leader supporting installation readiness, site preparation and field delivery of physical security projects. Key expertise: Installation planning, equipment and hardware coordination, commissioning support and field engineering.

Technical Support Specialist with over ten years of experience in security, access control and customer service. Key expertise: Technical troubleshooting, access control systems, customer support and security technology.

Jennifer Auguste

Sales Director

Commercial sales leader with extensive experience in access control, door-entry systems, intralogistics and consultative selling. Key expertise: Consultative selling, account development, customer relationships and commercial strategy.

Supports Core Guard Group's legal structure, governance, investment readiness and commercial protection as the company expands internationally. Key expertise: Governance, contracts, investment structures, compliance and corporate risk.

Samuel Nelson

Group Finance Director

Group Finance Director overseeing global financial architecture, commercial pricing controls and multi-entity operations across the UK, North America and international markets. Key expertise: Financial modelling, unit economics, risk management, gross-margin guardrails and technical infrastructure economics.