83Zero Ltd

AI Engineer - Defence RAG Systems ( Security Clearance Essential ) On Site 2 X Days a week Plymouth Clearance: Active SC Essential Sector: Defence Role Overview Defence client requires an SC Cleared AI Engineer to build fully on-premises RAG systems using open-source technologies. You'll develop classified AI capabilities on air-gapped infrastructure with zero external dependencies. Key Responsibilities - Build end-to-end RAG pipelines on isolated defence networks using open-source LLMs (Llama 3, Mistral, Qwen) - Deploy local vector stores (Chroma, FAISS, Milvus) with sensitive document ingestion pipelines - Host and optimise LLMs using vLLM/TGI on local GPU clusters without internet connectivity - Implement agent orchestration using LangChain/LangGraph in completely offline environments - Design secure document processing for classified materials with appropriate data sanitisation - Build monitoring and evaluation systems that operate within air-gapped infrastructure Essential Requirements - Active SC Clearance (non-negotiable) - willingness to undergo DV if required - Demonstrable experience deploying open-source LLMs (Llama, Mistral, Falcon) on-premises - Expertise with local vector databases (Chroma, FAISS, Weaviate) in offline deployments - Strong vLLM/Text Generation Inference experience for high-throughput model serving - Proven ability to work on air-gapped systems with no external package repositories - Experience with GPU orchestration (NVIDIA A100/H100) and CUDA optimisation - Python expertise with offline dependency management and local package mirrors Technical Stack (All On-Premises) Models: Llama 3, Mistral, Qwen (locally hosted) Vector Stores: Chroma, FAISS, Milvus Orchestration: LangChain, LangGraph for agents Hosting: vLLM, TGI, Ollama on bare metal/private cloud Infrastructure: Air-gapped Kubernetes, local container registries Desirable Skills - Experience with defence/government IT security protocols - Knowledge of CIS benchmarks and NCSC guidelines - Familiarity with cross-domain solutions and data diodes - Understanding of classification marking and handling procedures

We are seeking and experienced Business Analyst to join a fast paced and growing Fin-tech organisation who are in the greenfield stage of a major transformation programme. You will be a key player in delivering a global payment platform at pace to enable pre-paid card services. As a Business Analyst you will support the Product & Technology team by providing detailed artifacts, to ensure the agile team has a thorough understanding of the product owner's perspective and can efficiently develop and deliver valuable features and how they interact with the back-end delivery domains/squads. A snapshot of what you'll do Break down large features into smaller, manageable user stories with clear acceptance criteria. Ensure user acceptance by collaborating with stakeholders, defining measurable outcomes, and ensuring clear communication. Document and ensure non-functional requirements (e.g., performance, security, scalability) are captured. Create visual representations of requirements (flowcharts, data flow diagrams, use case diagrams). What you'll bring Ideally Fintech or Payments experience. Strong communication skills, problem-solving, critical thinking, and the ability to analyse data and identify areas for improvement. Understanding of business processes and the ability to model them using diagrams, flowcharts, or other tools. Ability to build relationships, collaborate effectively with product and technical teams across multiple squads. Experience working with Product Owners to prioritise and define acceptance criteria. Ability to lead discussions, facilitate meetings, and guide stakeholders to consensus. Experience thriving in fast-paced, cross-functional team environments. A proactive mindset with strong analytical skills. Familiarity with Agile methodologies, particularly Scrum. If this role is of interest to you then please send your up to date CV to David Eales.

Provide expert 3rd line support for network-related incidents, changes, and service requests. We're Hiring a 3rd Line Network Specialist! Location: London / Hybrid Type: Full-Time Permanent Role Salary: 75,000 base salary plus benefits, perks and healthcare options and Competitive Bonus! Client: MSP (Managed Service Provider) What You'll Be Doing: Provide expert 3rd line support for network-related incidents, changes, and service requests Take ownership of escalated tickets and manage them through to resolution Design and implement infrastructure changes based on client requirements Collaborate closely with the 2nd Line Service Desk and Solution Delivery teams Mentor 2nd Line engineers and contribute to their technical development Create and maintain documentation, including Visio diagrams and technical summaries Participate in DR/failover testing and on-call support for critical issues Support new customer projects through configuration and technical input Our Technical Landscape Includes: Switching & Wireless: Cisco, Meraki, Aruba, HP, Dell, Juniper Security: Palo Alto, Fortinet, Cisco ASA, Prisma SD-WAN: Meraki, Viptela, Citrix, Nuage, Fortinet Infrastructure: Cisco NAC ISE, Cisco Nexus (7k, 5k, 2k), SD-A/DNAC Cloud & Automation: Azure, AWS, Python, Ansible What You'll Bring: Strong technical foundation equivalent to CCNP or JNCIP-ENT level Solid experience troubleshooting Layer 2/3 protocols, OSPF and BGP Hands-on experience with at least one enterprise firewall: Palo Alto , Fortigate , or Cisco ASA Proven ability to perform root cause analysis and resolve complex network issues Experience in a Managed Services Provider (MSP) environment Familiarity with cloud networking and automation tools Ready to take the next step in your networking career? Apply today and be part of a team where your skills and ideas make a real impact.

Operational Readiness Manager 12 month contract 600 per day (outside iR35) Start ASAP London / Hybrid (1-2 days per week on-site) We are seeking an experienced Operational Readiness Manager to oversee the preparation, transition, and stabilisation of operational teams during a large-scale transformation and data migration programme. The role is critical in ensuring operational continuity, managing the impacts of change on business functions, and driving readiness activities to support a seamless go-live. You will work closely with business units, operational teams, and technology leads to define readiness criteria, implement interim processes, and coordinate BAU start/stop planning. Additionally, you will provide leadership for incident management during and after the transition period. Operational Transformation Leadership: Lead the planning and execution of operational readiness activities for transformation and migration programmes in the financial services sector. Process Definition & Interim Operations: Design, document, and implement interim processes to maintain service delivery during transition periods. Oversee start/stop planning for BAU activities to ensure minimal disruption. Incident Management Leadership: Establish, lead, and coordinate incident management teams to address operational issues during migration and go-live phases. Drive swift resolution and escalation of critical issues. Stakeholder Management: Work with operational leads, technology teams, and senior executives to align readiness plans with programme timelines. Provide regular progress and risk updates to stakeholders, including executive leadership. Readiness Criteria & Testing: Define operational readiness criteria and ensure these are met ahead of go-live. Participate in cutover planning, business verification, and operational acceptance testing. If this role is of interest to you then please contact David Eales with an up to date CV.

We're looking for an experienced Sales Engineer to join a forward-thinking tech company supporting the growth of cutting-edge services in Networks, SD-WAN, SASE, andCyber Security. Interested in using your technical expertise to influence meaningful sales outcomes? Apply today and take your career to the next level in a collaborative and future-focused environment! Sales Engineer Salary: 50,000 plus 5,000 bonus, benefits, perks, and healthcare options Location: London (Hybrid - 2 to 3 days in office) Full-time Permanent Are you a technically-minded professional with a passion for networks, cybersecurity, and innovative IT solutions? We're looking for an experienced Sales Engineer to join a forward-thinking tech company supporting the growth of cutting-edge services in Networks, SD-WAN, SASE, and Cyber Security. This is a hybrid role based in London (2-3 days in the office), ideal for someone who thrives on translating complex technical solutions into real business outcomes. What You'll Be Doing As a Sales Engineer, you'll act as the bridge between the sales team and engineering functions-helping design, present, and guide the delivery of tailored technical solutions. You'll work closely with Presales, Solution Consultants, and Sales Teams across the entire solution lifecycle, from qualification through to delivery. Key Responsibilities: Act as a trusted technical advisor to sales and solution teams from early-stage engagement. Qualify opportunities from both a technical and commercial perspective. Respond to RFPs/tenders with technical and commercial insight. Architect and propose validated designs that align with customer needs. Deliver compelling presentations and product demonstrations (both in-person and remote). Maintain technical documentation and support teams through the order lifecycle. Collaborate with Product, Sales, Engineering, and Delivery teams. Constantly look for ways to improve how we work and deliver value. What We're Looking For Experience in the managed IT or telecoms sector. Solid knowledge of network principles (TCP/IP, routing protocols like OSPF & BGP, VRRP). Understanding of security concepts: firewalls, UTM, IPSec, SIEM, etc. Hands-on experience with at least two of the following: Networks, Cloud, Unified Communications, Cyber Security. Strong communication skills - capable of translating complex jargon to any audience. Excellent problem-solving and multitasking ability in a fast-paced environment. Desirable: SD-WAN & SASE experience. Understanding of public/private cloud architecture. Technical certifications are a plus. Commercial awareness and presentation skills. Apply today and take your career to the next level in a collaborative and future-focused environment.

Job Title: Data Migration Lead Location: London / Hybrid - Financial District Contract: 12 months (Outside IR35) Rate: 600 - 650 Reports to: Programme Director / Product Director A leading fintech payments company is seeking a highly experienced Data Migration Lead to oversee the end-to-end delivery of a complex migration programme. The successful candidate will bring strong expertise in financial services migrations, particularly in the secure transfer of card credentials and encryption keys, and will be confident managing both the technical and business aspects of large-scale migrations. This role is critical in ensuring the smooth, secure, and compliant migration of sensitive data, working closely with internal teams, third-party providers, and senior stakeholders, including board-level executives. Key Responsibilities Programme Leadership: Lead and manage the full lifecycle of complex data migration programmes, ensuring delivery on time, within scope, and to a high standard. Specialist Migration Expertise: Oversee the secure migration of card credentials, encryption keys, and other sensitive financial data, ensuring compliance with PCI DSS and relevant regulatory requirements. Card Scheme Migration Processes: Manage migration activities in line with card scheme processes, procedures, and compliance standards. Liaise with scheme representatives to coordinate approvals, testing, and go-live readiness. ETL Build & Implementation: Drive and lead the ETL (Extract, Transform, Load) process, ensuring efficient and accurate data movement. Work with development teams to ensure solutions meet security and performance needs. Data Verification & Reconciliation: Oversee validation processes to ensure data integrity pre- and post-migration. Lead reconciliation activities to confirm accuracy of migrated records, balances, and transactional histories. Stakeholder Management: Engage, influence, and manage relationships with stakeholders up to board level. Provide updates, risk assessments, and progress reports to steering committees and executive leadership. Risk & Compliance Oversight: Ensure all migration activities adhere to compliance obligations, governance standards, and data security policies. Skills & Experience Required 5+ years' experience leading complex data migration programmes in financial services. Proven expertise in securely migrating card credentials and encryption keys. Strong working knowledge of card scheme migration processes and requirements. Hands-on experience with ETL build and deployment. Deep understanding of data verification and financial reconciliation methodologies. Excellent stakeholder management skills, including board-level engagement. Strong problem-solving ability and resilience under pressure. Desirable Experience in a payments or card-issuing environment. Knowledge of PCI DSS compliance requirements. Familiarity with other card scheme migration processes (Visa, Amex). PRINCE2, PMP, or Agile project management certification. Why Apply? This is an opportunity to join a leading fintech payments company and play a pivotal role in a high-impact data migration programme. You'll be working in a fast-paced, innovative environment where collaboration, creativity, and delivery excellence are at the forefront. The role offers a hybrid working model and the chance to be part of a global transformation initiative.