We are looking for an experienced Security Network Engineer to support and strengthen a data center environment in California. This long-term contract opportunity is ideal for a senior specialist who brings deep expertise in secure network operations, infrastructure monitoring, and enterprise firewall administration. The role focuses on maintaining a reliable, high-performing network across a smaller infrastructure footprint while partnering with teams that operate during Pacific Time hours.<br><br>Responsibilities:<br>• Manage and optimize secure network infrastructure across data center switching, routing, and firewall platforms.<br>• Administer firewall environments and centralized policy management tools to maintain strong security controls and network availability.<br>• Monitor network performance and security events, identify issues proactively, and drive timely resolution of incidents.<br>• Support day-to-day operations for a compact but critical infrastructure environment with a focus on stability and efficiency.<br>• Implement configuration changes, upgrades, and troubleshooting activities across core networking components.<br>• Use network monitoring platforms such as SolarWinds to track health, capacity, and performance trends.<br>• Contribute technical expertise on Cisco-based environments, including Nexus platforms where applicable.<br>• Collaborate with internal stakeholders and remote teams to ensure dependable support coverage during Pacific Time business hours.
We are looking for a skilled Network & Systems Administrator to support and strengthen a hybrid IT environment in California. This contract opportunity with potential for a permanent role is ideal for someone who combines strong systems administration expertise with hands-on network support and end-user troubleshooting. The role will focus on maintaining core infrastructure, improving platform reliability, and helping advance security-focused initiatives across the organization.<br><br>Responsibilities:<br>• Administer and support Windows-based server environments, ensuring stable performance, availability, and timely issue resolution.<br>• Manage identity and access services through Active Directory and Entra, including user administration, permissions, and policy enforcement.<br>• Provide support for endpoint management tools such as Intune to maintain device compliance, configuration, and deployment standards.<br>• Oversee Microsoft 365 administration and assist with SharePoint organization, maintenance, and content cleanup efforts.<br>• Troubleshoot and support core network components, helping maintain connectivity, performance, and dependable daily operations.<br>• Deliver desktop and user support for Windows 10 environments, resolving hardware, software, and access-related issues.<br>• Maintain and support infrastructure involving Dell technologies and Citrix platforms where needed across the environment.<br>• Contribute to cybersecurity implementation efforts by assisting with compliance measures, security controls, and operational best practices.
We are looking for an experienced Sr Network Engineer to support and strengthen a hybrid enterprise infrastructure in Concord, California. This role focuses on designing, optimizing, and securing network environments that enable dependable connectivity, protected data exchange, and stable day-to-day operations. The ideal candidate brings strong technical depth across cloud and on-premises platforms, a practical troubleshooting mindset, and the ability to communicate effectively with both technical and non-technical stakeholders.<br><br>Responsibilities:<br>• Design, maintain, and enhance network infrastructure across routing, switching, wireless connectivity, firewall platforms, VPN services, and hybrid Azure-integrated environments.<br>• Develop and uphold network architecture standards, technical documentation, and long-term infrastructure plans that improve performance, segmentation, and security.<br>• Administer and support a hybrid Microsoft ecosystem, including cloud and on-premises services, to ensure reliable access and operational continuity.<br>• Manage the Hyper-V environment and related infrastructure components to maintain availability, scalability, and system efficiency.<br>• Investigate and resolve complex network and connectivity issues, serving as an escalation point for advanced incidents and selected help desk matters.<br>• Oversee backup operations for critical systems and verify that recovery processes align with business continuity needs.<br>• Partner with IT leadership and security stakeholders to implement preventive safeguards and contribute to incident response efforts.<br>• Provide technical guidance to end users and entry-level team members while promoting strong service standards and timely issue resolution.<br>• Monitor industry developments, evaluate emerging technologies, and recommend improvements that strengthen the overall network environment.<br>• Travel occasionally to support offices or operational needs as required.
<p>We are looking for an experienced Network/Systems Manager to join our team in Livermore, California. This is Network/Systems Manager a Contract-to-Permanent position offering an opportunity to lead and oversee critical network operations while collaborating with management and technical teams. The ideal Network/Systems Manager will take ownership of network systems, provide strategic recommendations for improvements, and ensure seamless technology operations across multiple sites. This is an onsite position sitting in Livermore, Ca. </p><p><br></p><p>The ideal Network/Systems Manager will have Palo Alto firewall experience, strong Cisco networking skills, and a background in Active Directory, VMware, and Google Workspace. The Network/Systems Manager will also help manage security in collaboration with our managed security provider, including patch management, configurations, and oversight of new firewall deployment. Experience with Cisco VoIP systems—particularly in design and configuration—is preferred. </p><p><br></p><p>When the current manager is out, this Network/Systems Manager role will act as the primary liaison to upper management, requiring excellent communication skills and the ability to present clearly to executives. You will also be the go-to person for staff when issues arise, ensuring problems are addressed quickly and effectively.</p><p><br></p><p>Responsibilities:</p><p>•<strong>Key Responsibilities</strong></p><ul><li>Oversee the network and virtual server environments, ensuring reliable and secure operations across all sites.</li><li>Administer LAN/WAN infrastructure including Cisco network equipment, virtualization platforms (VMware), Active Directory, user accounts, and network services.</li><li>Manage and configure firewalls (Palo Alto) and coordinate with security providers for patching, monitoring, and threat mitigation.</li><li>Oversee deployment of new network and security hardware, including upcoming firewall projects.</li><li>Configure and support Cisco VoIP systems, including design and implementation.</li><li>Troubleshoot and resolve hardware, software, and network issues to minimize downtime.</li><li>Evaluate requests for technical assistance, determine appropriate actions, and assign resources accordingly.</li><li>Collaborate with leadership to plan short- and long-term technology upgrades, replacements, and system improvements.</li><li>Design and optimize network architectures (e.g., VLAN, VPN, routing, content filtering, QoS, IDS/IPS, etc.) for high performance and security.</li><li>Install and update network software, service packs, and security patches across multiple platforms.</li><li>Monitor servers, appliances, and network devices to ensure proper performance and availability.</li><li>Lead technology projects, including migrations, new implementations, and product evaluations, ensuring they meet deadlines and quality standards.</li><li>Coordinate with internal teams, vendors, and contractors to complete projects and resolve issues efficiently.</li><li>Prepare documentation including network maps, technical reports, procedures, and recommendations for improvements.</li><li>Stay informed on industry trends, tools, and best practices to inform purchasing and operational strategies.</li><li>Act as a primary contact for management, providing updates, reports, and recommendations.</li></ul><p><br></p>
<p>Robert Half is seeking a Software Engineer II – AI Engineer who will analyze, design, program, debug, test, implement, deploy, and support software enhancements and new applications using Generative AI technologies. This role contributes to the development and production deployment of GenAI-enabled applications, including LLM-powered workflows, RAG pipelines, and AI-driven user experiences. </p><p> </p><p>This role supports SDLC documentation across all phases, with a focus on deployment, evaluation, observability, safety, and monitoring. It also interacts with users to define requirements and support applications in production. </p><p><strong>What You’ll Do</strong> </p><ul><li>Develop and modify application modules, including GenAI components. </li><li>Build prompt workflows, retrieval layers, APIs, and cloud services. </li><li>Troubleshoot production issues, including latency, hallucinations, and errors. </li><li>Provide Level II production support for deployed systems. </li><li>Design components, including LLM integrations and RAG pipelines. </li><li>Implement CI/CD pipelines, containerization, and release processes. </li><li>Develop RAG pipelines with embeddings, chunking, and vector search. </li><li>Apply prompt engineering techniques, including few-shot prompting and structured outputs. </li><li>Evaluate models for accuracy, relevance, and hallucination risk. </li><li>Implement safety guardrails, including PII protection and prompt-injection defense. </li><li>Execute testing, including unit, integration, and GenAI evaluation testing. </li><li>Monitor production systems for latency, cost, usage, and errors. </li><li>Support incident management with fallback and recovery strategies. </li></ul><p><br></p>