NDA, Cybersecurity | Senior Systems Engineer

On behalf of NDA, Cybersecurity, SD Solutions is looking for a talented Senior Systems Engineer

You will serve as a technical expert responsible for designing, deploying, securing, and supporting customer environments across cloud, on‑prem, and hybrid infrastructures.

SD Solutions is a staffing company operating globally. Contact us to get more details about the benefits we offer.

Responsibilities:

• Architect, deploy, and maintain Microsoft 365, Azure, Azure AD (Entra ID), and Azure Virtual Desktop (AVD) environments.
• Manage and optimize Windows Server ecosystems, including Terminal Servers, Remote Desktop Services (RDS), and Remote Desktop farms.
• Perform advanced troubleshooting and resolution for system performance issues, authentication problems, networking, DNS, storage, virtualization, CPU spikes, storage failures, service outages, domain trust issues, and authentication failures.
• Oversee and execute migrations for Microsoft 365, Exchange, file servers, cloud workloads, and related environments.
• Implement and manage enterprise security tools, including Sophos Central, Windows Defender, and SonicWall firewalls (with advanced rule tuning, NAT, VPN configuration).
• Conduct vulnerability mitigation, system hardening, firewall rule optimization, and security policy enforcement in line with best-practice cybersecurity frameworks.
• Serve as Tier 3–4 escalation point for complex support tickets involving servers, cloud services, firewalls, identity management, or high-severity incidents.
• Participate in on-call rotation to respond to critical alerts and high-severity incidents.
• Create and maintain comprehensive documentation, runbooks, environment diagrams, and knowledge base resources to enhance team operations and efficiency.
• Recommend infrastructure improvements focused on reliability, security, and performance.
• Develop and implement automations, scripts, policies, and configurations using PowerShell, Intune, Azure Automation, Group Policy, and related tools.

Requirements:

• 5+ years of experience in a Senior Systems Engineer, Cloud Engineer, or Infrastructure Engineering role, preferably in a fast-paced Managed Service Provider (MSP) environment.
• Advanced proficiency in Microsoft 365, Azure, Azure AD/Entra ID, Windows Server (2012–2025), Terminal Server/RDS/AVD, Intune and endpoint management, VMware, and/or Hyper-V virtualization.
• Strong hands-on experience with SonicWall and Sophos firewalls (including advanced rule tuning, NAT, VPN), Sophos Central, DNS, DHCP, Group Policy, and Active Directory/domain services.
• Proven track record of handling advanced escalations and resolving complex technical issues under pressure.
• Excellent communication and customer-facing skills for interacting with clients and stakeholders.
• Strong documentation discipline and ability to produce clear, detailed technical materials.
• Ability to thrive in a high-pressure environment, manage multiple priorities, and demonstrate an ownership mentality with a strong commitment to service excellence.

Advantages:

• Opportunity to work as a technical expert in a leading managed cybersecurity and IT services company, protecting businesses from cyber threats, ransomware, and data breaches.
• Engage in diverse, challenging work across cloud, on-premises, and hybrid infrastructures with high-impact responsibilities in architecture, security hardening, incident response, and automation.
• Contribute to continuous improvement through automation development and infrastructure optimization recommendations.
• Potential for professional growth in a specialized MSP environment serving clients nationwide and beyond.

About the company:

NDA, offers a comprehensive cybersecurity platform providing companies with both the technology and, more importantly, expertise needed to defend themselves from hackers, data breaches, ransomware, and other external threats. It reduces reputational risk and affords companies peace of mind, knowing their businesses are constantly being monitored and protected by some of the world’s top cybersecurity experts.

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