Senior Systems Engineer

Denver, CO/Remote with periodic onsite | Full Time

Are you looking to make a meaningful impact in a growing, Colorado-based managed IT services team? If routine, repetitive support work isn’t your style, and you thrive on tackling complex, high-impact challenges, this role could be for you. From owning critical incident resolution to working with cutting-edge technologies on dynamic projects, you’ll play a key role in driving client success.

As a Senior Systems Engineer at Istonish, you’ll be part of a collaborative IT Engineering/Support team responsible for both internal systems and a diverse client environment. In this role, you’ll handle advanced support escalations, respond to infrastructure alerts, and work hands‑on with a wide range of modern hardware and software solutions. You’ll partner closely with team members to troubleshoot and resolve complex issues—while enjoying a fast‑paced environment where no two days are the same.

• Design and implement enterprise-level infrastructure solutions for multi‑client managed services environment, including cloud migrations and hybrid deployments across Azure and AWS platforms, ensuring scalability, security, and high availability.
• Act as the primary escalation point for complex technical issues spanning Windows Server, Exchange Online, Microsoft 365, Active Directory, and virtualization platforms (VMware/Hyper‑V), resolving critical incidents in alignment with SLA requirements.
• Drive end‑to‑end infrastructure projects, from planning through execution, collaborating with cross‑functional teams and mentoring junior engineers on advanced troubleshooting techniques and best practices.
• Design, develop, and deploy Power Shell automation to streamline operations and improve efficiency, while maintaining detailed technical documentation for systems, procedures, and ITIL‑aligned processes.
• Provide strategic technical advisory services to clients, optimizing infrastructure performance and guiding technology roadmaps, while managing vendor relationships and participating in stakeholder meetings.
• Enforce and maintain security best practices across managed environments, performing regular security assessments, remediating vulnerabilities, and ensuring compliance with industry standards.

• Minimum of 5+ years of experience supporting Microsoft server environments, including Windows Server 2022 and 2025.
• Hands‑on experience with Microsoft Exchange, Exchange Online, and Microsoft 365 (O365).
• Strong expertise in Active Directory administration and management.
• Experience with virtualization technologies, including VMware and Hyper‑V configuration and operations.
• Solid understanding of core networking concepts such as DNS, DHCP, and TCP/IP.
• Experience working with cloud platforms, specifically Microsoft Azure and/or AWS.
• Knowledge of Microsoft clustering technologies.
• Proficiency in developing, testing, and deploying Power Shell automation scripts.

• Experience with Fortinet networking and security solutions.
• Familiarity with Commvault backup solutions.
• Current Microsoft certifications (e.g., MCSE, MCP, Azure certifications).
• Knowledge of SAN/storage technologies (e.g., EMC Unity, Net App).
• Hardware troubleshooting experience with Dell and/or HP systems.
• Scripting and leveraging AI agents to turn repetitive tasks into automation.

• Strong communication skills with a professional, detail‑oriented approach.
• Ability to present information clearly with a business‑friendly and approachable demeanor.
• High level of professionalism and commitment to continuous improvement.
• Strong multitasking abilities with flexibility to adapt to changing environments and priorities.
• Critical thinking skills with the ability to make sound decisions based on limited information.
• Self‑motivated, team‑oriented mindset with a proactive, results‑driven (“get‑it‑done”) attitude.
• Ability to effectively prioritize and manage competing requests in a fast‑paced environment.

• Familiarity with ITIL frameworks and best practices is a plus.
• Relevant industry certifications are highly valued.
• This role involves working in a dynamic environment where clients, technologies, and processes frequently change—adaptability is essential.
• The organization supports and encourages ongoing professional development and continuous learning.
• Growth opportunities are available for motivated, high‑performing, and professional team members.

• Competitive salary: $100,000 - $130,000 annually (based on experience)
• Comprehensive health, dental, and vision insurance.
• 401(k) with company match.
• Flexible work arrangements (hybrid/remote options).