Senior Systems Engineer

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.

What will you be doing?

· 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 PowerShell 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.

Do you have experience in Windows support?, · 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 PowerShell automation scripts

Preferred / Nice-to-Have Skills

· 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, NetApp)

· Hardware troubleshooting experience with Dell and/or HP systems

· Scripting and leveraging AI agents to turn repetitive tasks into automation

Soft Skills & Professional Traits

· 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

Additional Information

· 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, * Microsoft Windows Server: 5 years (Required)

• Active Directory: 5 years (Required)
• PowerShell: 5 years (Required)

Work Location: Hybrid remote in Denver, CO 80216

4800 Dahlia Street, Denver, CO 80216 Hybrid work $100,000 - $130,000 a year - Full-time, Pulled from the full job description

• 401(k)
• 401(k) matching
• Vision insurance
• Dental insurance
• Flexible schedule, · 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)

Pay: $100,000.00 - $130,000.00 per year, * 401(k)

• Dental insurance
• Flexible schedule