Data Center Technician L3

Company Overview

Milestone Technologies is a global IT managed services firm that partners with organizations to scale their technology, infrastructure and services to drive specific business outcomes such as digital transformation, innovation, and operational agility. Milestone is focused on building an employee-first, performance-based culture and for over 25 years, we have a demonstrated history of supporting category-defining enterprise clients that are growing ahead of the market.

The company specializes in providing solutions across Application Services and Consulting, Digital Product Engineering, Digital Workplace Services, Private Cloud Services, AI/Automation, and Service Now. Milestone culture is built to provide a collaborative, inclusive environment that supports employees and empowers them to reach their full potential.

Our seasoned professionals deliver services based on Milestone's best practices and service delivery framework. By leveraging our vast knowledge base to execute initiatives, we deliver both short-term and long-term value to our clients and apply continuous service improvement to deliver transformational benefits to IT. With Intelligent Automation, Milestone helps businesses further accelerate their IT transformation. The result is a sharper focus on business objectives and a dramatic improvement in employee productivity.

Through our key technology partnerships and our people-first approach, Milestone continues to deliver industry-leading innovation to our clients. With more than 3,000 employees serving over 200 companies worldwide, we are following our mission of revolutionizing the way IT is deployed.

Job Overview

The Data Center Technician III (L3) is a senior technical operations role responsible for maintaining, troubleshooting, and supporting critical data center infrastructure. This position serves as an escalation point for complex hardware, network, and infrastructure issues while ensuring maximum uptime, operational excellence, and adherence to established standards and procedures. The L3 technician mentors junior staff, leads technical projects, and collaborates with engineering, facilities, networking, and program management teams.

Key Responsibilities

Data Center Operations

• Install, configure, troubleshoot, and decommission servers, storage systems, network devices, and related hardware.
• Perform advanced diagnostics and root cause analysis on hardware and infrastructure failures.
• Lead break/fix activities for critical incidents and coordinate resolution efforts with vendors and engineering teams.
• Execute rack-and-stack deployments, cable management, and infrastructure upgrades.
• Perform firmware updates, hardware refreshes, and lifecycle management activities.
• Maintain accurate asset management, inventory, and documentation records.

Infrastructure Support

• Monitor and support data center environmental systems including power, cooling, and physical security.
• Support structured cabling standards for copper and fiber infrastructure.
• Assist with capacity planning, equipment deployment, and site expansion activities.
• Validate power utilization, rack elevations, and hardware placement according to engineering standards.

Incident & Problem Management

• Serve as the technical escalation point for L1 and L2 technicians.
• Lead troubleshooting efforts during production-impacting incidents.
• Perform root cause investigations and contribute to post-incident reviews.
• Develop preventive measures to reduce recurring operational issues.

Project Execution

• Lead small to medium-scale deployment, migration, and infrastructure projects.
• Coordinate hardware deployments and relocations across multiple data center environments.
• Partner with network, systems, and facilities teams to ensure successful project implementation.
• Create and maintain technical documentation, standard operating procedures (SOPs), and knowledge base articles.

Leadership & Mentorship

• Provide technical guidance and training to junior technicians.
• Assist with onboarding and skills development of new team members.
• Promote safety, compliance, and operational excellence practices.
• Participate in on-call and after-hours support as required.

Required Qualifications

• Associate's degree in Information Technology, Computer Science, Engineering, or equivalent experience.
• 5+ years of experience supporting enterprise or hyperscale data center environments.
• Experience with server hardware from Dell, HPE, Lenovo, Supermicro, or similar platforms.
• Strong understanding of networking fundamentals including TCP/IP, routing, switching, and cabling standards.
• Experience troubleshooting Linux and Windows server hardware platforms.
• Knowledge of data center power, cooling, rack infrastructure, and operational procedures.
• Experience with asset management systems and ticketing platforms such as Service Now.

Preferred Qualifications

• Experience supporting GPU clusters and AI/ML infrastructure.
• Familiarity with Cisco, Arista, Juniper, or Mellanox networking equipment.
• Understanding of storage…