Senior Systems Administrator

Description

Job Summary: We are seeking a Senior Systems Administrator who is technically proficient and possesses leadership capabilities to manage IT infrastructure, coordinate teams, and interact with various stakeholders, ensuring availability and security. Key Highlights: 1. Technical team leadership and interaction with customers/suppliers 2. Cloud AWS infrastructure and diverse systems administration 3. Opportunity at a telecommunications company with a family-oriented culture R2T Telecomunicações was founded in 2009 with the objective of exceeding customer expectations through its experienced professionals, qualified services, cutting-edge technology, and extensive knowledge in the telecommunications sector. We are a large-scale Bahian company headquartered in Salvador, with branches across several Northeastern states—including Bahia, Ceará, Pernambuco, Alagoas, Sergipe, Piauí, and Maranhão—as well as units located throughout the interior of Bahia. With an encouraging and supportive environment, R2T strives to ensure its employees learn to work as one unified family, aiming for customer satisfaction, professional achievements for our staff, and recognition for the company. We are looking for a **Senior Systems Administrator** with both **technical expertise and leadership qualities**, capable of managing and sustaining IT environments while also engaging with customers, suppliers, managers, and directors. The professional will be responsible for ensuring the availability, security, and performance of the company’s platforms, as well as coordinating the support team. **Responsibilities:** * Administer and manage **AWS cloud infrastructure** (EC2, RDS, S3, VPC, Load Balancer, Route 53, CloudWatch, CloudTrail, and IAM). * + Manage **Synology Storage**, including backup routines and integration with Backblaze. + Administer **Linux servers (CentOS, Ubuntu Server)** and **Windows Server**. + Manage virtualization environments using **XenServer**. + Administer **Microsoft 365**, **Active Directory**, and **Terminal Services (RDS)**. + Administer and provide support for **corporate email services**. + Manage **file servers** and **web servers**. + Administer and provide support for the ticketing platform **FreshDesk**. + Configure and manage **pfSense firewalls** (IDS/IPS, rules, failover, load balancing, VPN, and connectivity availability). + **Lead the support team** and assist internal employees. + Engage with **suppliers** and manage **IT equipment procurement requests**. + Prepare technical documentation and audit reports. + Participate in **meetings with customers, managers, and directors**, representing the IT department. **Mandatory Requirements:** * Proven experience in **AWS Cloud administration**. * Knowledge of **Synology storage and cloud backup solutions**. * Solid experience with **Linux and Windows Server**. * Experience with **XenServer**. * Experience with **Microsoft 365, Active Directory, and Terminal Services**. * Practical experience with **pfSense** (firewall, VPN, load balancing, and traffic rules). * Experience in **leading technical teams**. * Strong communication skills and ability to **interact effectively with customers, suppliers, and managers**. **Preferred Qualifications:** * Familiarity with DevOps tools (**Docker, Git/GitHub, Terraform**). * AWS, Microsoft, or information security certifications. * Experience in high-availability environments. **Desired Profile:** * Proactivity and strong **problem-solving abilities**. * A **collaborative and leadership-oriented mindset**. * Organizational skills and attention to detail. * Proficiency in **technical documentation** and audits. **We value diversity—so we want you on our team!** **All our positions are inclusive.**