Sr Systems Administrator

ResponsibilitiesPeraton has an opening for a Sr Systems Administrator with a comprehensive skill set in E-Mail systems, virtualization technologies and Windows Active Directory.The person who takes this role will spend their first 6 weeks (orientation) onsite, 5 days a week, in our Boston office at 1 Ashburton Place.Candidates will ONLY be considered if they live local to Boston. Candidates who live more than 2 hours from downtown Boston will not be considered. After the orientation period, the person in this role will be on a hybrid onsite schedule with a minimum of 3 days per week, at the same Boston location. The role could revert to full time onsite in Boston 5 days per week at any time.The System Administrator is responsible for management of all Windows / Active Directory environments. This includes both physical and virtual systems and the services running on them. We are looking for a System Administrator with a strong background in on premise E-Mail system support. They should have extensive experience supporting Microsoft Exchange E-Mail servers, Proofpoint E-Mail security appliances and be able to implement and manage newer DNS based E-Mail authentication protocols such as DKIM, SPF, DMARC and others in this rapidly evolving space. Monitor the health and analyze/maintain the performance of our on prem Microsoft Exchange environments. Keep Exchange patched and up to date with latest supported versions.Work with our backup administrators to maintain valid, tested and secure backups of the E-Mail system including participation in our monthly restore testing process.Manage E-Mail retention and archiving policies to keep E-Mail data according to legal requirements and maintain healthy Exchange mailboxes.Manage E-Mail security devices like Proofpoint along with DNS based E-Mail authentication requirements to help secure our communications. Assist in searches of E-Mail related to public record requests.Monitor the health and analyze/maintain the performance of our Microsoft Windows/Active Directory environment.Monitor the health and analyze/maintain the performance of our VMware virtualization environment.Make recommendations and implement changes to improve the overall performance and resiliency of MS Exchange.Manage hardware buildouts to expand and refresh available physical resources.Manage Active Directory core services:DHCP and DNS services.Group policy design and managementOU structure and AD replicationTest, upgrade, and migrate virtual environments as new versions of software and hardware become available.Participate in rotation for after-hours support. Monitor the health and analyze performance of the VMware environment.Keep ESXi and vCenter patched and updated to latest supported levels.Make recommendations and implement changes to improve the overall performance of the various VMware host clusters.Hardware build-out to expand and refresh available physical resources.Create a strategy that right sizes guest machines to ensure our production environment is free from contention.Architect an environment that optimizes ESXi host performance, reliability and availability.Test, upgrade, and migrate old host servers/clusters to new and align the resources with the requirements of the business.Work with our Cyber Security Team to harden our VMware environment guided by CISA recommendations.Create and document procedures regarding virtualization standards within the organization.Set up layers of protection against ransomware and other modern-day threats to data. QualificationsBasic Qualifications:Bachelor’s degree and 5 years of experience or an Associate’s degree and 7 years of experience or a High School diploma and 9 years of experience.Must be a U.S. Citizen or Green card holder and can pass a background check.Demonstrated hands on experience performing administration, troubleshooting, patching, and support of MS Exchange, VMware virtual infrastructures and Windows ADExperience and in-depth understanding of Active Directory, DNS and other Windows core servicesExperience managing private cloud environments as well as developing highly available virtualized environments including defining monitoring standards, operational procedures and growth plans requiredKnowledge and experience with HPE ProLiant serversProven experience designing and implementing an enterprise-wide virtual infrastructure using ESXi v8/v9Demonstrated experience working with vendors and end users on system troubleshootingAbility to automate processes through the effective application of scripts (PowerShell, Pearl, VBS) Ability to handle multiple tasks while prioritizing and delivering results on timeExcellent verbal and written communication skillsMust have strong analytical skills Ability to think strategically with technical visionAttention to detail and strong organizational skillsPreferred Qualifications:Certifications: Microsoft/VMware certifications preferredITIL certification preferredPeraton OverviewPeraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace. The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees do the can’t be done by solving the most daunting challenges facing our customers. Visit peraton.com to learn how we’re keeping people around the world safe and secure.Target Salary Range$80,000 - $128,000. This represents the typical salary range for this position. Salary is determined by various factors, including but not limited to, the scope and responsibilities of the position, the individual’s experience, education, knowledge, skills, and competencies, as well as geographic location and business and contract considerations. Depending on the position, employees may be eligible for overtime, shift differential, and a discretionary bonus in addition to base pay.EEOEEO: Equal opportunity employer, including disability and protected veterans, or other characteristics protected by law.Job SummaryRequisition ID: 2026-169513Position Category: Information TechnologyClearance: No Clearance Required