Sr Systems Administrator

<h2>Responsibilities</h2> <p>Peraton has an opening for a Sr Systems Administrator with a comprehensive skill set in E-Mail systems, virtualization technologies and Windows Active Directory.</p> <p> </p> <p>The person who takes this role will spend their first 6 weeks (orientation) <strong>onsite</strong>, 5 days a week, in our <strong>Boston office at 1 Ashburton Place</strong>.</p> <p> </p> <p>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. </p> <p> </p> <p>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.</p> <p> </p> <p>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. </p> <p> </p> <ul> <li>Monitor the health and analyze/maintain the performance of our on prem Microsoft Exchange environments. </li> <li>Keep Exchange patched and up to date with latest supported versions.</li> <li>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.</li> <li>Manage E-Mail retention and archiving policies to keep E-Mail data according to legal requirements and maintain healthy Exchange mailboxes.</li> <li>Manage E-Mail security devices like Proofpoint along with DNS based E-Mail authentication requirements to help secure our communications. </li> <li>Assist in searches of E-Mail related to public record requests.</li> <li>Monitor the health and analyze/maintain the performance of our Microsoft Windows/Active Directory environment.</li> <li>Monitor the health and analyze/maintain the performance of our VMware virtualization environment.</li> <li>Make recommendations and implement changes to improve the overall performance and resiliency of MS Exchange.</li> <li>Manage hardware buildouts to expand and refresh available physical resources.</li> <li>Manage Active Directory core services:</li> <li>DHCP and DNS services.</li> <li>Group policy design and management</li> <li>OU structure and AD replication</li> <li>Test, upgrade, and migrate virtual environments as new versions of software and hardware become available.</li> <li>Participate in rotation for after-hours support. </li> <li>Monitor the health and analyze performance of the VMware environment.</li> <li>Keep ESXi and vCenter patched and updated to latest supported levels.</li> <li>Make recommendations and implement changes to improve the overall performance of the various VMware host clusters.</li> <li>Hardware build-out to expand and refresh available physical resources.</li> <li>Create a strategy that right sizes guest machines to ensure our production environment is free from contention.</li> <li>Architect an environment that optimizes ESXi host performance, reliability and availability.</li> <li>Test, upgrade, and migrate old host servers/clusters to new and align the resources with the requirements of the business.</li> <li>Work with our Cyber Security Team to harden our VMware environment guided by CISA recommendations.</li> <li>Create and document procedures regarding virtualization standards within the organization.</li> <li>Set up layers of protection against ransomware and other modern-day threats to data. </li> </ul> <p> </p> <h2>Qualifications</h2> <p><strong>Basic Qualifications:</strong></p> <ul> <li>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.</li> <li>Must be a U.S. Citizen or Green card holder and can pass a background check.</li> <li>Demonstrated hands on experience performing administration, troubleshooting, patching, and support of MS Exchange, VMware virtual infrastructures and Windows AD</li> <li>Experience and in-depth understanding of Active Directory, DNS and other Windows core services</li> <li>Experience managing private cloud environments as well as developing highly available virtualized environments including defining monitoring standards, operational procedures and growth plans required</li> <li>Knowledge and experience with HPE ProLiant servers</li> <li>Proven experience designing and implementing an enterprise-wide virtual infrastructure using ESXi v8/v9</li> <li>Demonstrated experience working with vendors and end users on system troublesho