Sr Systems Administrator

Peraton

$80K — $128K *
Information Technology
5 - 7 years of experience
Job Overview by Ladders

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.
  • Hands-on experience with MS Exchange, VMware virtual infrastructures, and Windows Active Directory.
  • In-depth understanding of Active Directory, DNS, and other Windows core services.
  • Experience managing private cloud environments and developing highly available virtualized systems.
  • Knowledge of HPE ProLiant servers and ESXi v8/v9 virtual infrastructure implementation.
  • Ability to automate processes through scripting (PowerShell, Perl, VBS).

Responsibilities

  • Manage all Windows / Active Directory environments including physical and virtual systems.
  • Monitor performance and health of Microsoft Exchange environments and apply necessary updates.
  • Work with backup admins to ensure secure, tested backups of the E-Mail system.
  • Implement and manage E-Mail security protocols like DKIM, SPF, and DMARC.
  • Oversee Active Directory services including DHCP and DNS, and group policy management.
  • Participate in resolving after-hours support issues as part of a rotation.
  • Architect VMware environment for optimised performance and reliability.

Benefits

  • Hybrid work schedule after onsite orientation period, offering work-life balance.
  • Opportunity for professional development through training and certifications.
  • Participation in a supportive team environment with a focus on innovation.
  • Engagement in significant projects that influence security and data integrity in communications.
Full Job Description
Responsibilities

Peraton 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 management
  • OU structure and AD replication
  • Test, 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.


Qualifications

Basic 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 AD
  • Experience and in-depth understanding of Active Directory, DNS and other Windows core services
  • Experience managing private cloud environments as well as developing highly available virtualized environments including defining monitoring standards, operational procedures and growth plans required
  • Knowledge and experience with HPE ProLiant servers
  • Proven experience designing and implementing an enterprise-wide virtual infrastructure using ESXi v8/v9
  • Demonstrated experience working with vendors and end users on system troubleshooting
  • Ability to automate processes through the effective application of scripts (PowerShell, Pearl, VBS)
  • Ability to handle multiple tasks while prioritizing and delivering results on time
  • Excellent verbal and written communication skills
  • Must have strong analytical skills
  • Ability to think strategically with technical vision
  • Attention to detail and strong organizational skills


Preferred Qualifications:
  • Certifications:
  • Microsoft/VMware certifications preferred
  • ITIL certification preferred


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.

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