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Senior Systems Engineer - Enterprise IT Infrastructure

Job in Tysons, Fairfax County, Virginia, USA
Listing for: M.C. Dean, Inc
Full Time position
Listed on 2026-01-06
Job specializations:
  • IT/Tech
    Systems Engineer, Cybersecurity
  • Engineering
    Systems Engineer, Cybersecurity
Job Description & How to Apply Below

Overview

M.C. Dean relies on its IT infrastructure and applications to support critical business functions and drive value to the customers. The successful candidate will join a dynamic multidiscipline team responsible for design,implementation, integration, and support of the enterprise IT infrastructure, which includes secure cloud-hosted and on-premises environments.

As part of the team, the Senior Systems Engineer
's responsibilities will include (but will not be limited to) the following:

  • Development of detailed technical and performance specifications for mission-critical information technology solutions based on business needs, operational requirements, and constraints of diverse internal and external stakeholders.
  • Researching available technology options and their respective functional, performance, security, and interoperability characteristics; test and evaluate technology components;
  • Producing detailed system design
    , including network and systems infrastructure, application hosting, cloud services, and related components, integration with system monitoring and management, as well as cybersecurity capabilities; work closely with System Architect and other senior members of the technical team to drive best practices across the entirety of the enterprise IT platform;
  • System implementation
    , configuration, including extensive use of automation and Infrastructure as Code (IaC), of key solution components and associated cybersecurity controls, network infrastructure, application software, database instances, and other components;
  • Plan, evaluate and execute capacity optimization, updates, upgrades and other lifecycle activities associated with the solution;
    troubleshoot common infrastructure and application problems; provide escalation support for service availability and performance issues;
  • Create and maintain detailed and accurate system documentation
    , including design and configuration plans, designdiagrams, task-oriented procedures, operations and maintenance plans, etc.

Specific qualification requirements for the position include the following:

  • 5-7 years of progressive experience performing comparable systems engineering, implementation, and support functions
  • Expert knowledge of MS Windows platform and services, including Active Directory / Entra

    ID, Group Policy Objects (GPO), strong authentication methods, conditional access policies, virtual desktop infrastructure (VDI), application deployment frameworks and components, networking, and storage services;
  • Advanced knowledge of secure configuration benchmarks and hands-on experience in system hardening;
  • Advanced knowledge and hands-on experience with MS Azure and cloud services and technologies, including compute, database, storage, network virtualization, and security services;
  • Advanced knowledge of scripting, Infrastructure as Code (IaC) and automation platforms, such as Power Shell, Ansible, Terraform, and related;
  • Thorough understanding of network infrastructure, concepts of operation, and protocols such as TCP/IP, DNS, DHCP, SNMP, Syslog, etc.
  • Knowledge of zero trust architecture (e.g., Zscaler) implementation, as well as working experience with network routing, switching, and firewall configuration is a plus
  • Working knowledge of endpoint security (e.g., Defender, Trend Micro), SIEM (e.g., Splunk, Sentinel), vulnerability scanning (e.g., Tenable Nessus/Security Center), and other systems and security management tools

General:

  • Demonstrated time management and organization skills while working in a fast-paced, multidiscipline team environment;
  • Strong analytical and problem-solving skills;
  • Strong communication (oral and written) skills;
  • Proficiency with workflow and lifecycle management systems (e.g. Atlassian Jira)

Education and Certification:

  • Education:
    • Bachelor’s degree in computer science, Information Technology, or a Related Engineering Discipline
  • Certification:
    • Microsoft Certified Professional / Systems Sngineer certification is strongly desired
    • Security+ or CISSP certification is strongly desired

Other:

  • US Citizenship is a requirement for this position.

Abilities:

  • Exposure to computer screens for an extended period of time.
  • Sitting for extended periods of time.
  • Reach by extending hands or arms in any direction.
  • Have finger dexterity in order to manipulate objects with fingers rather than whole hands or arms, for example, using a keyboard.
  • Listen to and understand information and ideas presented through spoken words and sentences.
  • Communicate information and ideas in speaking so others will understand.
  • Read and understand information and ideas presented in writing.
  • Apply general rules to specific problems to produce answers that make sense.
  • Identify and understand the speech of another person.
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Position Requirements
10+ Years work experience
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