Senior Systems Engineer at Harmonia Holdings Group

Washington, District of Columbia, United States -

Full Time

Start Date

Immediate

Expiry Date

03 Mar, 26

Salary

0.0

Posted On

03 Dec, 25

Experience

10 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

Windows Server, Active Directory, Virtualization Technologies, Automation, Cloud Adoption, PowerShell, Python, Public Key Infrastructure, Networking, Troubleshooting, Security Compliance, AWS, Azure, Documentation, Monitoring Solutions, Microsoft 365

Industry

Software Development

Description

Harmonia Holdings Group, LLC is an award-winning, rapidly growing federal government contractor committed to providing innovative, high-performing solutions to our government clients and focused on fostering a workplace that encourages growth, initiative, creativity, and employee satisfaction. Description Title: Senior Systems Engineer Location: Washington, DC Terms: Full-time Clearance: Top Secret with SCI eligibility - Required Travel: 10% About the role We are seeking a highly experienced and technically proficient Senior System Engineer to manage, optimize, and secure critical enterprise infrastructure at the Dept of State in Washington, DC. The ideal candidate will be a hands-on expert in Windows Server, Active Directory, and virtualization technologies, with a strong focus on automation and cloud adoption. This role requires deep technical troubleshooting skills and the ability to work in a secure, on-site environment. What you’ll do Own Windows Server/Active Directory (AD) Services (GPO, DNS/DHCP, OU design, patching, monitoring) across production enclaves, ensuring high availability and optimal performance. Design, implement, and manage enterprise virtualization platforms, primarily using VMware ESXi, for maximum efficiency and resource utilization. Automate infrastructure deployment, configuration, and maintenance at scale using PowerShell and other scripting languages (e.g., Python), focusing on IaC (Infrastructure as Code) principles. Architect, deploy, and manage Public Key Infrastructure (PKI) solutions and oversee certificate/TLS lifecycle management across the enterprise. Perform complex, end-to-end troubleshooting of infrastructure issues, covering networking (TCP/IP, routing, load balancing), identity (Kerberos/LDAP), and application integration. Document runbooks, standard operating procedures (SOPs), and change procedures; participate in scheduled change windows and on-call rotation. Contribute to cloud strategy and migration efforts by providing technical expertise for AWS and/or Azure platform integration. Ensure systems adhere to stringent security requirements (e.g., STIG/RMF/NIST), especially within federal or classified environments. Required Qualifications Active Top Secret with SCI(active or cross-over-eligible). Bachelor’s in computer science, Information Technology, or related field — or equivalent practical experience. 10+ years of Windows Server administration 4+ years administering Active Directory in production environments. Expert-level proficiency in PowerShell for complex administration, reporting, and automation. Extensive experience with virtualization platforms (ESXi, Hyper-V, or KVM), including deployment, maintenance, and performance tuning. Preferred Qualifications (nice-to-have) Deep understanding of networking fundamentals (TCP/IP, DNS, DHCP, routing protocols) and experience with load balancers (e.g., F5/NetScaler). Proven experience in designing and managing PKI and handling the entire certificate lifecycle. Excellent written and verbal communication skills, with a proven ability to document complex systems. Background in AWS and/or Azure infrastructure, services, and best practices. Familiarity with security compliance frameworks and tools for federal/classified environments (STIG, RMF, NIST). Experience with enterprise monitoring solutions (e.g., SCOM, Splunk, health sets). Exposure to Microsoft 365 (M365) technologies, including Hybrid/M365 touchpoints (e.g., Modern Auth, EOP/Defender). ___________________________________________________________________________________________________________ Here at Harmonia we are pleased to have been repeatedly recognized for our outstanding work culture, the innovative work we do, and the employees on our team who make a difference each day. Some of these recognitions include: Recognized as a Top 20 "Best Place to Work in Virginia" Recipient of Department of Labor's HireVets Gold Medallion Great Place to Work Certification for five years running A Virginia Chamber of Commerce Fantastic 50 company A Northern Virginia Technology Council Tech 100 company Inc. 5000 list of fastest growing companies for eleven years Two-time SBA SBIR Tibbett's Award winner Virginia Values Veterans (V3) Certification We recognize that every bit of our success is the result of our teams of hard-working, motivated, and innovative professionals who are proud to call themselves part of the Harmonia family! In addition to competitive compensation, a family-focused culture, and a dynamic, productive work environment, we offer all full-time employees a variety of benefits including, but not limited to Traditional and HSA- eligible medical insurance plans w/ Wellness Incentives for employees and family 100% employer-paid dental and vision insurance options 100% employer-sponsored STD, LTD, and life insurance Veterans Cohort Gym membership reimbursement 401(k) matching Dollar-for-dollar 501(c)(3) donation matching Flexible-schedules and teleworking options Paid holidays and Flexible Paid Time Off Adoption Expense Reimbursement Paid Parental Leave Professional development and career growth opportunities and paid training days Employer-sponsored Employee Assistance Program for employee and family Team and company-wide events, recognition, and appreciation-- and so much more! Check out our LinkedIn, Facebook, and Instagram to find out a little more about who we are and if we are the right next step for your career! Harmonia is an Equal Opportunity Employer providing equal employment opportunity to all employees and applicants for employment without regard to race, color, religion, national origin, age, gender, gender identity, sexual orientation, disability, or genetics. Harmonia does and will take affirmative action to employ and advance in employment individuals with disabilities and protected veterans. To perform the above job successfully, an individual must possess the knowledge, skills, and abilities listed; meet the education and work experience required; and must be able to perform each essential duty and responsibility satisfactorily. Other duties in addition to those listed may be assigned as necessary to meet business needs. Reasonable accommodation will be made to enable an applicant with a disability to successfully apply for and/or perform the essential duties of the job. If you are in need of an accommodation, please contact HR@harmonia.com.

Responsibilities

The Senior Systems Engineer will manage, optimize, and secure critical enterprise infrastructure at the Dept of State. Responsibilities include owning Windows Server and Active Directory services, designing virtualization platforms, and automating infrastructure deployment.