Infrastructure Senior Systems Administrator - Active Directory & PKI Lead

Resource Management Concepts, Inc. (RMC) provides high-quality, professional services to government and commercial sectors. Our mission is to deliver exceptional management and technology solutions supporting the protection and preservation of the people and environment of the United States of America.

We are seeking a highly skilled Active Directory and PKI Service Administrator to join our team in Crane, Indiana and serve as a Key Position in a senior leadership role. The successful candidate will play a key role in ensuring the security, stability, and scalability of our enterprise identity and access management infrastructure.

Key Responsibilities:

• Design, implement, maintain, and support enterprise Microsoft Active Directory (AD) environments.
• Administer and optimize Group Policy Objects (GPO), DNS, and DHCP services.
• Manage and support Public Key Infrastructure (PKI), including digital certificate issuance and validation across hybrid environments.
• Enhance and secure identity infrastructures through authentication, authorization, and access control policies.
• Troubleshoot and resolve issues related to domain services and directory integration.
• Collaborate with IT security and infrastructure teams to strengthen enterprise identity management and compliance.
• Develop and maintain scripting, automation, and monitoring solutions.
• Ensure adherence to security and compliance requirements.

Requirements

• 7+ years of relevant experience required.
• Bachelor’s Degree in Information Technology or related field required.
• Active Secret Security Clearance required upon hire.
• Must meet eligibility for access to classified information and may be subject to a security investigation.
• Must hold DoD IAT Level III certification (e.g., CISSP, CCNP, CISA, CASP+).
• Demonstrated expertise in Active Directory architecture and administration.
• Strong experience with GPO design, DNS, DHCP, and Windows Enterprise PKI.
• Solid understanding of authentication protocols (Kerberos, LDAP, SAML, etc.).
• Experience with hybrid (on-premises and cloud) environments.
• Excellent problem-solving, analytical, and communication skills.

• Preferred certifications: Microsoft Certified: Identity and Access Administrator Associate, or equivalent.

Benefits

At RMC, we're committed to your career growth! RMC differentiates itself from other firms through its investment in our employees. We invest our resources to train, certify, educate, and build our employees. RMC can offer you a great place to work with a small company feel and give you the experience, tuition assistance, and certifications that will take your career to the next level. We offer Monday to Friday full-time day shift work, and can assist in paid relocation. This also includes a competitive paid vacation package with 11 paid federal holidays. Additionally, we also offer high-quality, low-deductible healthcare plans, pet insurance, and a competitive 401K package.

* Salary at RMC is determined by various factors, including but not limited to location, a candidate's specific combination of education, knowledge, skills, competencies, and experience, as well as contract-specific requirements. The current salary range for this position will be $100,000.00 to $130,000.00 annually.