Infrastructure Senior Systems Administrator - Active Directory & PKI Lead

Resource Management Concepts, Inc. • Crane, IN

92d • $100,000 - $130,000

About The Position

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.

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, Security+ CE).
• 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.

Nice To Haves

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

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.

Benefits

• Competitive paid vacation package with 11 paid federal holidays.
• High-quality, low-deductible healthcare plans.
• Pet insurance.
• Competitive 401K package.
• Paid relocation assistance.
• Tuition assistance and certifications.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: Bachelor's degree
• Number of Employees: 251-500 employees