Senior Database Administrator - SQL Server/PostgreSQL

About the Role : We are seeking an experienced Senior Database Administrator to manage and optimize enterprise database platforms across SQL Server, PostgreSQL, and Snowflake, hosted primarily on AWS. This role is responsible for database performance, availability, security, automation, disaster recovery, and production support for mission-critical systems. Key Responsibilities : - Administer and support SQL Server, PostgreSQL, and Snowflake environments - Monitor, tune, and optimize database performance and reliability - Implement and maintain HA/DR solutions including Always On, Replication, Clustering, and Log Shipping - Manage backups, recovery, upgrades, patching, and database maintenance - Support AWS database services including RDS, EC2, S3, CloudWatch, and IAM - Develop automation using PowerShell, Python, and T-SQL - Ensure database security, compliance, auditing, and access controls - Provide production support and participate in on-call rotations - Collaborate with Cloud, Infrastructure, Security, and Development teams Required Skills : - 8+ years of Database Administration experience - Strong expertise in SQL Server (2016/2019/2022) and performance tuning - Hands-on PostgreSQL administration and replication experience - Snowflake administration and support experience - Strong AWS knowledge (RDS, EC2, S3, IAM, CloudWatch) - Experience with HA/DR, backup/recovery, and disaster recovery planning - Scripting and automation using PowerShell, Python, or Terraform and experience with DevOps practices and Version Control (Git) Preferred Certifications : - AWS Certified Database Specialty - AWS Solutions Architect - SnowPro Core Certification - Microsoft SQL Certifications - PostgreSQL Certifications Why Join Us?: Work with modern cloud database platforms, drive automation initiatives, and help deliver highly available, secure, and scalable data services supporting critical business applications. Equal Opportunities Statement: At Gresham, we are committed to building a diverse and inclusive workforce that reflects the communities we serve. We actively encourage applications from individuals of all backgrounds and are dedicated to providing a workplace where everyone feels valued, respected and supported. We make employment decisions based on merit, skills and potential, and do not discriminate based on any protected characteristic. We are also committed to making reasonable adjustments throughout the recruitment process and employment lifecycle.