Nathan Millen

Operations & Aquascaping Director | 25+ Years Oilfield Operations Leadership | Cost Optimization, Asset Utilization & High-Performance Teams

Doha, Qatar

About

With nearly 25 years of hands-on leadership at Halliburton across Canada, Australia, Southeast Asia, and Qatar, I have consistently driven operational excellence and sustainable transformation. My expertise includes leading multi-million dollar operations, optimizing processes, and focusing on Continuous Improvement to enhance service quality, reduce waste, and deliver cost effective solutions that significantly improve profitability and performance. I thrive on building and mentoring high-performing teams, cultivating a culture of continuous improvement, and using data-driven strategies to optimize and streamline business operations.

Experience

  • Owner & Director at Green Life Aquatics
    Nov 2025 - Present · 8 mos

    As Director and Owner of Green Life Aquatics, I lead a boutique freshwater aquarium and aquascaping company dedicated to designing, installing, and maintaining nature-inspired aquatic environments for residential, commercial, and retail clients across Qatar. I combine nearly 25 years of leadership experience with hands-on aquascaping expertise to deliver high-quality, reliable services that prioritize livestock health, sustainability, and customer education.

  • Business Partner & Manager at Blue Marine Life
    Sep 2025 - Mar 2026 · 7 mos

    Management & Business Partner of Freshwater Aquascaping & Sales division of Blue Marine Life

  • Halliburton (24 yrs 10 mos)
    • Business Segment Manager
      Jun 2022 - Jul 2025 · 3 yrs 2 mos

      In my role as Business Segment Manager at Halliburton, I was instrumental in revitalizing a struggling team in Qatar. I focused on enhancing service quality and safety, which significantly improved the company’s market image. My efforts led to a 32% increase in net profits and an impressive 84% boost in employee engagement, reflecting my commitment to fostering a high-performance culture.

    • Area Service Manager
      Mar 2019 - Oct 2022 · 3 yrs 8 mos

      In my role at Halliburton, I spearheaded cementing operations across Southeast Asia, focusing on maintaining exceptional service quality and a zero HSE incident record. I managed a diverse team of 172 employees across 11 facilities, ensuring adherence to stringent safety and quality standards. My leadership in continuous improvement initiatives significantly contributed to operational efficiency and profitability.

    • Service Coordinator
      Dec 2014 - Mar 2019 · 4 yrs 4 mos

      In my role at Halliburton, I coordinated cementing operations across multiple countries, ensuring asset readiness and effective resource management. I successfully led a diverse team of 140 personnel, achieving a remarkable 90% workforce nationalization through comprehensive training initiatives. My efforts in enhancing communication with Supply Chain and Maintenance teams significantly improved operational efficiency.

  • Equipment Maintenance Assistant at The alliance group
    Aug 2000 - Oct 2000 · 3 mos

    Temporary Maintenance Staff (TMS) • Halliburton Entry level probation phase through 3rd company. • Daily maintenance along side mechanics to service and repair equipment. • Training and experience in servicing and redressing Halliburton HT-400, and centrifugal pumps. • Training and experience in servicing and redressing High Pressure Iron including Lotorc Valves and Chiksan iron.