Chief Executive Officer
Walker Freeman, MS
Walker Freeman is the Founder and Chief Executive Officer of Avetra, bringing a strong blend of clinical operations experience, site-network development, and strategic staffing expertise to the organization. He earned his Bachelor’s and Master’s degrees from East Carolina University, then launched his clinical research career at leading CROs including PPD, Premier Research, and Parexel. During his time with Parexel’s FSP program supporting Moderna, Walker gained extensive hands-on experience in site monitoring, TMF oversight, and collaboration with high-performing investigators nationwide.
Seeing recurring gaps in staffing quality, site engagement, and operational scalability, Walker went on to build one of the industry’s most specialized clinical-research staffing agencies—supporting CROs, sponsors, and biotech companies with high-performing CRAs, project managers, and clinical operations professionals. He also established a national footprint across the research-site ecosystem, partnering with some of the most productive networks in the United States and improving feasibility, study start-up, and sponsor–site connectivity.
After supporting dozens of trials across multiple therapeutic areas and building CRA teams for numerous CROs, Walker founded Avetra to bring his operational philosophy into a full-service model. Avetra stands on principles of transparency, site-centric execution, data-driven oversight, and uncompromising operational excellence—setting a higher standard for the modern CRO.
Chief Operations Officer
Jami Walker, MSPM, MHA
Jami Walker is a seasoned clinical research executive with more than 20 years of combined medical, scientific, and operational experience. Her career spans the full research continuum—from early scientific training and hands-on laboratory work to leadership roles in site operations and sponsor-side clinical program management. This diverse background gives her a uniquely comprehensive understanding of the clinical research lifecycle and the needs of stakeholders at every level.
Jami’s academic achievements reflect her commitment to excellence and continued professional growth. She holds a Master of Science in Project Management, a Master of Healthcare Administration, a Graduate Certificate in Leadership, and a Bachelor of Science in Biology. This blend of scientific expertise, operational insight, and leadership training positions her as a multidimensional leader capable of navigating the growing complexity of modern clinical trials.
Across her career, Jami has built a strong reputation for developing high-performing teams, optimizing workflows, and implementing efficient, scalable systems that support quality and regulatory rigor. With experience on both the site and sponsor sides, she is adept at bridging gaps, fostering alignment, and driving consistent execution across cross-functional research teams.
At Avetra, Jami applies her broad expertise to operationalize studies with exceptional efficiency and forward-thinking innovation. She plays a key role in shaping the CRO’s operational strategy, strengthening collaboration, and championing approaches that enhance quality, streamline processes, and support long-term partnership success. Her leadership continues to bring clarity, structure, and strategic direction to the programs she oversees—advancing Avetra’s mission and elevating standards in clinical research.
Chief Buiness Officer
Darian Trojacek, MSc
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Darian Trojacek began her research career more than eight years ago at the University of Texas at Arlington, contributing to NIH-funded projects and innovative cardiovascular imaging studies that led to multiple peer-reviewed publications. During this time, she developed a strong foundation in clinical research methodology, data integrity, and academic collaboration.
She later moved into sponsor-initiated clinical trials within a private practice, where she broadened his expertise across feasibility assessments, regulatory submissions, site initiation, patient recruitment strategy, and the development of compliant, operationally sound contracts and budgets. This hands-on site experience gave Darian a deep understanding of both the operational and relational dynamics that shape effective site–sponsor partnerships.
As her career evolved, Darian discovered a passion for business development—identifying strategic opportunities, cultivating meaningful relationships, and helping research organizations grow with purpose. She has since worked with a diverse range of healthcare practices and research groups to expand their capabilities, improve operational frameworks, and establish collaborations that drive long-term value.
Today, Darian carries that mission forward at Avetra, where she supports the CRO’s strategic business development and partnership initiatives. In this role, she strengthens relationships between sites and sponsors, enhances alignment across stakeholders, and ensures Avetra delivers exceptional value through efficient processes, clear communication, and lasting partnership success.
Our Founders
Our Leadership
Avetra was built by leaders who believe that clinical research deserves a higher standard—one defined by integrity, operational excellence, and a relentless commitment to improving patient outcomes. Our founders bring decades of experience across clinical operations, diagnostics, central laboratory management, and large-scale trial execution, having collectively overseen studies involving tens of thousands of participants across diverse therapeutic and diagnostic areas. Their vision was simple: create a CRO that operates with the precision of a scientific institution, the agility of a modern startup, and the accountability of a true partner. Today, Avetra reflects that vision—an organization grounded in expertise, strengthened by innovation, and driven by the belief that better research leads to better care.
Our Vision for the Future of Research
We believe the future of clinical research lies in the marriage of scientific integrity, advanced technology, and uncompromising human leadership. The next generation of trials will demand greater efficiency, cleaner data, integrated laboratory capabilities, and a more unified approach across sites and sponsors.
Avetra is committed to leading this evolution—building smarter workflows, enhancing transparency, and elevating the standard of quality across clinical operations and diagnostics. We envision a research landscape where innovation is accelerated, patient outcomes improve, and evidence generation becomes more reliable than ever before.
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Eliminating Waste and Operational Barriers
The research process is too often slowed by administrative waste and outdated workflows. Avetra was created to remove those barriers. We simplify documentation, strengthen communication, and reduce operational friction across sites, sponsors, and labs. With integrated central laboratory services and clear processes, we eliminate inefficiencies so trials run smoother, faster, and more cost-effectively.
Bringing Innovations to Market
Avetra is committed to empowering emerging biotech, diagnostic developers, and medical technology innovators. We know that world-changing ideas often come from small teams with limited infrastructure. Avetra provides the structure, experience, and strategic leadership needed to move early-stage innovations into clinical validation and beyond. We champion smaller companies by offering the support they need to bring their science to the world.
Setting a New Quality Bar for CROs
Quality is the standard that defines every aspect of Avetra’s work. Our founders established a model built on rigorous oversight, scientific integrity, and complete transparency. With unified central lab and CRO operations, senior-level leadership, and uncompromising attention to detail, we set a higher bar for what clinical research quality should look like—every trial, every dataset, every time.
What Drives Us
A Unified Vision for the Future of Research
Avetra was founded with a shared belief that clinical research can—and should—be better. Our founders envisioned a CRO that operates with uncompromising quality, streamlined efficiency, and a genuine commitment to advancing scientific breakthroughs. From eliminating operational barriers to championing emerging innovators, Avetra was built to redefine how trials are executed and how partnerships are formed.
We combine the discipline of seasoned clinical operations, the precision of integrated central laboratory services, and the agility of a modern, forward-thinking research organization. Every process is intentional. Every milestone is monitored. Every program is supported with senior-level expertise and a culture grounded in integrity, transparency, and collaboration.
At Avetra, we believe that meaningful innovation deserves a clear path—to validation, to approval, and ultimately, to the patients whose lives depend on it. By setting a higher standard for operational excellence and partnering closely with sponsors, sites, and scientific teams, we deliver research that is faster, cleaner, and built on data you can trust.
This is Avetra—where efficiency meets integrity, where small ideas become big breakthroughs, and where the future of clinical research is shaped with purpose.