Advanced Practice Providers
Meet Our Team
Ramsey Valenti
Ramsey Valenti, DNP, AGNP-C is a Nurse Practitioner in the Johns Hopkins Department of Radiation Oncology & Molecular Sciences at the Bayview campus. She focuses on upper aerodigestive tumors including cancers of the lung, esophagus and thymus. She has worked within the cancer center for 11 years holding positions within medical oncology and radiation oncology. She received her DNP from the University of Maryland and is board-certified with the American Academy of Nurse Practitioners National Certification Board. She enjoys developing a relationships with her patients as she helps to guide them through the survivorship phase of their cancer journey.
Renee Drew
Renee Drew is an experienced nurse practitioner in the Johns Hopkins Department of Radiation Oncology and Molecular Radiation Sciences. Her primary area of focus is prostate cancer. She received her nursing degree from the University Of Maryland School of Nursing. Renee obtained her Master of Science in Nursing from Coppin State University and specializes as a Family Nurse Practitioner.
Lisa Katulis
Lisa Katulis, CRNP, MHA, MBA, is a nurse practitioner with the Department of Radiation Oncology & Molecular Radiation Sciences at Johns Hopkins University. She is board-certified with the American Academy of Nurse Practitioners National Certification Board. Ms. Katulis has 13 years of experience in Radiation Oncology with a focus on the central nervous system and gynecological oncology services. Her focus is on health maintenance and preventative care for patients living with cancer. Prior to coming to Radiation Oncology in 2009, Ms. Katulis served as an assistant administrator for the Johns Hopkins Children’s Center and as an assistant director of global collaborations in Trinidad and Tobago with Johns Hopkins Medicine International. She is a volunteer for Remote Area Medical, providing pop-up healthcare clinics to the uninsured and underinsured in rural and urban areas. Additionally, she serves on the Community Leadership Board for the YMCA of Towson, Maryland.
Laura Clayton
Laura Clayton has been a nurse practitioner at the Sidney Kimmel Comprehensive Cancer Center for the past 2.5 years. Prior to her NP experience, she worked as an oncology nurse for 11 years at Johns Hopkins. She earned her MSN in 2019 from Georgetown University. Laura is a licensed nurse practitioner in Maryland and is board-certified as an Adult Nurse Practitioner by the American Nurses Credentialing Center. In her free time, she enjoys traveling, spending time with her puppy, training on her Peloton and spoiling her six nieces and nephews.
Judy Hetherington
Judy Hetherington is an experienced nurse practitioner in the Johns Hopkins Department of Radiation Oncology and Molecular Radiation Sciences, having been with the department since 2010. She received her Bachelor of Science in Nursing at the University of Wisconsin-Milwaukee and a Master of Science in Nursing at Johns Hopkins University in 2000. She has worked in multiple inpatient and outpatient oncology centers. She received the Johns Hopkins Friends of Oncology Nursing Clinical Excellence Award. Her follow-up clinic focuses on overall health and wellness while monitoring for side effects from radiation therapy.
Amy Hacker-Prietz
Amy Hacker-Prietz is a Physician Assistant (PA-C) in the Johns Hopkins Department of Radiation Oncology & Molecular Sciences. Amy is on the gastrointestinal malignancies team, which includes pancreatic, colorectal, hepatobiliary, and gastric cancers. She also coordinates the Pancreas Multidisciplinary Clinic. Amy was previously a research scientist in tumor biology at Johns Hopkins focusing on polyamine pathways and drug characterization. Amy now has interest in improving the patient/caregiver experience through multi-level education processes.
Christy Brewer
Christy Brewer, CRNP is a nurse practitioner in the Johns Hopkins Department of Radiation Oncology and Molecular Sciences. She has been with the Department since 2016. She received her BSN from the University of Maryland in 2005 and her MSN, specializing in Adult Primary Care, from the University of Maryland in 2015. She focuses her practice on providing survivorship and follow up for patients with central nervous system malignancies. Prior to working as a nurse practitioner, Christy worked as a critical care RN on the Johns Hopkins Hospital Neuro Critical Care Unit for 11 years. In her spare time, she enjoys travelling and spending time with her family.
Jaylon Garrett
Jaylon Garrett received her Master’s in Science of Nursing specializing in Adult Gerontology Primary Care from Walden University in 2019. Her nursing and advanced practice background is in oncology. She has worked in medical oncology, infusion, and radiation oncology. She works in the Proton Therapy Center at Sibley Memorial Hospital and provides on-treatment and follow-up care. She provides surveillance follow-up care for prostate, head and neck, and CNS adult cancer populations. As part of her dedication to comprehensive patient care, she reviews imaging, interprets laboratory results, and helps manage any side effects of radiotherapy post-treatment. She collaborates with providers on the patient’s team to facilitate continuity of care across the healthcare spectrum.
