Contact Us

Career Services Team

Location: 722 West 168th Street, Suite 1040 (rooms C & D)
General Email: 

  • Heather Krasna, PhD, MS, EdM

    • Associate Dean, Career & Professional Development

    Heather (she/her) has 24+ years’ experience in career development. She is co-author of the book 101+ Careers in Public Health, (3rd Ed) and also wrote Jobs That Matter: Find a Stable, Fulfilling Career in Public Service. She has worked at the University of Washington and CUNY, and as an executive coach and recruiter. She holds a PhD in public health from Maastricht University, an MS in Nonprofit Management from the New School, and EdM from Teachers College Columbia University. The title of her doctoral dissertation was "Public Health Graduates in the United States: Employment Outcomes and Employer Demand," and she has published several journal articles on the public health workforce. She is a Certified MBTI Practitioner, Diversity Recruiter, and Employment Interview Professional, and serves on the National Consortium for Public Health Workforce Development.

    Specializations: Executives, Career changers, PhD students, alumni, employment outcomes dat

  • Henryne Tobias, EdM

    • Director, Career Services

    Henryne Tobias has 20+ years’ experience in career development with a specialization in health-related careers. Prior to joining the Mailman School of Public Health, Henryne was a Career Counselor at Pace University and Adjunct Pre-Health Post Baccalaureate Advisor at Hunter College. For 13 years, she founded and led a project called, designed to motivate and inspire students to pursue a broad range of health care careers. She earned a Master of Education degree from Teachers College, Columbia University. 

    Specializations: Advising premed students

  • Masako Hashimoto, MS, NCC, LMHC

    Masako (she/her/hers), received an MS in Mental Health Counseling from Walden University in Minneapolis and a BA from Hitotsubashi University in Tokyo, Japan. Over the past 10 years, prior to joining Columbia Mailman, she worked at the Purchase College State University of New York and the University of Connecticut School of Business, holding several roles including Coordinator of Education Abroad for the Office of International Programs & Services, Career Counselor, and Alumni Career Counselor & Instructor. Prior to her higher education experience, she worked in industry in international business and marketing in IT solutions. Masako is a National Certified Counselor, Professional Coach/Career Coach, Licensed Mental Health Counselor in New York, and Certified Professional Resume Writer. She also runs a social skill training group on weekends, especially for people on the spectrum.  

  • Jason Ross, MA, PCC

    • Assistant Director, Career Services

    Jason (he/him) is a seasoned, leader, coach, and facilitator. Jason's approach with coaching is firmly based on effective listening and collaboration with clients to help them create and achieve their goals. Passionate about leadership and professional development, Jason has been coaching and mentoring individuals and groups in the federal government, consulting field, and academia for over 10 years. Jason enjoys helping clients prepare holistic, impactful, and succinct messaging to their respective audiences. 

    Jason worked as a Career Coach at Georgetown University, and, as Management Consultant for a Washington D.C.-based firms where he advised several public sector clients on large-scale human capital transformations. Prior to consulting Jason was an officer in the United States Air Force where he specialized in human resource management and rapid force deployments. He holds an Executive Certificate in Leadership Coaching from Georgetown University and an MA and a BA both from Norwich University.

Career Services also brings in occasional adjunct career coaches. Contact to learn more about their backgrounds or log in to CareerLink for their bios.

Field Practice Team 

Location: 722 West 168th Street, Suite 1040 (room B)
General Email: 

  • Cassie Landers, EDD, MPH

    • Interim Associate Dean of Field Practice; Faculty Lead, General Public Health

    Cassie has over 20 years of professional experience in international Child health and development. She has worked with UNICEF and other international agencies to promote policies and program in support of young children and their families. She is an Assistant Professor in the  Department of Population; Faculty Lead, General Public Health; and Director of the DrPH Program. She teaches courses in child development and global health. Cassie holds a Doctorate in Education and a Master’s in Public Health from Harvard University. 

    Specializations: IRB Pre-screening; International, School-wide, and Domestic practicum with special focus on DrPH and Accelerated students  

  • Ana Jiménez-Bautista, LMSW

    • Director of Field Practice

    Ana Jiménez-Bautista, LMSW, is the Director of Field Practice at the Office of Careers and Practice. Ana has worked for Columbia University/NYPH for over 25 years in a variety of roles, including the coordination of community education and outreach for community and school-based clinics; and international internship/exchange programs. Ana’s life-long mission is to contribute to the improvement of the human condition and the reduction of health and wellness disparities. 

    Specializations: General practicum support, development and implementation of new domestic and international practicum sites, coordination of international school-wide sites; and community, faculty, and staff support regarding practicum.

  • Nery Gonzalez, MPH, LMSW

    • Administrative Director for Field Practice

    Nery Gonzalez, MPH, LMSW has over 20 years professional experience working in the fields of public health and social work, focusing on programs supporting children, adolescents and their families. She is the Administrative Director for Field Practice within the Office of Careers and Practice and is an alumna of the Mailman School of Public Health.  Nery coordinates the Puerto Rico Interpofessional Education Fellowship, and assists students in exploring practicum and other fellowship learning opportunities that contribute to their public health training. She provides administrative support in facilitating practicum stipends and Scope of Work related issues.  

    Specializations: Puerto Rico Fellowship, Interprofessional education, practicum stipends