Proactive advising (formerly known as Intrusive Academic Advising) was defined by the work of Robert Glennen. Glennen took developmental advising theory one step further to help advisors reach out to students. Programs utilizing proactive academic advising build structures that incorporate intervention strategies mandating advising contacts for students who otherwise might not seek advising. 

NACADA resources:

• Beyond Faculty Referrals: Advisor Facilitated Early Intervention, Academic Advising Today, 2019
• First-Year Community College Students' Perceptions of and Attitudes Toward Intrusive Academic Advising, NACADA Journal, 2016
• Students Benefit from Early Dual-Path Intervention, via Academic Advising Today, 2015
• Intrusive advising 101: How to be intrusive without intruding, via Academic Advising Today, 2013
• Academic mentoring program, via NACADA Blog post, 2012
• Proactive (instrusive) advising, Academic Advising Today, 2012
• Cultivating the potential in at-risk students,via NACADA Webcast, 2009 
• Intrusive advising. Academic Advising Today, 2007
• Advising academically underprepared students, by Marsha A. Miller and Coleen Murray, 2005
• Intrusive advising for freshmen, by Walter R. Earl, 1987
• Intrusive advising for freshmen, via Academic Advising News, 1987

NACADA Conference Presentations:

• Improving Retention and On-Time Graduation: Using Proactive Advising and Tracking Tools to Redirect Exploratory Students -- Janie Valdes
• Let's Get Intentional About This: A Simple Approach to Creating and Implementing a Proactive Advising Center Communication Strategy -- Joya Konieczney

Other resources:

• Academic Advising: Measuring the Effects of “Proactive” Interventions on Student Outcomes, via Higher Education Quality Council of Ontario, 2017
• The first critical outreach point in intrusive/proactive advising, via Academic Impressions, 2014
• Advising students on academic probation, via The Mentor, 2002
• History of intrusive advising, via University of Minnesota

Related topics:

• Proactive Advising Resources from Academic Advising Approaches, 2013 
• Advising Approaches index
• Advising Students index
• Student Populations index