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Input: Northwestern University police Commander Shaun Johnson  57  died Aug. 9 after a battle with cancer  university police officials said.
" Shaun 's contributions had a significant impact on keeping Northwestern prepared for any type of natural  technological  terrorism  or health crisis.  Shaun  worked closely with the campus community  as well as Evanston police and Evanston fire  to upgrade our emergency preparedness plans " Lewis said.
A high point of  Johnson 's career was when  he  served as the principal planner who coordinated the police department and other agencies as they prepared for former President Barack Obama's campus visit in 2014  Lewis said.
The day went so well  Lewis said  that  Johnson  was commended by members of Obama's Secret Service detail.
 Johnson  also stood out for  his  work developing an "extensive firearms training program  including simulated scenario training to ensure that officers can make critical decisions in stressful situations " among other efforts  Lewis said.
Evanston police Commander Joseph Dugan paid his regards to  Johnson  on Friday.
"His death is sad and untimely " Dugan said. "He served the Northwestern University and the Evanston community with dignity and was a consummate professional. We had an excellent working relationship with  Commander Johnson . It was an honor and privilege to work with  him    he  attended our weekly deployment meetings  coordinated many emergency preparedness drills ...  He  was a true representative of not only the Northwestern University Police Department  but also law enforcement as a whole."
Outside of work   Lewis  recalled  Johnson 's work as an advisor to ROTC students at Northwestern. The commander prided himself as a "Renaissance Man "  Lewis  said  "and found fulfillment in photography  scuba diving and spending time with his family."
"Shaun will be deeply missed and forever remembered as a kind and generous friend to the entire Northwestern community "  Lewis  said.

Northwestern police commander noted for coordinating Obama visit succumbs to cancer