I have been with the Department of Manufacturing Technology for about thirty years, twenty-five years as chairman and have recently retired.
( I ( ( ( ( have ( ( been ( with ( ( the Department ) ( of ( ( Manufacturing Technology ) ( for ( ( ( about ( thirty years ) ) , ) ( twenty-five years ) ) ) ) ) ) ) ) ( as chairman ) ) ) and ) ( ( have recently ) retired ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VP (VBP have) (VP (VBN been) (PP (IN with) (NP (NP (DT the) (NNP Department)) (PP (IN of) (NP (NP (NNP Manufacturing) (NNP Technology)) (PP (IN for) (NP (NP (RB about) (CD thirty) (NNS years)) (, ,) (NP (JJ twenty-five) (NNS years)))))))) (PP (IN as) (NP (NN chairman))))) (CC and) (VP (VBP have) (ADVP (RB recently)) (VP (VBN retired)))) (. .)))
I have also worked in different department before
( I ( ( have also ) ( ( worked ( in ( different department ) ) ) before ) ) )
(ROOT (S (NP (PRP I)) (VP (VBP have) (ADVP (RB also)) (VP (VBN worked) (PP (IN in) (NP (JJ different) (NN department))) (ADVP (RB before))))))